Synchrogyro - RC twin rotor autogyro

My RC synchrogyro design.
Engine: Enya 40 prop 11x5
Weight: 1900 grs (67 ozs)
Rotor (s) diameter: 130 cm (51,2 ")
RC controls: rudder, elevator & throttle.
The synchro gears were made by a friend of a RC club in Murcia (team ARCM)
It was my friend Georges Chaulet (France) who first designed, built and flew RC autogyros with synchronized rotors. He called them 'Synchrogyres'.

[@bcnpopnando7019]

Ahora ya entiendo muy bien el auto-giro, genial vídeo!!!!

[@sganzerlag]

Wow, that's super neat. Congratulations on such a unique model!!

[@emiliocabezas3565]

Thanks Gustavo!!

[@stanleydsouza6723]

Beautiful 😍, Awesome 👌 👏 Amazing 👌 Fantastic..Truly every Aeromodelling enthusiasts loved it..

[@emiliocabezas3565]

Many thanks to all for your kind comments!

[@darveider3574]

Felicidades por ésta maravilla

[@militellomilitello]

Lo felicito. Excelente trabajo!!!!!

[@emiliocabezas3565]

Gracias Carmelo

[@ChoySekMunSimon]

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. 👍🏼

[@ioannisbatas1614]

Superb !!!

[@emiliocabezas3565]

Thanks!!

[@associatedblacksheepandmisfits]

Awesome ❤

[@onmyworkbench7000]

I have flown a lot of single and dual rotor autogyros ( one rotor on the left side and on on the right side) I have to say that was very impressive!!!

[@emiliocabezas3565]

Thank you !!

[@tjr7424]

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.

[@emiliocabezas3565]

Thanks for your comment!

[@skyterrapin]

There is a plan available for a model called Als Gyro....via Sarik hobbies. Slightly different construction

[@sherpagyro]

Congratulations on that flight. A model rarely seen in the forums and that flies really well. Perhaps too windy but it behaves very well.

[@emiliocabezas3565]

Thanks!!

[@RcAircraft]

Nice. 👍

[@billcuming3472]

This reminds me of the K-MAX helicopter. Very interesting design.

[@Allan_aka_RocKITEman]

*_SWEET._*

[@atomicsmith]

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!

[@emiliocabezas3565]

No. Like I said in the text, french modeler Georges Chaulet was the first to build and fly a rc synchrogyro.

[@pylon500]

The pre-rotator system was a clever idea. I wonder if splitting the elevators into elevons would give more precise roll control?

[@emiliocabezas3565]

I don’ t know. Rudder & elevator are effective enough.

[@tungaum7531]

Great how do you think it different from airplane and helicopter!!

[@angelgonzalo2885]

El prerrotador no tiene precio,!

[@AerialRCFun]

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.

[@emiliocabezas3565]

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.

[@jojoma4025]

@@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?

[@emiliocabezas3565]

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.

[@zigavojska1672]

very nice, did it fly ok?

[@stelleratorsuprise8185]

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"

[@emiliocabezas3565]

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.

[@johndelamater6234]

Very Cool! Do you know what is the angle between the gears?

[@emiliocabezas3565]

Thanks John. The angle between the gears is 25 deg.

[@janrc]

What is the advantage of the twin rotors? More lift with smaller rotor blades?

[@emiliocabezas3565]

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).

[@militellomilitello]

IT avoids the tendency to turn over one side this kind of vehicle has during take off. Congratulations

[@marcojaric4030]

muy original. la cabeza con piñones esta hecha en 3d?

[@emiliocabezas3565]

Gracias Marco. Si, está hecha con impresora 3D.

[@kevinshortell7604]

😎👍👍

[@wahidkapadia5652]

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,

[@emiliocabezas3565]

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).

[@wahidkapadia5652]

@@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?

[@emiliocabezas3565]

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.

[@samuelcruz9258]

Great...thats eliminate the side stall?

[@emiliocabezas3565]

Thanks. The rotors being rigid and counter- rotating, any tendency to fall over sideways is cancelled.

[@zecsabbath7160]

cabrito louco >>>

[@remember25october]

Twin rotor = no autoratation, yes?

[@zigavojska1672]

rotor diameter can be smaller how much?

[@emiliocabezas3565]

Yes, it could be 10 or 12 cm smaller; naturally, in that case, the model would fly a bit faster.

[@user-dd7bu7nx9u]

👍

[@user-dd7bu7nx9u]

Чудово.

[@zigavojska1672]

this is interesting video also, the tanden rotor. youtube: Piasecki HUP tandem autogyro in flight

[@techstudent8044]

if the rotor is powered, maybe it could be VTOL

[@Bibliotecario]

I think the rotor isn't powered, just it has gears to synchronize and a string to easy start the rotation when it is pulled out.

[@samuelcruz9258]

2cnd time see the video. Its a fling blender.

[@alibenmerbi821]

can u send to me the model 3d

[@emiliocabezas3565]

Sorry, I have no plans, no 3D file.

[@Mike-01234]

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.

[@user-cl8qy6pi8y]

อ ชัวริภัยจำสีชนพูคำสัน

[@user-mb1jv3co7z]

Что это "нагордили"??