Sheesh! Who does this Perkins guy think he is? Some multi-time WC or something. By his comment's you would think that he's won more WC's than JW! OH, he has huh<G>?! Daryl is absoutely correct. Another reason could be lack of servo torque. As the load grows on launch, some servos don't have enough umph to maintain position. Only high quality, strong torquey servos will hold their position. Thats the reason I've gone to MPX digital servos after seeing another popular brand servo move up and downduring launch. gv >I know of no model where the launch set-up is correct all the way up tow. > >I also suspect there are other things going on with your model - unstiff >tailboom, poor/unstiff elevator linkage, lack of torsional >stiffness on the stabs, and even maybe the wings. Just my humble opinion. > >Daryl - gimme mo launch - Perkins > >Peter Williams wrote: > > > Hi Guys > > I put about an hour on a new F3B ship today, ( Millenium) and wonder >if > > anyone has some comments regarding setting up for optimum launches. > > > > The model I have pulls fairly well in the latter part of the launch >but > > doesn't rotate quickly out of my hand and uses up a lot of line with not > > much tension during the first part of the launch. The dive test shows an > > aeroplane with a very slight inclination to tuck but nothing >unmanageable, I > > tried moving the hook even going 1/2"behind the CG and using more >launch > > camber however still the same limp slow rotation. I guessed that more > > elevator preset would help (using no elevator preset till now) (i.e. >more > > incidence when the speed is highest out of the hand producing a nose up > > pitch) and this mostly produces pop offs, maybe moving the hook forward >as > > well may have solved this. > > > > I am always impressed with Calypso Cobras, they rotate and pull really >well, > > you know the kind of eye popping rotation and vertical climb from the > > launch, what are the secrets here. > > > > Anyway does anyone have a good appreciation of the > > mechanics/aerodynamics involved that can give an insight into the setup > > process they use and what forces etc are involved. > > > > Thanks in advance for any brave takers............ > > > > Peter Williams > > > > RCSE-List facilities provided by Model Airplane News. Send "subscribe" >and "unsubscribe" requests to [EMAIL PROTECTED] > >RCSE-List facilities provided by Model Airplane News. Send "subscribe" and >"unsubscribe" requests to [EMAIL PROTECTED] ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
