Rhom Air Retracts - RCCanada - Canada Radio Controlled Hobby Forum
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Old 10-14-2009, 01:00 PM   #1
ace mcfee
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Rhom Air Retracts

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Recently I acquired a Dave Platt Focke Wulfe with Rhom Air retracts. I suspect the retracts are about 30 years old. The system is not holding pressure so I opened up the bottom of the wing to find the leak(s). Everything looks okay and the lines look good. But there is a gush of air from the control valve when I cycle the gear that drains the cylinder which is not very large. It might be the the 4-way control valve needs to be serviced or replaced. I heard that this was a weak point with the Rhom Air system and some guys have replaced the control with a Roberts valve. I would like to keep the Rhom retracts if I can get them operating properly. I really know very little about Rhom retracts and a manual would be very useful, particularly for servicing the system. Any ideas or suggestions would be very helpful.


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Old 10-14-2009, 02:49 PM   #2
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Re: Rhom Air Retracts

I have the same plane and retracts.There is no service manual for the gear. I put some airline oil in the lines to keep things smooth and seald. The rubber O rings could have dried up on the air valve or you have to much travel in one direction of the valve and all the air is escaping.If the airlines are old, replace them.

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Old 10-14-2009, 06:46 PM   #3
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Re: Rhom Air Retracts

Liquid silicone is a good idea for any routine maintainence on any retract system, keeps the O rings etc hydrated. Silicone will not attack the rubber O rings.....ron
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Old 10-14-2009, 06:50 PM   #4
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Re: Rhom Air Retracts

Air tool oil, a couple of drops in the system and it should solve your problem.
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Old 10-15-2009, 08:27 AM   #5
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Re: Rhom Air Retracts

Originally Posted by pep View Post
Air tool oil, a couple of drops in the system and it should solve your problem.
I agree, but ace mcfee should still consider replacing the vlve with a newer, more modern one
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