Posted: 2/21/2011 13:09:36
I am looking for an economical 12volt hydraulic pump to power my landing gear. I currently have an old hand pump that has seen its share of use and is not functioning well. I would be interested if someone knows a good source for a electric pump or a new hand pump.
Posted: 2/22/2011 11:41:57
Look at the marine industry. The pump used by many kitplane manufacturers is the same as is used by Mercruiser to raise and lower the out drive.
Posted: 2/22/2011 23:11:46
There is a small but powerful 12 volt pump that was used in the old Chevy Citation convertible. If you go on ebay you will find some. They have a small reservoir, but they work well. I used one on my test stand for my prototype landing gear. There is video on my website.
Posted: 2/24/2011 20:57:36
Looks like a Coot. The one I built had a screw drive, but not according to plans. You may consider using one from a marine drive. as one suggested. Piper uses them (and has for a long time) in their retracts, such as the Arroes They are small, light, and powerful.