Extreme Speed Prop Planes Discuss the need for speed with fast prop planes (Screamin Demon, Diamond Dust, Shrikes or any REAL sound breakin'''' plane)

Cermark F16 ready for first flight

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Old 11-11-2002, 05:30 AM
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GeeBee-RCU
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Default Cermark F16 ready for first flight

It's finally finished,It took longer to build than I first expected,Not dificult,Im just s l o w .
It is Bigger than I thought , It weighs about 10 lbs. on my scale.And it is a BEAUTIFUL plane that will have real presence in the air!
I used all 4-40 pushrods on flying surfaces & the 4-40 Carbon flex pushrod on rudder & split elevators,all controls are sealed and SLOP FREE ,locktite & good hardware that I supplied,,,I hardly used any hardware from the kit.
2-1/2 oz of lead in left wing tip for lateral balance & 2-3/4 oz. in tail for CG balance.
2 servos in wing allows very usefull 40 degree flaparon while still having plenty of aileron travel
The Retracts that came with kit work perfectly(at least on the bench)I'll let you know how I like the retracts after that first flight!
The Jett 90 engine is new and will be broken in at the test flight,(12x6 APC)you know,,Start it up,adjust for about a tank and if everything is good I will fly it to break in.
I will fly from 400 foot paved runway ..latter grass!
I will post flight report after first flight,maybe monday(11-11)
By the way,I opened the large scoup on the underside and opened up the bulkhead behind wing to form sort of a flow- thru for air to escape,It might blow the back of the plane off(worst case) or maybe I wont notice as much drag as others have reported
Latter
shakin'Steve
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Old 11-11-2002, 05:00 PM
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Razor-RCU
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Default Sweet!

Good luck and keep us posted!!
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Old 11-12-2002, 11:46 PM
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GeeBee-RCU
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Default It flies!!

First flight :it tracked straight down the center line of the runway ,it lifted off in 250 feet(couldn' help stretching the roll)Verticallllll is straight uphill and after flying a few slow laps I opened it up... this big bird REALLY moves out.,roll& pitch factory low rates were used the whole flight and are a good starting point.
I decided to close off the frout scoop and will experemint with it latter,It flies like on rails and is a Very comfortable airplane to fly.
The Jett 90 started RIGHT UP and with a little fideling I got close to what I wanted,It would Cut out during high speed passes,fuel tank will be first suspect in solving this.

more latter
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Old 11-13-2002, 02:49 AM
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Cyclic Hardover
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Default Cermark F16 ready for first flight

Sounds real good. I have the Jett .90 in the Cermark F-20 probably going to save the maiden for the spring. Congrats.
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Old 11-13-2002, 08:31 AM
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Flyboy Dave
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Default Gee Bee...way to go....

.....a good first "up and down", is a good thing !
I run the "16" also, with an O.S. 1.08 FSR. ( good )

I'm gonna do away with the scoop....too much drag.

Dave.
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