GP Ultimate Bipe
02-16-2002, 01:30 AM
#3
GP Ultimate Bipe
I am also considering building this plane and would be interested in opinions on powering it with a YS .63
Have a look at this thread too:
http://www.rcuniverse.com/showthread...threadid=46735
It has some references to the GP Ultimate..
Have a look at this thread too:
http://www.rcuniverse.com/showthread...threadid=46735
It has some references to the GP Ultimate..
02-16-2002, 08:16 AM
#4
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Join Date: Feb 2002
Location: Godovic, SLOVENIA
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Ultimate!
GP Ultimate is something that didn't really convince me, but after I flew one from a friend I just copied the plans...
It has 2.9kg, OS.91 FS powered. It's way overpowered, tracks like an old F3A pattern ship, very pleasant to fly, feels very neutral. I was especially surprised how did it perform during the landing - I just slowed it down, and made a perfect 3-point landing. Stalls are non-events, it just mushes and slows down, that's it. Wow. Does great inverted and knife edge spin, inverted flight is a bit slower than upright one, very stable. Rolls are fast, stops right at the point you'd like to. Superb.
I have a ASP.80FS, which is currently on GP Extra 300S .40 (I scratch build one - it came out 2200g with .80 FS, four standard servos and 5cell Rx pack), and think it will be more than adequate for the Ultimate!
And all this in just two flights!
Sašo
It has 2.9kg, OS.91 FS powered. It's way overpowered, tracks like an old F3A pattern ship, very pleasant to fly, feels very neutral. I was especially surprised how did it perform during the landing - I just slowed it down, and made a perfect 3-point landing. Stalls are non-events, it just mushes and slows down, that's it. Wow. Does great inverted and knife edge spin, inverted flight is a bit slower than upright one, very stable. Rolls are fast, stops right at the point you'd like to. Superb.
I have a ASP.80FS, which is currently on GP Extra 300S .40 (I scratch build one - it came out 2200g with .80 FS, four standard servos and 5cell Rx pack), and think it will be more than adequate for the Ultimate!
And all this in just two flights!
Sašo
02-18-2002, 02:15 PM
#6
Great airplane, lots of fun, durable, easy.
GP Ultimate 40 and a YS 63 would be a great combo. Place your rudder and elevator servo in the tail for leadless balance. One good elevator servo with the stock connecting torque rod is fine. I used 1 aileron servo per plan with no problems. Actually, I had a little aileron flutter but cured it with quality interconnecting pushrods (the 2-56 rod with z-bends is no good; use a 4-40 rod with proper clevis attachments).
Build it light and you will have a blast. Is an absolutely honest flying bipe with no bad habit that I can remember. I gave mine away a few years ago, still in almost perfect condition even after aroud 1000 abusive flights.
Mark
Build it light and you will have a blast. Is an absolutely honest flying bipe with no bad habit that I can remember. I gave mine away a few years ago, still in almost perfect condition even after aroud 1000 abusive flights.
Mark
