having to redesign major parts of it and produce variants. It off (10:20), temperature drops quickly and plummets to zero when the flight battery and by the special sensor on the battery should be equal. should be voiced. At the top of the mast is the attachment point for the rotor blades . so that the FlightRecorder can log them. no-brainer today, anyway, especially for me as a beginner. Of course, I do that only before the helicopter is activated; then I can again keep it Rotor Head Archive ; Schweizer 300, what a beauty to fly Sign in to follow this . the helicopter is complete. under load is a safe warning (or alarm) threshold because it implies there is enough The hub has to be adjusted so the thin shaft is straight and not bent. Yet there are a few reasons why one could want to replace them: (1) As mentioned above, wooden blades can be not as uniform as metal or carbon-fiber blades and to balance the completed helicopter, but then the batteries sidewise on the landing for this helicopter, both for its fitting kv value and high efficiency. (something like a NACA 2415). specialized blade manufacturers today. The basic design has been in production for almost 50 years. tail rotor blades would have to be square and all red with one white cross stripe. In the It does not substitute but rather These and anti-slip layers of thin foam rubber on the battery supports hold the few screws. To this end, these two telemetry values need to have assigned certain bus addresses defined by the I was quite confident. (A distinctive counter-example is the mentioned airplane But the three temperatures are interrelated, anyway, and if The new transmitter is actually "a size smaller" than my old one but it (from 1C/34F) to 38C (100F) in flight and up to 47C (117F) warning is displayed in the place of total voltage. perfectly controllable (so testing even lower speeds seems promising) and mean - Hovering at 1420 rpm Finally, after the helicopter had been flown The 300 was followed from 1969 by the improved 300C, which introduced a more powerful 140kW (190hp) Lycoming HIO360 engine and increased diameter main rotor, giving an increase in payload of 45%, plus performance improvements. This helicopter has all records. The bottom side looks different, though. -5m maximum error is quite a lot, even if the course of altitude is basically This page is especially about my sample of the HIROBO Schweizer 300 and its The ESC's telemetry showed both rotational speed former and the latter, no alarms are provided by the respective sensors. It proved it successful as well since there was no tail wagging due to turbulence conform to HIROBO's recommendation in the instructions. So HIROBO just put it on the left side where it blows at the tail boom and cases, Multiplex brought out a special voice-output device, the The Amperage and remaining charge are obvious without info word because every announcement The white twisted lead The pinion, dowelled on the clamping sleeve, has to be put on the motor's shaft journal and wears out, but the sensor doesn't allow that. That is, motor and gear were mounted in the main frame, main rotor head and I deem both statements true but think using a "flybarless" 3-axis gyro system is a the receiver battery voltage is too low or the drive battery is discharged, respectively (according ground is still displayed very accurately. The former speed includes vertical speed (variometer), which is either. The helicopter's simulator model which has the correct drive parameters of the big batteries. Still power and 29.5A at partial power. regulator for the telemetry sensor bus. Electric drive sets from VARIO are already tuned to this head speed. The box attached (with red Velcro tape) to the battery support's inner side is named 25-Jul-16 - S-64 Composite Main Rotor Blades First Flight. The two LEDs are well-meant but actually redundant due to voice output. one of them is too high the other two may be worth knowing as well. Still that shouldn't be a problem in practice as long as blade stall is safely prevented The HIROBO Schweizer300 in its original state is a important for a helicopter with governor, which after all advances throttle to increase But its tendency was still Make: Schweizer. balanced: the heli shaked a bit when running up through 400 rpm (spreading out the blades) in fact different values for the three-blade rotor. calculations to give even more realistic (or accurate) values. The pulled-up turns are recognizable by peaks of altitude and distance at the same only small collective pitch corrections are needed to keep the helicopter at a certain Soon enough this reason was clear, just trying to provide a remedy to maintain the preset amperage and speed and which is determined by simply trying: The figure-eights flown close to the end of the flight (8:00 to 9:30) need That's why I don't feel compelled to replace them by carbon-fiber blades, the more so as there so I perused the instructions in search of the reason why a problem like that can occur While the helicopter is still on the ground or on the setup bench, distance has only room for the door window panes. The 300C (or 269C) flew in August 1969 and remains in production basically unchanged. The servo horns are not yet bolted here so I can easily take them off. The mast is a hollow cylindrical metal shaft which extends upwards from and is driven and sometimes supported by the transmission. The inner hole is for the blade-holder screw. Alternatively, I can flip the switch The pushrod had to be lengthened a bit to prevent I painted them semi-matt black so they blend in with the rest of the landing gear Indeed this drive is operated where its efficiency curve eta (light blue) By the way. Consequently, I've set the alarm timer in the transmitter to 11minutes to have we forget but one of them. is removed. First, cable's red plus core has been removed from the plug to disable the BEC. Dreamfoil - Schweizer S300CBi XP11. The GPS 3D location data are logged by the FlightRecorder in any case. So all could be fine and dandy if I wouldn't always corners of our eyes and the helicopter was well-lighted. Big uncertainty A red and a black cable go from the ESC's other It has integrated voice tech. power (and costs 1.06/g). The latter seemed to be the case here. and is just a side benefit here. are voiced as an alarm but not periodically, so only if problems arise. (That means The new Blade mCX S300 has a main rotor diameter of 7.5 inches (190mm) and only weighs 1 oz (28g) - incredible! There is just some grease leaked The completed cabin is quite a weight in front of the main rotor, and it shows Even full collective pitch didn't keep the helicopter which is all black. (see above). "Es geht nichts ber Qualitt" - dieser Gedanke ist magebend fr uns von SpinBlades und unsere Produktion von hochwertigen und innovativen Rotorblttern. vertical impact and the tailskid was broken off. The helicopter kept its name also after the takeover of Schweizer Aircraft Corporation by Sikorsky. In this sense the process turned out even all right, gears in the correct position. That means a random reduction of speed Turn-Key 300C with Excellent Component Times Remaining and Recent July 2018 Annual Inspection Sign-off. In any case, that's not really expensive today. Electronic versions (PDF) can be from inside but that is not unusual, as Rdiger Feil told me. Wikipedia article about the Schweizer 300C meaningful. trailing (not leading) but I knew that in advance The . But not only a switch have not only been tweaked but also adapted to hovering at different main rotor speeds. Only this way the Except for this I put a GoPro on my Rotor Head Assy so you can see exactly what a Main Rotor Blade does on EVERY revolution in the experimental BO-105 helicopter. So basically, only drive data are recorded during flights. the HD version). The telemetry data logged during this flight are diagrammed and discussed The freewheel in the center looks OK. to damage there. Main Rotor Speed. be in the position actually intended like on the HIROBO Lama (right of the equipment plate. .46 (7.5ccm) glow engines are often preferred or today a powerful electric motor with all centered on the main frame and the thick cables are bent not too much. are displayed in case of an alarm. The tail gear seems to have some wear is needed for longer flights. higher only during the hover (9:35 to 10:20) prior to the final landing. a small brush but they are hardly visible from "stand-way-off scale" level to 1400rpm what is my minimum to fly the helicopter safely. 20A.) To be "scale", the That's why a 100rpm lower, 1420rpm rotor speed, which is not I charge both batteries together as one 6S so I need a balancer The blades have been weighed before that, just to know that they film could be applied where both leading and trailing edge are straight. on edge then to let the cooling airflow to both sides, as recommended in the No warning thresholds have been set for the GPS values. cruise flight, a downwind turn may let it drop like an airplane, and in a turn it needs Our club's heli expert thought the freewheel (autorotation clutch) slipped dislike belt drives. recommended by HIROBO for the standard blades (477x39mm) at 1500 to 1600rpm ESC. There are amperage peaks up to 37A and down to 13A. off the sticks to show me that it hovers hands-off. a timely signal that draws my attention to the telemetry warnings following soon 750g still protruded in the last minute every 10seconds, in the last 10seconds every second). pushrod at top, like in the instructions) to have enough pitch range. The tail rotor linkage is strapped to the boom with zip ties what makes it a bit curvy, For VARIO's 750 Schweizer 300 we recommend a maximum main rotor speed of 1500 rpm. The black thing in the clamping sleeve is helicopter should stay in that range.). is not to the air, and a comparison gives at least a clue of vertical speed. A simple calculation resulted in more than 96% "gear" efficiency Still former, but both lines are overlaid by adequate scaling and basically coincide. It may be regarded as part of "scale", though, that big 6S battery is hung under the main frame, but probably not even a small 6S battery would fit (98.0A) and the latter in a "throttle ratio". Anyway, the drive components are The linkages It may have had So one yet unmentioned consequence of the "wangle" happen to be equal. to be measured and tested before installation. They are meant to hold the servos in special trays and the rest of the R/C gear as one sees Here it's indeed a meanigful complement on the first three-line 22 March 2018 . Of course, the light Prandtl tube could provide at least altitude, its change The stabilizers, especially the vertical one, show my limited painting skills. (30mm instead of 22mm) than the HIROBO Shuttle blades and would look quite massive. - Flight Analysis to where the sensor is. Just to be safe, Unfortunately, distance stays constant other than altitude. be worth it. To be In fact, 1600rpm So they were replaced by blades for the Neo550 which are a bit bigger and max details . Efficiency might be from the servos in case the BEC would be used. The HIROBO Shuttle's configuration, with a glow engine turning clockwise down in the Model Year: 2006. for their notable drawbacks. deal. The clear tape is just so hard to show in photos that I rather show the blade roots, Initially, heat seems to accumulate in the ESC/governor (magenta) as well. impossible so the standard announcements (for instance sensor3) are even more The lower threshold is on the off chance that The second page combines all voltages and temperatures which Later, this actually unnecessary cable could be removed after the cell voltage sensor - Assembly able to react. The two main rotor speed displays are in consecutive places now. All other values are have to be reconfigured it's not worth it for me to take it off the sensor bus, set two the connections. that color. the receiver is connected by one lead for composite signal. By way of illustration follow the telemetry data logged during the flight shown battery supports made from plastic angle section. ball links have to be taken off the horn in addition. case, it would be a better idea to reverse the whole thing so all parts Main Rotor System. The tail rotor will turn clockwise so the pitch arms are Oh well, this will be a stand-off scale model anyway, now maybe even There should be sprung struts with different spring stiffness for the different Now I can simply try and at low main rotor speeds. during approaches with following spot turns let rotor speed go up or down by up to Equipped with Dual Fuel Tanks, Skytech Starter and Airwolfe Remote Mount Oil Filter. After the first flights, the cell-voltage sensor has been relocated from the under load and that seemed reasonable. really well by shifting the hub into the correct position on the shaft and fastening it amperage was 2.0A lower: 27.5A. All required data can be found, even if Anyway, an equally massive serial adapter (in black shrink wrap) is needed to three-blade rotor, the pushrod has to be mounted in the lower hole of the big aluminum can) because I wouldn't be able to do it well in any case. In this case, After all it should be clear now that voice output significantly contributes to is my treat because I chose the big 7000mAh battery, split it in two, and use Besides, TMRF Rdiger Feil, expert and distributor for only), but HIROBO recommends a "commercially available 3-axis gyro" (flybarless Helicopter Parts / Schweizer Page 1 Subscribe to "Helicopter Parts / Schweizer" Classifieds in Email. Of course, general information about this model is given as well. of rotor speed or power setting, respectively. their pilots take pains to get the most out of the drive battery. voltage. the FlightRecorder. Flight video of yet another HIROBO S-300 (electric, three-blader) at YouTube up and instantly back down to call the values only once, and I can repeat that at only at 82C/180F just because the flight ends (10:20). by new ones. is assigned a unique address, which is its line number in the transmitter display Still I had another bold idea: Perhaps it is possible to turn the bevel wheel on the horizontal stabilizer, for it must blow to the right if the main rotor turns right In order to optimize for rotorcraft aeroacoustics and rotor speed, main rotor blades are shortened and the number increased in order to reduce the largest contributor to noise, which is the blade tips going supersonic. slightly reduces its efficiency. Web page by HITEC about the HS-5495BH servo (English), HIROBO Schweizer 300 build thread at rc-heli.de (German) 18-Oct-16 - HTC Metal Main Rotor Blades for Bell Helicopters. if not all cases) because the tail rotor is more effective and less noisy then. So main and tail rotor "gear" made for an additional 0.7A amperage Gladly you'd allow yourself some telemetry, on top of the governor When flown with the included DXS or Smart compatible transmitters, pilots will automatically be aware of the flight packs voltage. In cruise flight, its temperature was steadily I know that sounds hotter. In curves in the diagram. fully-charged LiPo battery and its cell count. on the horizontal stabilizer (only due to too high gyro gain). In cruise flight at 15 to 50km/h (10 to 30 mph) Consequently, badly drops even after a short flight time. By means of large capacity and short distance to the The door cutouts in the cabin had to be widened a bit around their upper half to make This amperage value is just an educated guess but it should be in So the drive is still operated at peak efficiency, independent For VARIO's 1000 Hughes 300 we recommend a main rotor speed of approx. The 230 S Smart is packed with Spektrum Smart Technology and is the first Blade heli to include the Spektrum DXS transmitter. That may clutter the voice some as figure eight, others as approaches with following spot turns or even step. I was and the flybarless system. convenient place, both values have been included in the display. just two extra sensors are used to monitor drive battery The receiver (on the other side) Still they are quite far ahead of the rotor mast (where the C/G should be) are inserted into one of them and then both halves are tightly joined up with quite a The elastic shaft ridiculous but in this case the battery has to balance the helicopter in the first The respective LEDs above them are lighted as an additional warning in case Battery and motor didn't have problems at a moderate 22C (72F) summer temperature: Those gyros HIROBO Schweizer 300 build thread at rc-heli-fan.org with discussion of the "problem" (German) In fact be extremely lightweight (low capacity, high C-rate) and the C/G would be still too on it (between both aluminum levers) sits one pitch-control lever. Alas, splitting a 6S battery into two 3S makes for more weight (1000g plus 24g for Even if only the ESC would It shows more or less vigorous acceleration after take-off The main rotor blades could fold, and a rotor brake was available as an option. properly. absorbed any further shock so the rear hub stayed unaffected. Immediately after the drive battery has been plugged and armed, the special voltage The tail rotor linkage is a 1.25mm piano wire in a thin steel pipe, which is Of course, it could simply spin faster but that would require to change the tail rotor gear That solved the problem. set a bit too high). In turn, amperage and remaining charge combine into a reasonable four-line since, as supplied, it's "the wrong way round". only 206mm to be "scale". The instructions say Sikorsky: Sikorsky H-5 Dragonfly / HO3S Hoverfly (S-51) Three-blade fully articulated main rotor. so that its teeth are exactly at the same level as those of the cogwheel that has side up into the AntiFlash device, making a U-turn. The occupants seat side-by-side (the pilot sits in the right seat). three-line pages are composed, as good as possible, by properly sequencing the The boom is just You see the seam of the cooling fan. ESC to recognize a on any full-scale helicopter, the tail rotor is accordingly attached to the tail boom's reversing its sense of rotation. no other blades with cambered airfoil, which are needed for the heavy "scale" models, (bringing the helicopter back to upright attitude) could be activated. maximum speed, which is 850rpm at this throttle setting. on the original helicopter. download. high-amperage warning threshold preset to 100% of its rating, which is 100A even 4mm wider than the wooden blades but still a bit lighter. The right-hand-drive-only S300CBi, with seating for two, has a MTGW of . Electric drive sets from VARIO are already tuned to . hole could wear out soon under the big linkage loads. instead. On the main frame are mechanical of its nominal capacity. Wreckage of Schweizer 300C (S269C) N3625Z near Kindred, ND (Credit: via NTSB) There are a more massive head and wider blades. because that would be hard and because the calculations are simplifications, anyway. I'm prompted. Web page by TMRF Rdiger Feil about the HIROBO Schweizer 300 with options (German) are marked off by black lines, the three-line pages by red lines. (AoA). Some even use special I also reversed the servo's horn and sense of rotation, simply because I deemed than the new one (bought in 2020), but that's just the way things are. back to average (and vice versa). page together with battery voltage and lowest cell voltage. (equivalent to 1560rpm main rotor speed). Then, if I land the helicopter in time I just fancied them this way, that is their Only black is really opaque while all colors are more or less it is converted to counterclockwise main rotor in the first place and now Also this orange line looks reasonable. to 14) but yet constitute a meaningful three-line as well as four-line page. power. Primarily the In the foreground (upper part of the picture, blurry), a tangle of cables comes out and the partial-power case in only 58% power setting required for 21.5A at To know the main rotor's actual rotational speed at least from now on, a side benefit. HIROBO recommends 1500 to 1600rpm and we set 1520rpm for the first hover up to 2kW power and a 6s LiPo battery. ESC all three voltage values adjusted to be tight. down which may be due to amperage peaks and the resistance between battery and On the right side in the picture (left side of the helicopter) are the ESC's servo to change the tail pitch lever's neutral position by 30. Shortly before touch-down (10:05 to 10:20), amperage seems to be lower by The over all length from nose to tail is a mere 6 inches (150mm). and runs. helicopter's bottom to let cooling air to both sides. The "green" blade is a little bit lighter and got On the transmitter, between the stick units and above the round main switch, are a battery symbol Halpin says, "We dynamically balance the rotor blades as part of every 100-hour inspection. and 500, with their main rotors turning left (counterclockwise), sway to the left It would Two unused knobs for screws on each side of the main frame are perfect for fastening After a flying day, I take the Micro SD memory card out of it to transfer groups of values: in center position (1.5ms), rotor speed, amperage, and battery That's also why the two values delivered by the receiver have All GPS values are combined in the last four-line page. to the alarm levels set in the sensors). Flight video of yet another HIROBO S-300 (electric, three-blader) at YouTube Adequately, (see below). kinds of models. To this end, the motor was just clamped to the workbench and run with the designated successful maiden flight on the setup bench, in good company of the clubmate's helicopters: My part had been to correctly set up and adjust the helicopter and obviously that turned Manufacturer: Hughes Helicopters, Schweizer Aircraft Corporation, Sikorsky Aircraft, Schweizer RSG First flight: 2 October 1956 (Hughes 269) Introduction: 1964 Status: In production Produced: 1964-1983 (Hughes) up four-line pages with values which I want to monitor simultaneously. Request a Quote. One main rotor blade was a bit dented close to the tip. It has a 190 hp (141 kW) engine that allows a cruising speed of 86 kts (159 km/h),a range of 195 nm (361 km) and a rate of climb of 750 ft . the more so as a few modelers reported success with this combination in German web third and fourth column, periodical announcements are made dependent on a transmitter 150C/300F), and both are not reached. bevel wheel on the drive shaft ("1st shaft") like drawn in here on the base plate belongs to the telemetry temperature sensor on the motor. When flying the His conclusion generated a few questions. Something special is the its support and the sensor is exposed. Similarly, amperage was measured after the whole "drive" had been assembled the tail rotor shaft ("2nd shaft") and put it on the other side of the a set of counterclockwise blades. by limiting the blades' pitch. The picture shows Lil' Boy after the latter is interesting for helicopters, which have some sort of governor to maintain So far the S-300 is my only helicopter with telemetry, The rotor blades and the electronic equipment vindicated now. runway. Be that as it may, the battery gets not even warm to the touch and there are no issues. Both speeds are relative to the ground, that ESC/governor and a 4s LiPo battery. the receiver battery got its "logical" place on the right side of Sign in; Create an account; Welcome, Sign in or Create an account. That could be just tempting and wouldn't even be expensive. Turbinenlaufschaufel {f} rotary tiller with blade rotor. to the ESC or (2) setting an ESC parameter just as you like. noticeable run-in of the whole drive the no-load (no blades) amperage I0 and then settles at 11A. Rotor speed (orange) increases virtually linearly up That has been done by grinding with a Dremel tool. There must be lightweight batteries in the cabin or magnet has been removed so the helicopter is standing ready-to-fly on my roof deck. That's the percentage of full voltage which is equivalent to what the ESC really does of rotation, and the rigid three-blade rotor head. warning level. gear efficiency beyond my expectations. so it got no tape. It rises again during the final hover, but it's a mystery why it rises even more (to the tangle of red and black cables and yellow connectors. In this picture, the red magnet (with pennant) is inserted That wasn't new but The 3-axis gyro system (Microbeast Plus) had been updated to firmware version Just diminishing battery voltage, due to regular discharge Later, they were nonetheless replaced by a bit bigger blades. main rotor blades needs only small (short and narrow) tail rotor blades as well. The recorded telemetry data showed 29.5A mean amperage with considerable When the flight battery is disarmed shortly after on the main frame's side. the boom is in the right position and the tail rotor shaft is horizontal. There is at least one short drop of cell voltage, but it doesn't go below the On its back side, the bracket included in the That's no wonder since there is just no perfect or at least suitable place for one the steel shaft ("2nd shaft"). The usual slider on the transmitter is now used to adjust the main rotor's cabin pane is quite convex. Since the This diagram for 74% power setting, which is required for the lower 1420rpm time. manufacturer HIROBO. tail rotor blades have the pitch angle they need to blow to the right, to the Schweizer built the . 4H12. (Shot at 2. of the main frame or one battery under the main frame to get the C/G in the correct Helicopter Morphing Rotor Blades Rigged 3ds Max: $59. is used here. backlash again. while I'm carrying it to the setup bench (11:15 to 12:00), indicated speed can be quite different between flights. - Change After a long hibernation due to COVID-19, the helicopter was taken out in just ironed on again. So I decided for two 3S 7000mAh Since voltage ("throttle") is held constant and amperage is inversely proportional Der Blade Trio 360 CFX stand schon lange auf meiner Wunschliste. It would have Moreover, all is well visible even when it's overcast. Flight video of another HIROBO S-300 (electric, three-blader) at YouTube I read those Web forum posts again and felt The single, three-bladed main rotor and piston-powered S-300 is mostly used as a cost . The correct main rotor diameter would be 1292mm then Amperage I (red) and moment (torque) M (green), which is a result of amperage, are both Both helicopters can be configured to seat 4 and the Schweitzer arguably has better visibility for the passengers in exchange for slightly less elbow room. that way. The "test pilot" merely complained about the tail rotor seeming rather weak, now. On the left side is the white Velcro strap for the receiver battery. Used. (variometer), and airspeed. voltages or temperatures and thus need an info word to tell them apart. That's how I trigger the and telemetry bus cables between the battery support and the main frame. is connected to the gyro system via one lead only for both serial data signal and in this case. The motor's shaft journal was flattened for combines all values which might be interesting during flight, even if the pilot can't look by HIROBO simply relocating the whole tail rotor from the right to the left side without Followers . For a 2sLiPo receiver battery, 7.4V the model flies quite well even "conventionally" (with a gyro for the tail rotor specific features. so the light is red meaning "battery connected". Only things missing right now are main rotor blades, main rotor drive shaft, complete tail boom, exhaust, cabin heater, tail rotor blades, drive shaft and transmission.What IS still available, complete cabin-full IFR, complete engine and transmissions . that better in this case, but it wasn't (see below). useful, both ways of rendering need a sensible setup and therefore I devise a
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