KitLog pro

Powered By Kitlog Pro v2.0

Barracuda
' style=
Date:  10-4-2008
Number of Hours:  8.00
Manual Reference:  
Brief Description:  secondary gear door rams

The ram model finally choosen was a Tom Thumb HVP3/4x4 with port control on both ends. I origionally wanted a spring return on the door as a back up for hydrulic failure - but the lenght of the ram (with spring) would cause the mounting location/angle to be too shallow . Had that angle been used the ram would put tension on the root rib and hinges essensially pulling the door from its mount . The gear - when lowered simply push the door away anyway without effort. The current mounting location provided a better angle to seat the door and provide a positive hold. I cycled the door /ram over 100 times with 150 psi of air pressure using an air switch . The concept works fine and the port control on the cylinder are excellent in providing a smoth slam free operation no matter the operating pressure.

I did note some minor flexing at the root rib . I had followed the jeffair drawing for the most part . In that scheme two hard points were added to the root rib inboard . These hard points will be extended - the aft hard point will be extended to each cap strip and the a 3/32 birch ply doubler added . The forward hard point will be extended aft - from spar to seat pan web stiffener with ply doubler added also.

The mounts I made for the rams are very similar to the gear mount design in the plans 4130 plate and tube with a nas shear bolt welded in from the back side and dressed flush. I did not weld in gussets ( mostly because my plasma cutter is down ) - I really didnt think I would need them . Again there was noted flex very slight but still there. Gussetts will be added to the mounts.
' style=





' style=




' style=




' style=










Copyright © 2001-2024 Matronics. All Rights Reserved.