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goflyrc
01-18-2006, 12:04 AM
:D Has any one put together and flown a Ultrafly Ultimate?My main concern is the CG, and witch wing to balance top or bottom. I will be using a AXI 221220 and a 8 cell 900mah. Any help will be appreciated before the first flight.
gofly...........

Mike Parsons
01-18-2006, 12:25 AM
gofly,
This is an excellent plane.

Here are a couple of threads on the Ultimate
http://www.wattflyer.com/forums/showthread.php?t=3512&highlight=ultrafly

http://www.wattflyer.com/forums/showthread.php?t=3690&highlight=ultrafly

Oops..didnt finish typing.
balance the plane upright and by the top wing. I would have to compare the weight of my setup against yours. THe 8 cell Nimh pack might save you as I think the 2212 is a pretty light motor.

Oh..and welcome to Wattflyer! :)

LuckyArmpit
01-18-2006, 05:09 AM
I have the Ultimate by Ultrafly. The CG is 100 mm back from the LE of the top wing. Mine is powered by a park 400 3700kv mated to a himax gearbox at 5.3 to 1 gearing. Prop is an APC 11x3.8. Battery packs are 3S 1800 mah lipos. Weight is about 25 oz.
The plane flies great!! Just got done repairing mine due to a full throttle anomaly. If your going with nimh's, your weight is gonna be more.
I put my elevator and rudder servos in the fuse towards the back of the plane. Using 9 gram servos.

Dave...

goflyrc
01-18-2006, 05:16 PM
Thanks Dave...........goflyrc