View Full Version : Scorpion Tractor Gyro
01-13-2007, 04:22 PM
We are building the Scorpion Tractor Gyro in AUSTRALIA and it will be produced in a kit with a Suzuki turbo-fuel injected, 3 cyl at 120hp.
It has a composite fuselage and gullwing doors and will weigh in at about 1100lb gross.
Our design was inspired by the the JT-11 concept.(to save you asking)
We would like any feedback on our project (good and bad)
01-13-2007, 04:32 PM
Got a website?
01-13-2007, 06:37 PM
Sorry, but we have no website as yet. Can't see much point in putting up a website when there is little to list at the moment. Should have one up and running by mid-year.
01-13-2007, 06:46 PM
I’m not an expert but I think you need more VS. Your gyro will not do will in a weather vane test.
Check the location of your rotor, it is near the 50% point between the prop and the rudder hinge line, this was the flaw of the Eich JE-2 and it was possible to get the JE-2 into a "P' factor flat spin in a full power climb out, However your twin rudders are much more control than the JE-2 had and may keep you out of trouble.
Thanks for posting the sketch of your new gyro design. Always nice to see folk working on Tractor designs. However, as far as I can tell, you might want to do some more work on the placing of the rotor mast. I've attached your sketch, with some CG positions indicated.
My indications are (of course) very approximate, but I think you'll find them not too far off. The essential problem is that the RTV has to fall BEHIND the aircraft's CG, and yours passes well in front of it. This is a major problem.
01-15-2007, 04:58 AM
We are building .......
Very, very nice
The trasmission shaft, how is it designed?
In my opinon is very difficult!
are you building a prototype or not?
01-16-2007, 12:20 AM
Thank's for the input Duncan.
That was the original drawing I posted, most of your suggestion had already been in the updated construction drawings.
The Suzuki engine is lighter than you quoted and we intend to put the PSRU up front to minimize the torque on the drive shaft and maximize the torque at the prop.
The Suzuki engine will only be used in the prototype as we are waiting for the still to be completed 9 cyl fuel injected radial (650mm dia) 125hp @ 3000rpm with 200+nm torque at 45kg installed operational weight. "TOP SECRET" and no other information will be offered :tape: until it has been fully tested.
Looking forward to some more details on your latest design.
01-16-2007, 12:28 AM
Shaft is Carbon-fibre and is encased in a Kevlar tunnel between the two seats. There is a lot in the construction but nothing too complicated.
Yes we are building a prototype and it should be close to completion towards the middle of the year.
Thanks for your comments.
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