Hello rcflierfl, (Jim)

You asked for some action shots, had to wait till my wife could take them. Here's four-

Joel

Nice shots. The background scenery is nice too. Would it be possible for you to take some side profile pics and possibly some generic dimension of the model?

Thanks

Wahid

Joel,
Looks better in Action.. Looks like you got close to the wife a few times..Maybe a good telephoto lens.. Look forward to seeing in live in action.
Jim

Hello Wahid,

Here are some facts and dimensions I believe you're after:
Rotor Diameter 56 inches, 2 inch cord, flat bottom clark Y airfoil.
Aircraft weight is 5 lbs. 2 oz.
Engine OS LA .40 with 4 degrees down thrust and a 10/6 prop.
Aft tilt ten degrees.
Fuselage length 30 inches from top of firewall to aft end of horizontal stabilizer (not including elevator).
Fuselage height 6 inches at tallest point behind pilot.
Horizontal stabilizer cord 7.5 inches
Horizontal stabilizer lenght 18 inches.Made from 3/16" balsa.
Vertical stabilizer is 3 5/8" high above horizontal stab and 13 1/2" long from fwd, end to aft end of rudder.
The strake below the fuselage is 1 1/2" tall at the highest point.
The rotor hub plate is 10 1/2" above the top of the fuselage in front of the pilot.
the landing gear spread is 17 1/4" and 6" tall

HI Joel,

Thats a beautiful model i have ever seen & have already fallen in love with it. Can you give more details about the pylon & hub with close pics.
also if a plan incase you have.

regds
sandeep.

Hello Sandeep,
Thankyou for the compliment about the Gyrace II. I purchased a set of plans from Bob Holman plan service about two years ago for the Gyrace designed by a Mr. Boddington from England. The Gyrace in the photograph is somewhat different than the origional Gyrace. However if you had a set of plans in front of you you could see that the fuselage is the same as the origional. The vertical stabilizer had to be changed to allow the rotor to pass without striking the tail. Below you will see four photos of the rotor mast assembly, I hope they will give you the information you requested.

Regards, Joel

joel,

thanx for the quick reply & information. that was really very nice of you.

Just wanted to know whats the material you have used for the hinge i.e for the sideways tilt control, seems to be some flexible sheet sandwiched between ply.

and the triangular hub on which the blades are mounted. is that flexible too.

the mast seems to be at some fixed angle, how much?

hope not bothering too much, Actually i am trying to convert my high wing trainer into a gyro. my plan is to put up a mast in place of the wing and do some minor mods to get it up.

Also how are you controlling the pitch, i dont see any pitch control on the mast.

regds
sandeep.

Hello again Sandeep,
The lateral control hinge is made from .032" P/P.
The hub is made from .060" fiberglass circuit board material. It is fairly rigid.
The aft tilt is 10 degrees and the engine downthrust is 4 degrees.
The pitch control is obtained from the elevator just the same as most other aircraft.
Good luck on your conversion! There is a wealth of technical information that will help you if you will look up Jim Baxter's site at autogyro.com. You could also try gyronuts.com as another good source.

Regards, Joel

hi joel,

one last question, I have got futaba S3003 servos, can they handle the mast load or do i need better servo there.\

your advise pls.

regds
sandeep.

Hello Sandeep,

I don't think the 3003 will work for a gyro the size of the Gyrace II. I am using a Hitec HS645MG because it has plenty of torque and metal gears. In fact, I think if you talk to anyone who has been doing very much gyro flying they might tell you to always use metal gear servos for any rotor control application because of the loads encountered. The plastic gear servos are fine for all other functions such as throttle or control surfaces. My very first single rotor autogyro failed in flight when the plastic gears stripped on a Futaba S3004
servo causing a complete rebuild of that aircraft.
If your gyro is small and light enough you might be able to use the S3003 for lateral control if you care to gamble with all your hard work, I would not try it.

Good luck,
Joel

Joel,

thanks for the advise, i am very much now aware of what i have to do.

I have thought upon building the Gyro Falcon, design is simple and no servos for the mast, its a plain rudder, elev job.
the other model in my mind is the whistler also this too is simple no complication in construction.

regds
sandeep