Joe Westrich

My Feedback: (95)

I have used a few of them and find that I tend to have the most confidence with the robart units. The only issue is that they only come in large 3/8 diameter and it seems a bit much putting them on some of the small doors. I have used ultra precision but have found out that any side load on the cylinder will make it leak. It was rubbing against an air line. The BVM are compact and light but I don't like the plastic plunger. I have seen the metal shaft strip out of the plastic plunger. I have no experience with airpower cylinders. They seem inexpensive and look like they are built well, but I really don't know about their reliability.

Any opinions?

Terry Holston

My Feedback: (1)

I use the BVM cylinders and make my own Aluminum ends for them. Never had the shaft come out of the plunger, just had the plastic end with the attachment hole break.

LGM Graphix

My Feedback: (22)

The ones Jet Model Products sell are a bit bigger, but they are IMO the best. Never had an issue with one of them.

jeff sewell

My Feedback: (1)

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Mark Vandervelden

There should not be any side loads on a ram if your carful with there install, sometimes a side stop on the cylinder, not the rod solves the problem. UP rams are very good, what travel are you looking for?, Jetlegends own rams are also very good and are smaller in dia with end air feed which is often very handy, there also less expensive than most of similar quality.

Alex48

+1 for UP rams.

Joe Westrich

My Feedback: (95)

UP cylinders have been my choice in the past. If you take your finger and lightly push on them when they are installed, they will leak. I'm not saying others won't but the robart cylinders are hard to make leak with side pressure. In my specific situation, a group of airlines dropped down in between the space between the cylinder and wood it was mounted on. This caused enough pressure to make a leak. Correctly so, if everything was as it should, they should be fine. I am just looking for the most robust install possible.

As of right now, I still plan on using UP cylinders because of the their size and fitting placement, but I was just curious if anyone had good or bad things to say about airpower cylinders or anything else out there.

Thanks for the input

Joe Westrich

My Feedback: (95)

I think the JMP cylinder are a decent size but I wish the fittings were pointed back like the UP and airpower cylinders

mr_matt

My Feedback: (10)

Hi Joe,

I have used UP forever so that is good feedback. What about the design do you think is causing the leakage (more so than other designs)? Is it the relativity thin shaft? that is all I can think of. I have never had a problem but in all likelihood I have never had the side load.

invertmast

My Feedback: (23)

Its probably not a bad design of the UP rod, just manufacturing tolerances of rod they use.

Gary Jefferson

My Feedback: (167)

Joe, I think the fittings are just soldered in place. Call JMP and ask Tom if he can make some with the fittings reversed. I have had the same issue with the side loading on the other cylinders. Like you, I prefer as robust a setup as possible and I agree with Jeremy that the JMP cylinders are the best. Tom makes the best of everything you can buy for RC Jets and the cylinder price is almost identical to the rest.

Shaun Evans

Hi,

I've used Robart, AP, BVM, FEJ and a few other no-name brands and the ones with the least leaks over the longest time were the Yellow Aircraft ones hands-down.

jeff sewell

My Feedback: (1)

There's a surprise....

lov2flyrc

My Feedback: (24)

I have been working with Tom (JMP) to develop a range of high quality cylinders made right here in USA. .5" to 4" in half inch stroke increments will be available. Should be in stock in just a few weeks, in production now.

invertmast

My Feedback: (23)

Fantatstic! What kind of cylinder diameters?

Joe Westrich

My Feedback: (95)

Sounds interesting. Any pictures? How do the fittings face?

Shaun Evans

Hi,

If you say so. Not as surprised as I was when the JL MiG-29 had leaky cylinders, lol. But anyway, if the Y/A cylinders weren't the most reliable ones I've used, I'd put the ones that were the best in my planes. I don't have to say the Y/A were the best ones because I used to be a rep for Y/A. Don't be simple.

grbaker

My Feedback: (29)

I have had good luck with air cylinders from JMP and Yellow Aircraft. Others....not so much.

lov2flyrc

My Feedback: (24)

Batch in production now are 3/8" Diameter.

essyou35

My Feedback: (11)

I've had sucess desoldering the nipples and rotating them. The skymaster ones i have also leak with a sideload, so looking for replacement as well, good info here.

Randy M.

My Feedback: (38)

I hope so. I just received mine and installed several so far. Dang F18 has 10 doors. But only 9 have cylinders