I have been using this type of actuator in industry for years. The FA35 series I never had any luck with. They use plastic gearing and if you over torque them, you will take out the main gear.
I have been using the Duff Norton LT-255 series now for 5 or 6 years. I have about 150 units in use. Never had one problem. They run about $125 retail. Just my $0.02 worth Bill Wood Technical Consultant/R&D (EXT-262) Guspro (Ice King) Guspro Inc., Chatham, ON PH: 1-888-648-7776 / FX: 1-800-667-8742 ----- Original Message ----- From: "bjoenunley via KRnet" <krnet at list.krnet.org<mailto:krnet at list.krnet.org>> > At an actuation rate of 12mm or .472 inches per second it will take > approximately 12 seconds for the belly board to fully extend. > > Is that fast enough? The faster an actuator extends is better. The reasoning being this is that the retract time will be the same. If you are on approach and have the belly board fully extended and you need to do a go around or touch and go then you want the board to retract as fast as possible. The actuator I have on my belly board is the Van's RV flap actuator. It extends and retracts in 7 seconds. I have actually done a takeoff with the board fully extended. It was a very slow climb out to say the least but it can be done. I do not suggest you buy the Van's actuator because they cost $380.00 now. I think I paid $280.00 for mine back in 2004. Take a look at this link and do a search on part number: FA-35-S-12-6 6" stroke Hi-Speed 35 lbs force List Price: $129.99 Our Price: $118.99 http://www.e-motionllc.com/?gclid=CN_hxM2FxpkCFSQMDQodHipruw These look very similar to the one I have from Van's. Mark Jones (N886MJ) Stevens Point, WI E-mail: flykr2s at charter.net<mailto:flykr2s at charter.net> Web: www.flykr2s.com<http://www.flykr2s.com>
