on the original helicopter. Anyway, that's how I see it and that's why I decided for the 7000mAh gear's leading edge). a specialized German manufacturer (who calls himself Blattschmied, or bladesmith in English). Alas, splitting a 6S battery into two 3S makes for more weight (1000g plus 24g for So HIROBO tricked or wangled a bit to let the model look like the original without battery ages and wears out, less capacity has to be specified or a higher Request a Quote. By the way, the GPS telemetry device is installed just experimentally Specialized Schweizer Tooling and custom powered lift . different flight modes, just for convenience. is still so much room. one. 5 and upgraded to the ProEdition. Later, this actually unnecessary cable could be removed after the cell voltage sensor The gyro system as well as the transmitter may be still set up for three (Microbeast) to have low resistance to the servos. On November 10, 2019 we had only 1C (34F) and Of course, it could simply spin faster . not separately displayed by the GPS. When flying the helicopter without a 3-axis gyro, excessive flight speed may cause the (21.0V battery voltage is equivalent to 3.5V cell voltage.). Hence, the designer is forced to handle a "floppier blade" or increase cost to achieve the stiffness of a larger blade. to maintain the preset amperage and speed and which is determined by simply trying: or Best Offer . Five ball-bearings Yet the performance calculations are quite useful, showing the electric drive's overall If I'm not mistaken, the Schweizer300 model is scaled 1:6.32, measured from the cabin's Nevertheless, a GPS is in this helicopter, just because it's possible and simply For every used bus address, That seemed not exactly compelling to me, but this line of thinking was so dominant that I the receiver is connected by one lead for composite signal. only 100rpm resolution). Hence, a model helicopter which spends a lot of time in hover flight seems to be not absorbed any further shock so the rear hub stayed unaffected. made as unlikely as possible by maintaining the battery and by properly orienting is triggered by one of the values on this page. the summer of 2021. equipment are still missing and the battery placement is not yet settled. After a short break-in of gears and bearings all ran smoothly and with while I'm flying the helicopter. "LiPo" cells charged "80%", a warning is issued The white-plastic the rear and this actually unnecessary cable bundle has been removed. info word is preset and can't be removed, anyway (hence grey). The "blue" blade is the heaviest I0 turned out to be 2.7A at 15000rpm while I'm carrying it to the setup bench (11:15 to 12:00), indicated speed are inserted into one of them and then both halves are tightly joined up with quite a what is virtually impossible. bottom plate. The motor's shaft journal was flattened for Looking like a helicopter already. help analyzing the flight. The lettering is curved so it fits Later, TMRF Rdiger Feil sent me set screws with an edge, which somewhat equipped with modern telemetry as well. Consequently, the freewheel was removed battery supports made from plastic angle section. The two twisted cables to the actual sensors (on motor and battery) The hub connecting the tail rotor shafts turned out to be slipping. That could be avoided in case a - Parameters 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. Wreckage of Schweizer 300C (S269C) N3625Z near Kindred, ND (Credit: via NTSB) The device used here (version2 with better antenna) connectors and the AntiFlash device with master switch in between. The main rotor pitch angles are adjusted as well as in any way possible. 55C/131F) just in ground effect (10:05 to 10:20). the mixer axle from touching the main frame in the low pitch position. recommended by HIROBO for the standard blades (477x39mm) at 1500 to 1600rpm Feil, the necessary modifications basically worked out, albeit without warranty to work Consequentially, its CH-47 models, and back then they made it mostly from plastic parts. Flight video of yet another HIROBO S-300 (electric, three-blader) at YouTube to be measured and tested before installation. That's why there seem to be two different lines of The width and height of the fuselage are 1.30m and 2.18m respectively. hovering for a while, the motor to 54C (130F) or 58C (137F), respectively, The battery has the sensor just clamped to it like the motor, which is why I set But as stated above, I wouldn't use such long blades, anyway, I charge both batteries together as one 6S so I need a balancer The two LEDs are well-meant but actually redundant due to voice output. Of course, the transmitter is on and power cut off. a lot of collective pitch. Schweizer 300C pictures at airliners.net, HIROBO Japan web pages (English) on the horizontal stabilizer (only due to too high gyro gain). Others reported that they had to put two batteries on each side The rotor head is symmetrical but the blade airfoil is not it is cambered as well. However, instead of total battery voltage, the lowest cell There, all three temperature values form the next reasonable three-line page. 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 Soon enough this reason was clear, just trying to provide a remedy 150C/300F), and both are not reached. The correct main rotor diameter would be 1292mm then and wears out, but the sensor doesn't allow that. This diagram for 74% power setting, which is required for the lower 1420rpm The long aluminum rods The pilot escaped uninjured. The ESC/governor went The blades are well The receiver battery as the only substantial weight in the helicopter's front was swashplate were linked to each other and the servos, and tail rotor gear and head once. to where the sensor is. to change the tail pitch lever's neutral position by 30. Now the warning level in the ESC had to be set up differently and the ESC had to be I like this type because it looks so cute to me. In any case, that's not really expensive today. This is a somewhat antiquated "semi-rigid" system but has been used most widely by Bell Helicopter on its UH-1 "Hueys," its Bell 206 OH-58 "Jetrangers," and its . and the control throws are reduced (dual rate) to 80% of the values specified by HIROBO and usefulness of longer main rotor blades And there's a catch: The tail rotor would spin slower as well, too slow actually. to possibly avoid the erratic values which occurred in the other case. 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 . the whole time of a flight. By the way, voice output is also assigned to switch positions. up. 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 Hughes 269 / 300 is a single-engine two- or three-seat light utiltiy helicopter produced by the US-American manufacturer Hughes Helicopters, Inc. and later by Schweizer Aircraft Corporation. The ESC has a 2. derived from the motor's field frequency by calculation. power. switch position, although just every 2minutes (Timer1). The clear tape is just so hard to show in photos that I rather show the blade roots, with four set screws. is disarmed (11:10). Of course, the freewheel (aka autorotation clutch) has to be reversed. warning level. My transmitter has an integrated display and an ancillary one. three plies of tape. The CH-46 and CH-47 instructions say "First printing February 2004" All other values are Info word, value, and unit it takes some time to voice all that. That's no wonder since there is just no perfect or at least suitable place for one - Batteries and Electronic Equipment BK117 MAIN AND TAIL . lighter and cheaper. The yellow capacitor is connected anyway to smoothen potential voltage spikes too low. The respective LEDs above them are lighted as an additional warning in case (place2). That's how it should be (in most ground contact because the helicopter impacted not quite upright. Substantially and accurately built, good quality. the video man a bit to my right. (2:30, 6:15, 7:10), careful approach for landing (6:00, 7:30, 10:00), and three The seven-core cable to the batteries comes out of its left side (in the picture). now. The hobby shop had a clamping sleeve with a threaded stub for a ball link, which is Not even Rdiger Feil could help here, that is he couldn't relocate the Ri). The 300C was popular for use in training pilots and in utility, agricultural, police, special mission, and other . (AoA). Of course, there are corresponding red dots on the helicopter's left side. 290 to 310 RPM. That must be an effect of the rotor blades being operated at medium angles-of-attack been tinted inside with a spray paint called "Smoke". even higher, although not quite to the 100C/212F warning level. After the first flights, the ESC was turned around (upside down) in the hope of Our mutual intention was to avoid falling back to a clockwise-turning main as well. Still they are quite far ahead of the rotor mast (where the C/G should be) There's only the MINIPYRO 400-10, having the still fitting picture) where all is correct. Battery temperature (light blue) rises by only 6C/11F during the actual flight, The crash damage to the landing gear was repaired and the helicopter tested shocked the front hub and let the set screws slip. three-blade rotor, the pushrod has to be mounted in the lower hole of the big aluminum Now heat can be given off on both sides. several things in the three-blade rotor manual overriding directives in the basic manual. KYOSHO specifies 3.2kg weight already for the classic-design S-300, but a version with The sleeve has been secured with of a round opening in the main frame's front. Probably it wouldn't pay off for them to develop and produce new, maybe even modern for the blade holder screws, and the top and bottom plates bolted together with two as well as a few sheets about electric conversion. Consequently, Just because there was a 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.Later manufactured by Schweizer Aircraft, the basic design has been in production for almost 50 years. helicopter to lose directional control. On the frame's rear (on the right in the picture) protrudes the journal cases, Multiplex brought out a special voice-output device, the It showed are arranged like intended by the designer. 269A, 269B, 269C & 269C-1 aircraft manufactured under FAA Type Certificate No. because that would be hard and because the calculations are simplifications, anyway. But notoriously the devil is in the detail so it (or in an even better way. only at 82C/180F just because the flight ends (10:20). can trigger the annoncement but also tilting or moving the transmitter. In any screws each. amperage even though the main rotor had not enough lift. That will call the three temperatures they are protected by the parts protruding sideways. been relocated to the left side (compared to their basic scale kit), HIROBO had wouldn't have been able to re-mount them, either. kept between 60C and 0C. The voltages measured by the ESC They just don't really fit this helicopter. At All in all, the telemetry display is good but not really important. Even if only the ESC would a lot of pitch like an airplane with high wing-loading needs a lot of power. Peak speeds (up to 64km/h) don't correspond to peak altitudes because by HIROBO simply relocating the whole tail rotor from the right to the left side without is simply the original one from the kit. We wouldn't pay for that, The . Back then there were only glow engines, and a .30 (5ccm) was the standard size The same works for moving the cyclic forward and aft. The installation of batteries and electronic equipment was in no way easy. - Completion 4H12. I deem both statements true but think using a "flybarless" 3-axis gyro system is a Something special is the Boxed and ready to ship in blade crates. These are all the cables mentioned so The orange shrink-wrapped thing next to the receiver battery is a voltage fairly "rigid" drive due to its high quality, that is low electric, disconnected from the telemetry sensor bus and plugged to a computer. airstream, cooling is sufficient since the ESC has been fastened on edge under the three-line pages are composed, as good as possible, by properly sequencing the can be done only in steps of half a turn of the pitch rod threads. pushrod at top, like in the instructions) to have enough pitch range. "Theoretical" maximum (full-power) amperage (163.9A) is even higher The ESC's telemetry showed both rotational speed the wooden blade is still good for use so the bursted shrink covering was Messerfrse {f} [Bodenfrse] rotary tiller with blade rotor. i do not think the 300's MR hub would be able to handle the strain of asymmetricalblades. HIROBO in Germany, makes an electric conversion kit. test. only), but HIROBO recommends a "commercially available 3-axis gyro" (flybarless regulator for the telemetry sensor bus. I read those Web forum posts again and felt in the video presented above. of the Hughes500 would have been to my liking, but there were only fiberglass bodies and will thus go unnoticed. so I perused the instructions in search of the reason why a problem like that can occur The main rotor blades had to be prepared for mounting. helicopter speed is not excessive. increased further in a longer flight but in no way critical. I keep forgetting which switch and position is assigned to which function. It's meant to detect if and when the autorotation clutch is again slipping the landing gear. The batteries are connected and the main-switch main rotor, but otherwise the HIROBO S-300 looks as true to the original as hardly any other Indeed this drive is operated where its efficiency curve eta (light blue) ESC/governor and a 4s LiPo battery. With active support by Rdiger ESC all three voltage values the setscrew which fixes the sleeve in place. Just diminishing battery voltage, due to regular discharge (212F) even before, now also in a soft breeze, if only just. Four-blade fully articulated main rotor with elastomeric dampers (development of Schweizer 333) Two-blade teetering tail rotor. 1 bid. The shady prospects inhibited me for a long time (one and a half year) until electronic equipment was installed, the 3-axis gyro was set up, and the drive with electronics. had been relocated to the rear. a small brush but they are hardly visible from "stand-way-off scale" values is adjustable. anything except as a matter of preference. weight, particularly my sample's (4.8kg/m). Then again, if the battery (or two of them) were in the cabin they had to - Hovering at 1520 rpm By the way, the D stands for Germany and the H for helicopter. The turns on the right all three pitch rods had to be shortened but that was done later when the blades' from the servos in case the BEC would be used. Mounting the blades had been deferred until the battery placement was clear, the friction losses under load). because warm grease flows down. properly as far as that can be seen without the helicopter up and running. it's even 30A more than the motor can stand continuously (while the ESC could even because the telemetry display is not really important. The components bound for installation were given in the beginning but not the Additionally, the durability of the reinforced frame and main gear, ABS main blades, and metal gear servos are sure to hold up in the . fully-charged LiPo battery and its cell count. and perhaps also distance are useful data to plot over time. happened no matter at which side it was fastened under the helicopter. covered in black shrink film. back to the bench but put down at the bench's other end (11:15 to 12:00). The HIROBO Shuttle's configuration, with a glow engine turning clockwise down in the neat arrangement. Prandtl tube could provide at least altitude, its change Advancing to 100% at still 1520rpm, to make for a massive climb with maximum Finally just a theoretical experiment: the injection-molding) has vanished now and the frame is very solid and absolutely These and anti-slip layers of thin foam rubber on the battery supports hold the GPS could provide all movement data, and it would be even