Very cool. This intermeshing rotor wing is the gyroplane equivalent of the powered rotor Karman Helicopters. Just awesome to see it applied onto an RC gyroplane. 👍🏼
Excellent! I was just thinking of designing something like this, did an internet search and here it is. Well done, Juan de la Cierva would be proud. Was thinking of some ideas for pitch and roll control without a collective or cyclic.
I have been interested in gyroplanes for a while, but I’ve never seen this twin rotor configuration. It makes so much sense! It seems very stable and efficient. Are you the first to do this? I also love pre rotate system!
Hi. Love your gyro! I built and flew a full sized gyro for many years., now modelling. I have started building a synchro model and have the 3d printed gearbox well under way. I see your reply to a comment that the blades are rigidly mounted. Does that mean there is no provision for blade flapping at all, or have you attached them so they can rise and fall within limits as they advance and retreat? If so, do you have any details please? Thank you in advance!
Hi. Thanks for your comments. I confirm that the blades are rigidly mounted. The rotors being counter-rotating, there is no need for blade flapping. The blades don’ t rise and fall at all. Good luck with your Sinchro!
Thanks so much for replying. From the video I thought the blue pieces were sift and that I could see a metal plate between the blade bolts? Are the mounting flanges 3D printed? If so, are the metal plates for strength to stop them pulling apart?
The blue pieces are hard plastic. There is no metal plate between the bolts; in fact it’ s a thin plastic plate. Both are unnecessary; they are there because I used two old flapping heads a friend gave to me. I made all this rigid by fitting wide washers on the bolts. Forget about these parts and make two simple rigid rotor heads. That’s all you need.
@@emiliocabezas3565 Aha - Mystery solved! Thanks again for replying. I have made (and wrecked!) many blades for an own-design pusher gyro model that I almost have flying so I would use similar blades for the synchro. They're an SG6042 airfoil which is not symmetrical so I would need left and right versions but that's very easy to do. One more question: are your blade mountings printed plastic or made of metal? Printed is easy for me but I could also use metal or wood.. My gearbox has come out well. It looks different from yours but is mechanically the same and I had fun designing and making it. I'm from New Zealand - it's nice to be able to learn from someone on the opposite side of the world, so thanks again.
I was not thinking of any advantage. It´s been a modelling challenge for me. The counter-rotating rotors can be rigid (no flapping hinges) and no rotor direct control is needed (just conventional rudder & elevator).
Hi Emilio. I am building the DC Gyro that was published in 2018. I have 2 questions. What size 4-stroke can I use? I have two 4-strokes. FS-30 and Saito 40. Also can the DC Gyro fly with fixed head and add rudder and elevator controls? Thank you,
My DC Gyro design was published in RCModeler magazine in 1998. Its engine is a .25 2-stroke. A .30 4-stroke should work OK. And no, the DC Gyro cannot fly with a fixed head and rudder/elev controls, unless you add a small wing with ailerons or a small wing with upturned tips (dihedral angle).
@@emiliocabezas3565 Emilio, to be clear, when I say fixed head, I am speaking about no servo control. I will still use flapping head so the advancing blade can climb without autogyro rolling over. Your DC Gyro fly in level flight without small wing. This is because you have a flapping head. If I keep flapping head, can I use only just rudder for turn and elevator for climb ? I thing the aircraft has to be able to bank in order to turn?
Wahid, I had understood you in the first place. Of course, a fixed head means no servo control for tilting the rotor. As you know, the flapping head only prevents the model from rolling over due to dissymetry of lift between the advancing and retreating blades. With a fixed head, perfectly trimmed autogyro (the rotor head shaft, though fixed, has always a small amount of tilt for level flight, in pitch and roll), you would be able to control it by means of rudder and elevator (able to bank in order to turn, and elevator for climb) for a short while, but you would be unable to recover from a steep bank if the gyro runs into it (due to turbulence or overcontrol); hence the need for ailerons or a wing with upturned tips which allows control with the rudder, due to dihedral effect, like an aeroplane without ailerons.
Nice model, good video. I have never seen a gyrocopter with interleaving rotors. Two things I do want to know: 1st: the rotors where spinning before the plane was going fast, does it has a drive for the rotor or a jump-start device ? 2nd: I never saw a right turn, was there a problem? ps.: 1:10 winding up the not so powerful "jump-start device"
1. One of the rotor shafts has a pulley. A 4-meter cord unwinds, spinning up the rotors very fast. 2. On that flight I felt more comfortable turning to the left. No problem for the model turning right.
Awesome model. Love the intermeshing rotors and clever pre-rotator system. One question if I could; having flown a full scale gyrocpter similar to Benson design, I wonder if it is preferred to have direct gimbal tilting rotor for control as these homebuilt autogyros use or the fixed position rotor assembly with conventional deflecting control surfaces as your autogyro uses. It seems like the gimbal type head would be more responsive but I am not engineer, just speculation.
Thanks for your comments. I have flown a full sized gyrocopter too, namely the spanish ELA 07. Also, I have built and flown many direct control (pitch & roll) single rotor RC autogyros. The direct gimbal tilting rotor is better, but for such an unorthodox model as the Synchrogyro, I preferred the conventional controls, just like the French modeler G. Chaulet (who was the first to build and fly one) did. Tilting head RC Synchro-gyros have been built and flown. Look for "Synchro autogyro" and "Wood RC gyrocopter Cerberus flight" in youtube. The former has pitch & roll; the latter, roll only.
@@emiliocabezas3565 Thank you for response sir. I would like to duplicate your design as flown in video. Is it possible to find plans for this design, particularly the gears as they would be the most difficult item to duplicate? Maybe they can be 3d printed using existing stl file?
Sorry, I don´t usually draw full size plans of my designs, I make 1:10 or 1:5 scale, simple sketches. As for the gears, like I say in the text, they were made by a friend who can operate a 3-D printer. I don´t know if he can, or is willing to, provide a file for duplicating them, but I may ask. If you are interested in the sketches (I´ll have to draw some clean ones) and general info on the model, give me an e-mail address and I will send them when I can find time to do it.
I always wanted to build a Benson from plans and fly it Gyrocopter always wanted to build a Benson from plans and fly it Gyrocopters are amazing. I like the modern ones but too much for me to buy. Never thought about flying an RC one I do fly RC airplanes and helicopters pters are amazing. I like the modern ones but too much for me to buy. Never thought about flying an RC one I do fly RC airplanes and helicopters.
