|
|
u-47 Berkut
By its desing the plane owes much to Steve "Jetset44"磗 designs icluding F18, F-15 etc.
Big thanks to Steve for the inspiration!
Building materials needed for the plane:
- 6 and 3 mm depron sheets
- 3 mm diameter carbon fibre
- 5 mm diameter carbon fibre tube
- 0.8mm strenght PCB material (used for motor mount, the material is the same your computer motherboard is)
Recommended setup:
- Axi 2212/20 or similar
- largest recommended prop :7"
- 3 mini-servos, ie. HS-55
- at least 4-CH receiver
- LiPo batterys , 80-120g
Measurements:
- Wing span 78cm (30.7 inch).
- Length: 103cm (40.55 in).
- Weight: 340g (12 oz) as shown unpainted.
The control system include 3 servos from which 2 operates the flaperons and one operates elevator and canard
wing in the front, at the same time.(connected with a pushrod)
Flapero movement range +-15 degrees.
Flaperons have been widened 5mm compared to initial model to achieve better roll rate.
Elevator control range +-15 degrees and Canard +-10 degrees.
40% expo used with all control surfaces.
I am not using Flaperons as flaps at the moment , only as ailerons, but no restrictions for flap usage either.
Later on , when the experience has been earned , you may try using higher movement range.
About designing abd building:
In the plans the motor mount is drawn as 10x10mm wooden stick like in GWS models, but every builder can make their own adjustments/designs as they wish.
The motor installation angle should be 4-5 degrees downwards. ALSO there is an option to make moving motor mount connected with elevator so that way you could
achieve "thrust vectorin" for a parkjet. Resulting manouvering capability should be quite exciting. Even now we can make Cobra turns!!
With full control surface deflections manouvering is even without "thrust vectoring" very fast.
Torsional rod is 3mm CF rod installed inside of 5mm CF tube in elevators and canards.
The servo attachment pieces are not drawn, but anyone can desing them their own liking from either depron or balsa.
CG is marked on the picture 3view.gif (between canard and main wing assembly)
The largest reasonably usable propellor is 7" (APC 7x6) , which I used, and I had to even cut some room for that from insides of elevators.
Best regards, Rane
Happy Flying! |
欢迎继续阅读楼主其他信息
|
/1 
发表于 2009-6-18 17:51
收藏
楼主