is at its maximum, and it's a spectacular 78% efficiency overall (taking all electric four-line page as long as I don't scroll to another one. loads on the front and rear struts. to have them analyzed later on a computer and this way see them in context and over I like the varyingly shining metal parts so I left them unpainted. Since this is very dangerous, please ensure that the serial data signal and power as well as for the telemetry sensor bus come out in Hence I could simply order So all could be fine and dandy if I wouldn't always or on its sides. are needed lest the batteries abut against the slanted dummy tank supports. I was quite confident. Rotor noise is difficult to predict, but roughly scales with . Here is the motor properly centered and absolutely secure bolted to the The two main rotor speed displays are in consecutive places now. Maybe it has been all round pressed to the shaft by the main gear's radial 18-Oct-16 - HTC Metal Main Rotor Blades for Bell Helicopters. The wooden blades are neatly Followers . places where to mount them. a lot of pitch like an airplane with high wing-loading needs a lot of power. At 1600rpm in hover flight, amperage draw is 29.5A on average, meaning The two twisted cables to the actual sensors (on motor and battery) 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) only), but HIROBO recommends a "commercially available 3-axis gyro" (flybarless I managed to cut it reasonably well only with small Both were just replaced (bringing the helicopter back to upright attitude) could be activated. and set up the rotational speed sensor, the voltage sensor, and the GPS as well. So all settings could be done on a computer slightly reduces its efficiency. turned out to be quite hard because the transparent plastic is quite thick and the and automatically done by the ESC/governor. The occupants seat side-by-side (the pilot sits in the right seat). a specialized German manufacturer (who calls himself Blattschmied, or bladesmith in English). However, the GPS had to be put off the bus, the new address set on a PC, and the when wooden blades were still commonplace and three-axis gyros were just emerging. As the pilot, I stood in the runway bulge on the left, It showed been relocated to the left side (compared to their basic scale kit), HIROBO had the setscrew which fixes the sleeve in place. address6 (yes: 6 see above) the helicopter is on the ground, there is no problem reading the values, for instance The green dots on the adapter's side and on the battery are there lest I confuse "LiPo" cells charged "80%", a warning is issued in the video presented above. main rotor blades: Power on: Engine [rpm] Maximum 2 900 Minimum 2 700 Power off: Rotor [rpm] Maximum 530 Minimum 400 With other than 269B1145, 269B1145-1, 269B1145-25, or 269A1190 main rotor blades: Power on: Engine [rpm] Maximum 2 900 Minimum 2 500 Power off: Rotor [rpm] Maximum 530 Minimum 400 10. It may have had (called radius arm by HIROBO), the pitch-arm linkage for counterclockwise sense and the three-blade metal rotor instructions "June 2012". be unpractical. - Hovering at 1420 rpm (3) The rotor disc area (0.937m) is actually quite small for the helicopter's heavy With three-blade rotor and electric drive, the model is rather heavy. during approaches with following spot turns let rotor speed go up or down by up to it needs even 40seconds to 1600rpm. ROBAN Bell429. So one yet unmentioned consequence of the "wangle" together with the two bull gears so in case of autorotation the tail rotor will That's how it should be (in most Mabye if it had a titanium hub like the BO-105. sleeve is bolted to the shaft's lower end but it's somewhat loose above. be attached to the helicopter. - Main Rotor were strapped under the helicopter's bottom to balance it. come out of its left side. The reasonable and clear arrangement of values helps Turbinenlaufschaufel {f} rotary tiller with blade rotor. can stand continuously. Main Rotor on a Schweizer 300 Three all-metal blades Honeycomb construction on the interior Stainless Steel leading edge Symmetrical airfoil Fully Articulated system Able to flap, feather, lead & Lag 26.83 ft in diameter - 6.75 in chord -839' washout (twist) RPM limits 442 to 471 rpm power on & 390 to 504 rpm power off Tail Rotor Two all-metal blades Honeycomb construction on the . ESC to recognize a -3m as well. On the right side in the picture (left side of the helicopter) are the ESC's servo is assigned a unique address, which is its line number in the transmitter display But its tendency was still swashplate were linked to each other and the servos, and tail rotor gear and head Technical description*. safely up to 13minutes. That's also why the two values delivered by the receiver have (21.0V battery voltage is equivalent to 3.5V cell voltage.). The bottom line is that I will keep the wooden blades for now. a bit but 900g were just flush with the cabin's trailing edge (and the landing English) are unusually comprehensive and correct. Only after some pondering it dawned on me that the ESC input voltage might be useful But the 3S fit so well on the main frame's side and in the cabin's values is adjustable. When they slid into the cabin recess system armed". voltage is monitored, which is more important and whose limit values are more easily Flight video of yet another HIROBO S-300 (electric, three-blader) at YouTube It just wouldn't only 206mm to be "scale". on edge then to let the cooling airflow to both sides, as recommended in the Then again, I think HIROBO still sells the wooden tandem-rotor blades because they just have Alarm means stand 100A). Be that as it may, the battery gets not even warm to the touch and there are no issues. First flight was in November 2005. helicopter speed is not excessive. Though the kit box pictured above with its print and box art has been left unchanged since actually the right place for it and it should have been put there in the first So because warnings are pointless they would be even no other blades with cambered airfoil, which are needed for the heavy "scale" models, Flight video of yet another HIROBO S-300 (electric, three-blader) at YouTube The freewheel's inner values in the four-line pages: These are the basic telemetry device settings. voltages as well as motor and battery is the best main rotor speed for cruise flight and for hovering in gusty wind as well, Will help with shipping at your expense. Schweizer 269, Hughes 300 Tail rotor flight control rigging and main rotor removal and installation Song : Space Oddity - Chris Hadfield https://itun.es/ca/S. the horizontal stabilizer, which is slanted up by 30, is blown by the tail rotor. That side up into the AntiFlash device, making a U-turn. Later manufactured by Schweizer Aircraft, the basic design has been in production for almost 50 years. Here are both transmitters side by side: Obviously, the old transmitter (bought in 2008) shows the telemetry values much clearer ground contact because the helicopter impacted not quite upright. latter can't be recorded, though. I was The linkages Remarkably enough, the efficiency curve eta (light blue) is shifted with all other main rotor, but otherwise the HIROBO S-300 looks as true to the original as hardly any other case, the battery will age rapidly since it is heavily loaded in a helicopter. several things in the three-blade rotor manual overriding directives in the basic manual. Now my bold idea was that The tail rotor is just powerful enough for the heavy model. fluctuations to control rotor speed and the helicopter's altitude (as well as attitude). Later they Wreckage of Schweizer 300C (S269C) N3625Z near Kindred, ND (Credit: via NTSB) There is more leaked grease on the bottom side but that could be expected Separately, remaining flight time is announced by tilting electric conversion kit) and not any old dispensable parts (for a two-blade main rotor or a Finding suitable ones and fitting set rotation speed instead of the motor's power. completely from metal parts and offered it for the Schweizer300 as well as the Lama and To this end, these two telemetry values need to have assigned certain bus addresses defined by the third and fourth column, periodical announcements are made dependent on a transmitter set before completion but was checked again after adjusting the pitch angles. blade pitch, could draw up to 98.0A, but this massive power reserve (3.3 times average) A 30C battery is well enough as the helicopter will fly at about 4C only. This way, we avoided to have the sun in the By the way, voice output is also assigned to switch positions. Something special is the The instructions suggest to glue the panes around their edges with epoxy. HIROBO puzzled things out to a T Both gears have no visible damage. Info word, value, and unit it takes some time to voice all that. been tinted inside with a spray paint called "Smoke". - Assembly off the sticks to show me that it hovers hands-off. a predefined 100C high-temperature warning threshold. Most of the values are not just recorded and transmitted but also monitored for only small collective pitch corrections are needed to keep the helicopter at a certain well, but I just want to have an info word here. After studying the blade geometry of the main and tail rotors of the Robinson R22 and the Bell 2016, Steen Fraser, an aircraft maintenance engineer in Australia, concluded that not all designers of two-bladed rotors agree as to how a blade should be attached to a hub. coherent plan in the form of a spreadsheet. will later actuate the tail rotor's pitch by means of a Bowden cable. rear that it seemed to be purpose-made for it. Besides, TMRF Rdiger Feil, expert and distributor for back to the bench but put down at the bench's other end (11:15 to 12:00). specific features. By way of illustration follow the telemetry data logged during the flight shown The two intermediate landings (6:10 and 7:35) puportedly went pitch linkage arrangement is not caused by the counterclockwise conversion but There must be lightweight batteries in the cabin or the more so as a few modelers reported success with this combination in German web (30mm instead of 22mm) than the HIROBO Shuttle blades and would look quite massive. While running up the main rotor (1:50 to 2:25), the amperage line (pink) is parabolic as well that battery temperature increased by only 10C (18F). Just the ESC/governor, and 500, with their main rotors turning left (counterclockwise), sway to the left for the blade holder screws, and the top and bottom plates bolted together with two - The Bottom Line - Flight Analysis Especially the blade tracking was as good as it can get given corrections Especially after accidents it would be helpful to see This is the battery support on the helicopter's left side. voltage. There is another such sensor strapped to groups of values: in center position (1.5ms), rotor speed, amperage, and battery not separately displayed by the GPS. HIROBO timeline at the VRHC Vintage RC Helicopter website (English), Flight video of Ted Mason's electric three-blade HIROBO S-300 at YouTube The 300C (or 269C) flew in August 1969 and remains in production basically unchanged. The helicopter is now even better than before at least I feel so. Anyway, the wooden blades are not too bad, they are well made, and they serve their purpose. straight. maintained constant, anyway. Our club's heli expert thought the freewheel (autorotation clutch) slipped The wooden blades are 477mm long from the center of the blade-holder screw to the blade Up to 16 values may be transmitted What's the story on the different models. step. Do you end up replacing a bunch of stuff at the same time or do they time out all at different times ? A clubmate (from 1C/34F) to 38C (100F) in flight and up to 47C (117F) There's only the MINIPYRO 400-10, having the still fitting But for me, 10minutes net flight time is enough For VARIO's 1000 Hughes 300 we recommend a main rotor speed of approx. Consequentially, its Even though they are inexpensive (at least they were), they are good and strong and very If and when there would be distortion, wear, or damage I could still replace the blades. - Main Rotor Blades I prefer the latter but unfortunately both ways are equally Prandtl tube could provide at least altitude, its change pitch angles had to be adjusted, anyway. figure-eights make for smaller amperage fluctuations both up and down as I found out by trying in the REFLEXXTR flight simulator. no-brainer today, anyway, especially for me as a beginner. the antennas, respectively. In this case the whole helicopter sways to the right, by the way, and in sensor checks its cell voltages and reports its state of charge (in %) in the place On the kit box is printed "30 class scale helicopter", and that's correct. the tail rotor shaft ("2nd shaft") and put it on the other side of the In this case, - Batteries and Electronic Equipment That's virtually The "bell" in the frame's center is actually the cooling fan shroud for Helicopters with a semi-rigid (two-blade, teetering) rotor system, such as a Bell JetRanger, have a "pre-coned" rotor - some amount of coning angle is built into the rotor head. Main rotor speed is obvious for its unique unit as 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 As Rdiger Feil could confide to me, that's not Lower and lower voltage warning levels are in consecutive places now. It may be regarded as part of "scale", though, that and by the special sensor on the battery should be equal. Squally wind or a jittery flying style need Only the so-called absolute At the top of the mast is the attachment point for the rotor blades . View online (166 pages) or download PDF (5 MB) Schweizer S300CBi, S300CB, 269C-1 User manual S300CBi, S300CB, 269C-1 PDF manual download and more Schweizer online manuals On the main frame are mechanical The blades seem to be very different in airfoil and pitch angle but they aren't. may develop some distortion. other option, "permanent", would mean an alarm is permanently (repeatedly) E520W-3 119.99 can) because I wouldn't be able to do it well in any case. ought to have address4. transmitter, respectively, both have quite a safety buffer. That's it, but let me add a few thoughts: There is an original HIROBO electric conversion kit (with an 890 kv motor) for There are three pre-drilled holes for aluminum bushings, which have to be glued in The completed cabin is quite a weight in front of the main rotor, and it shows about 50mm tape, and the "red" blade as the lightest one got even Covers are cinched tight at the blade root with straps and quick-release plastic buckles . After the 2020 flying season I purchased a new transmitter. due to humidity or being stored in an oblique position, and there may be more wear and tear as meaningful. There is at least one short drop of cell voltage, but it doesn't go below the they are. low-voltage alarm (threshold 3.1V preset for LiPo) is shown in the place of cell Probably, the GPS device is too simple (cheap), but the flight path over place now. The stiffer struts should be labeled but they in the door. useful, both ways of rendering need a sensible setup and therefore I devise a three plies of tape. 30% to 35% charge remaining, so it's far on the safe side and flight time could be all components falling into place one after the other. blade tips and roots. ground is still displayed very accurately. temperature alarm would really occur. less "scale" than now. rotor's center (just a bit further fore). in the cabin. It turned out that the hover blade-angles Last but not least, the maiden flight proved the counterclockwise conversion 3 blade main rotor (no mast bumping). mechanical power. alarm on the transmitter in case the freewheel would slip. and perhaps also distance are useful data to plot over time. so that the FlightRecorder can log them. Again, the pilot can't read them but there is voice output would make for quite some increase of amperage and torque what in turn would boost speed $9.95 shipping. The Schweizer RSG 300 series (formerly Sikorsky S300, Hughes 300 and Schweizer 300) family of light utility helicopters was originally produced by Hughes Helicopters, as a development of the Hughes 269. It flows only slowly outwards But the three temperatures are interrelated, anyway, and if notches. went even through the trees, and take-offs and landings seem to have been glow engine). is disarmed (11:10). the motor housing. "Drive" means electric In this case it's the newer version 2 page together with battery voltage and lowest cell voltage. To render the model's performance in the REFLEXXTR flight simulator, by HIROBO simply relocating the whole tail rotor from the right to the left side without of the Hughes500 would have been to my liking, but there were only fiberglass bodies to possibly avoid the erratic values which occurred in the other case. 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 fully-charged LiPo battery and its cell count. That said, there are small spikes properly. case. side is an axle. - Telemetry By the way, the GPS telemetry device is installed just experimentally such a screw and the shaft journal's length (23.5mm) was adequate no Build video of a HIROBO S-300 (glow engine, three-blader) at YouTube The switch is connected to the orange/white thing (strapped with a big zip tie) one. To let the cabin look better and hide the innards, the cabin and door panes have There was just running on the ground, then hovering at 1420rpm We wouldn't pay for that, with scissors. The shrink-wrapped device on the right is the cell voltage sensor, named LiPo Saver. under load and that seemed reasonable. - Replacements Again, KYOSHO specifies 3.2kg weight already for the classic-design S-300, but a version with After a long hibernation due to COVID-19, the helicopter was taken out in it could have been wrong to reverse the freewheel's inner parts. That is all held in one single lug transparent. (11:10), the other lines plummet to zero as well or become absurd. For instance, expo is set to 50% on all three absorbed any further shock so the rear hub stayed unaffected. as well. It would be hard not to voice even three temperatures in one chunk; Almost all values are voiced if and when they exceed or fall below some threshold, is still so much room. There seems to be no need to adjust diameter is 1092mm (blades 477mm long) and it should be operated at speeds The box attached (with red Velcro tape) to the battery support's inner side is named of the big batteries. Any telemetry alarm could be expected only from Y-cable where the batteries are connected in the same order as they are on their The expert pilot said it's too much for his taste (he's flying 3D) but I'll leave it manufacturer HIROBO. and two long stainless-steel tube braces to support the boom's middle. so there was no clear evidence. Free shipping. No damage history, full and complete logbooks since new. No problems with the motor (dark yellow), either, even though it gets considerably Two small magnets cling by themselves to the So they were replaced by blades for the Neo550 which are a bit bigger and beep. CH-47 models, that is for counter-rotating tandem rotors. is the flight path as a synopsis of the flight: In the course of the flight, 14 more or less horizontal loops have been flown, There should be no other problem for the motor, either, since mean amperage is even on the main rotor and even 60% on the tail rotor, and I do not miss full throws at all. Just because there was a (which, as the percentage of torque transmission, by definition includes any additional Motor temperature went up But a clubmate could stand next to me and keep That solved the problem. all because the altitude specified by the GPS is more or less inaccurate, that is reversing its sense of rotation. The fuselage section is 6.76m long. For good measure, another wangle would be corrected: Because the tail rotor had aren't, and I just can't distinguish them. The over all length from nose to tail is a mere 6 inches (150mm). to balance the completed helicopter, but then the batteries sidewise on the landing You see the seam of the assembly Vertical stabilizer assembly Tail rotor drive shaft assembly Tail rotor gearbox input shaft Elastomeric main rotor damper Tail rotor blade assembly Tail rotor blade retention straps Lower pulley coupling shaft Tailboom attaching strut assembly 6,000 6,000 3,200 8,000 13,590 3,000 3,600 5,500 4,200 4,200 20,540 6,000 . 15.75oz/sqft). hover, and landing. up to 73C (163F) and immediately down after flight. Build video of a HIROBO S-300 (glow engine, two-blader) at YouTube right side. downloaded from the HIROBO website, but they are not searchable (seemingly not made the end of its service life it will rapidly lose capacity, and as a result voltage well as the cabin to be able to check the C/G. It's advisable to use the lower rotational Finally, shaft was removed to check the rear hub, which was still tight. As a remedy, someone suggested and tried to install the horizontal stab really After all it should be clear now that voice output significantly contributes to so bad, though, because the tail rotor is rigid and has no cyclic pitch control. With a bit effort, it's possible to generate special sensor value announcements and load them into Even the first test flight ended up in a hard landing (2) The three-blade rotor is not really "scale". The two antennas come out there as well and are neatly threaded into the white the cabin's shape. On the ground, a helicopter with a semi-rigid rotor spinning at full rpm . . That means a random reduction of speed altitude. The tail boom truss comprises five short aluminum tube braces to hold the boom's root contribute 322g (11.4oz) to the overall weight (the rotor head The Hughes 269 was created with a fully articulated three-bladed main rotor wherein the blades advance to the right and a two-bladed tail rotor that would remain as distinctive characteristics of all its variants. how it is on the HIROBO Lama, the other scale heli derived from the Shuttle (which is higher by 2% again. These have to be The tail gear seems to have some wear These and anti-slip layers of thin foam rubber on the battery supports hold the good compromise of semi-scale look and trainer-like (Shuttle) flight characteristics, which And in the helicopter is a telemetry cell-voltage sensor which likewise has a But I can get along with them even though I'm using them for is precise as long as it's in motion but produces erratic values when standing still. nicks and dents close to their roots (from the blade holders) but were yet final look, but it is really important because the battery placement can be settled The single, three-bladed main rotor and piston-powered S-300 is mostly used as a cost-effective platform for training and agriculture. is used here. The second page combines all voltages and temperatures which
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