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Spring Air Retract Identification

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Old 08-25-2010, 04:17 PM
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sneakywrist
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Default Spring Air Retract Identification

Hi all, I recently purchased an ARC plane that came with Spring Air Retracts with landing gear and wheels. I tried calling Spring Air but no answer yet. The only identifying marks on the retracts are "Spring Air INC., Pat#4337912. Can anyone help me identify the correct series of retract. Also, I need to know what other items will I need to purchase to make this work...I have experience with mech retracts only...please help
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Old 08-25-2010, 05:04 PM
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DavidAgar
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Default RE: Spring Air Retract Identification

You are going to need an air valve, air tank, fill valve and tubing. The valve needs to be one that has only one port as the gears are spring loaded down and need air to hold them up. From reading the boards here on RCU, Spring Air does awnser questions, but it can take a while. You can use Robart air tanks and fill valves as well as tubing. You can also use the control valve that they make for their air up retracts. Good Luck, Dave
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Old 08-25-2010, 08:01 PM
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Default RE: Spring Air Retract Identification

A picture with a ruler next to it would be helpful. Most of mine are spring-air. What size plane were they in and what size strut does it use?
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Old 08-25-2010, 09:39 PM
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Default RE: Spring Air Retract Identification

Thx for helping; The retracts are for an Ultra Sport 1000. The landing gear wire is 3/16. I will upload pix in a few computer is acting up
The total length is 3 1/8, the base is 1 1/2 and the base width is 1 3/4.
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Old 08-26-2010, 06:53 AM
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Default RE: Spring Air Retract Identification

It is probably the 100 series. Looks like 106HD. A pretty common retract.
http://www.retracts.com/Retrax_100.htm

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Old 08-26-2010, 08:50 PM
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Default RE: Spring Air Retract Identification

should be bigger than the 100 size. i use the 202 size for 60 size pattern planes. the US 1000 is a lot bigger plane.
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Old 08-26-2010, 09:20 PM
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Default RE: Spring Air Retract Identification

What is the advantage of using OLEO struts instead of 3/16 wire gear?
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Old 08-26-2010, 09:27 PM
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Default RE: Spring Air Retract Identification

I dont know that theres an advantage. More asthetics than anything else, at least to me. How much does your US1000 weigh? I've used the 106hd on 14lb cmp spitfires. You can use oleos on the ones you have just by using a 3/16" pin (about 2" long). The oleo would need to have a plug setup for 3/16" with set screws to hold it. I did that so it would act as a fuse, sorta. The 3/16" rod would bend instead of taking out the whole retract mount. Spring-air also sells retracts strut ready. I've used those too. Your call.
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Old 08-26-2010, 09:55 PM
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Default RE: Spring Air Retract Identification

What Air Control Kit should I use, Spring Air or Robart? IYO..... The plane is built just not covered yet maybe I should just go with the wire landing gear and save the headache.....
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Old 08-27-2010, 06:51 AM
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Default RE: Spring Air Retract Identification

I use a mixture of parts, spring-air and robart. I prefer the spring-air fill valve and air control valve for simplicity and reliability, even on the robart (spring-air copy's). Thats just for air up spring down. I use the robart air tanks cause I like them a little bigger than what spring-air sells, more cycles. On the robart, rohm air, and others, air up air down, I still like to use the spring-air fill valve due to reliability. Just my preference. And I dont have to have a bunch of different fill valves for my pump. Air line and fittings can come from anyplace. I use a cheap electric air pump from harbor freight, $15. You make a fill adapter by getting a ball fill needle and cutting the end off. Stick that in some air line (about a foot) then put your favorite fill valve fitting on the end. Pump up to about 120psi. Make sure everything is serviceable. Dont seal anything up. You will need to get to it. I would highly suggest you test the system on the bench first. Then disassemble and install. If the gear has never worked mounted in the wing, watchout for slow operation or sticking and jamming. That would mean the mount is not true and the retract frame is torqed. There are a lot of ways to fix that.
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Old 08-27-2010, 09:37 PM
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Default RE: Spring Air Retract Identification

Usefull info, thx Edwin....do you still have your Rascal 110?
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Old 08-28-2010, 08:04 AM
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Default RE: Spring Air Retract Identification

Oh yes. My favorite plane. Had it for about 9 years now. Its on its 3rd covering job. Going to the clubs big bird today along with the sig Sun Dancer.
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Old 08-28-2010, 09:15 PM
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Default RE: Spring Air Retract Identification

Thought so....you gave me alot of info when I was putting mines together....what a great plane.
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