Aug 11, 2009, 09:05 AM
Joined Aug 2009
Electric C/L cv-22 osprey
I am currntly working on a cv-22 for control line, mainly because someone said it couldn't be done.
specs so far:
lenght OA 29"
power source 2X turnigy 35-36c 1100kv brushless
esc's turnigy plush 30A X 2
Lipo 1x 3s 20c 4000Mah
props 2 x apc E 10x5
the fuselage is carved from blue foam as are the engine nacelles. The wing is built up with 1/8 lightply ribs sheeted in 1/64 ply
motor pods are at each end of an 8mm carbon tube the tube sits on the cg and counter weights are fitted in the nacelles so that the cg stays the same whether in hover or forward flight.
The engine nacelles witll rotate through 95 degrees and will be operated by a 15kg metal geared servo in the wing (About this time you are thinking hey this is a C/L forum) have no fear all will be revealed.) Flaps will be linked into the rotate servo and will have 90 degrees of movement.
Ok about this servo! I use a control system which incorporated a handle for operating the elevator via a bellcrank and a R/C coder and decoder for up to 6 additional controls.
Basically I tore the guts out of a futaba challenger TX and located the point where the signal passes to the radio frequency section. This point is connected to one of my two insulated 28lb pike wirew control lines the other is linked to the battery earth .At the other end I use a sanwa rx wth the 'signal' control line attached to the point where it bypasses the rf and feeds directly to the decoder again the other line is attached to battery earth
( I think it may be worth making a separale thread for this)
Anyway thats how I can operate speed controllers , servos etc in my scale models
In fact the system works so well that it has helped me win the UK F4b scale championship for 2007 and 2008.
Before I bang on any more if anyone is interested in the project to see if it flys or crashes and burns let us know, otherwise I'm just typing this for myself