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-   -   Aileron stop - nylon bushing (https://vansairforce.net/community/showthread.php?t=97182)

Rhino889 03-05-2013 11:27 AM

Aileron stop - nylon bushing
 
I searched and read "aileron stop".

Can't find info:

Source where to purchase?
Diameter?

Thanks guys.

Reading the searches is taking up to much build time ;)

bruceh 03-05-2013 02:32 PM

Quote:

Originally Posted by Rhino889 (Post 750050)
Source where to purchase?

search for Delrin Rod at Aircraft Spruce.

Quote:

Diameter?
You should be able to look at the plans to figure that out. On the RV-9 the correct diameter is 7/8". It might be different on the RV-8. The plans should have a full size drawing of the aileron attachments to extrapolate the necessary diameter to get you down to where the stops are on the brackets.

I followed Smitty's instructions.

I've got a ton of 7/8" delrin rod left over, so if anyone out there wants some...

Don Patrick 03-05-2013 03:02 PM

I have some
 
I just picked up a rod from ACS. I have lots if you want some.

PM me your address and when I'm down in Port CHarlotte next week, I'll send you a couple of inches.

Should be plenty.

Cheers,


Don

DanBaier 03-05-2013 04:34 PM

Believe it or not, the aviation dept at Lowes has this part - cut to size and with a center hole that fits perfectly for the bolt.

It's in the hardware dept in the section where they have the drawers of specialty bolts, etc.

Dan

longranger 03-05-2013 05:05 PM

I was in Mike Bullock's build log (see Van's builder web site list) looking for something else, and ran across his aileron stop page. He used 3/4" nylon. I have no idea how it's held up.

AltonD 03-05-2013 06:19 PM

Quote:

Originally Posted by DanBaier (Post 750181)
Believe it or not, the aviation dept at Lowes has this part - cut to size and with a center hole that fits perfectly for the bolt.

It's in the hardware dept in the section where they have the drawers of specialty bolts, etc.

Dan


Ditto here.

350 hours, always hangar'd. When they wear out, I will spend another $3 and replace them. Acutally, I bought extra when I got these.

Rhino889 03-05-2013 06:33 PM

Dan,

Thank you very much! I'll hit the Lowes tomorrow.

Don,

Thank you very much for the offer. I'm gonna hit the lowes.


Regards,

Scott

Ironflight 03-05-2013 06:57 PM

Quote:

Originally Posted by AltonD (Post 750212)
Ditto here.

350 hours, always hangar'd. When they wear out, I will spend another $3 and replace them. Acutally, I bought extra when I got these.

1610 hours - no wear at all! ;)

Brantel 03-05-2013 08:09 PM

I have these on my plane as well.

My only concern is one day they may dry out or get brittle from UV rays and crack/fall off....

So I keep close eye on them during pre-flight!

One does not want these disappearing especially if you have the typical AP servo installed!

alpinelakespilot2000 03-05-2013 09:06 PM

Quote:

Originally Posted by bruceh (Post 750142)
On the RV-9 the correct diameter is 7/8".

Hi Bruce-
Are you sure you're not getting too much aileron travel with that size delrin rod on the RV-9? Did you test it with both wings on the plane at the same time? (You have to do this because the up travel stop on one wing is the down travel stop on the other and the allowed amount of travel is not the same in both the up and down directions.) I too thought that the delrin rod was going to work when I had just one wing rigged but once both of my wings were on I found that in order to keep both up and down travel limits in spec that the rod had to be so large in diameter that it protruded into the slipstream. I know this method works for the shorter-wing RV's but I haven't yet found anyone with a -9/9A who has used it AND stayed within published aileron travel limits. Anyway, just curious.

bruceh 03-06-2013 12:11 AM

I have both the delrin stops and the tiny angle stops as the plans call out. Sort of a belt and suspenders approach. They both bottom out at the exact same place, so the 7/8" dimensions are correct for the RV-9 wing.

Here is a photo showing both stops hitting the limit.



The wings have been on the fuselage, and all of the preliminary rigging has been done. If ever the delrin should fail, the other stop will be there.

SHIPCHIEF 03-07-2013 09:30 AM

I followed thru on this topic; and got a 4 pack of 3/4" dia. wheels @ LOWES aerospace. (and a 'hit & run' dent in the side of my pickup truck:mad:)
The wheels have roller bearing & threaded axles, so I thru drilled .187 and installed them (plus a washer) in place of the spacer.
28 degrees of up travel is where they stop the aileron. That's about mid way between min and max travel.
This time, I had a magnet on one of those telescoping handles. :D It seems like I drop the washers and nuts at least a dozen times, so that magnet really sped up the process of picking up the bits and trying again.

Brantel 03-07-2013 09:45 AM

Washer wrenches are an airplane builders best friend!

Get em from Avery's:



These things are priceless in a few areas like attaching the control surfaces and the control stick weldment/assembly!

DanBaier 03-07-2013 11:44 AM

Quote:

...a 4 pack of 3/4" dia. wheels ... The wheels have roller bearing & threaded axles...
That wasn't what I used and referred to earlier. In my situation there were no roller bearings etc.

The package label is


You can get them in various lengths - the 1" is


These are 1/2" diameter not 7/8". I don't have the final measurements handy, but after installing these, the aileron travel fell within the Van's guidelines (RV-7). Price for this pkg was $0.92.

Dan

rv8ch 03-07-2013 03:08 PM

0.5" worked for me
 
Here's how I did it:

http://www.rv8.ch/aileron-stops/

Back in the old days we had to buy this stuff from ACS! :)

Rhino889 03-07-2013 05:53 PM



Got me within 1 degree of max travel.

Thanks for the help

Stewie 03-08-2013 09:05 AM

Cool idea! I mostly keep an eye on the -3/-4 forums, but I obviously need to expand my perusing.

bullojm1 03-08-2013 09:51 AM

Quote:

Originally Posted by longranger (Post 750199)
I was in Mike Bullock's build log (see Van's builder web site list) looking for something else, and ran across his aileron stop page. He used 3/4" nylon. I have no idea how it's held up.

I used two nylon spacers from Home Depot in order to achieve a 3/4" OD aileron stop:



After over 100 hours they have held up just fine. Full write up on the stops are here: http://www.rvplane.com/?categoryid=4&dayid=556

o2flymy6 05-05-2013 12:00 PM

Living in the sticks
 
This is the point in my build and I would love to get a set of these 7/8" stops from Lowe's but live in "the sticks". Anybody near a Lowe's that can help-a-fella out and I cover the expenses and a beer for your trouble?

rzbill 05-05-2013 02:40 PM

Quote:

Originally Posted by Brantel (Post 750683)
Washer wrenches are an airplane builders best friend!

Get em from Avery's:



These things are priceless in a few areas like attaching the control surfaces and the control stick weldment/assembly!

AMEN.. It was HARD to peel out the cash because they are a bit pricey but that event is long gone history. I'll still be clutching them in my clammy dead hands when I pass. They are GREAT. :D

Daniel S. 11-24-2013 08:56 AM

RV 7 aileron stop
 
Hey all-
I just wanted to add to the info here. I initially bought the 1/2" X .194 X 1/2" nylon spacers from Lowes. I trimmed them down to the proper length & installed them. Presto!!! I had 31 degrees up travel... 1 degree less than max travel for the -7. I just ordered the same spacers but in aluminum from aluminumspacers.com for final assemble down the road. here is the link.

http://www.aluminiumspacers.com/oute...s50-10-32.html

xblueh2o 11-10-2014 06:20 PM

Slight thread revival.
I was working on putting my wings away before going whole hog at the fuselage when I realized I never completed this one mod.

For those who have done the mod and are now completed and flying, what size OD on the rod did you end up using to get the correct throw for an 8? Also, did you drill the rod to 3/16" for just the bolt or 5/16" for the spacer?

Pman 04-24-2017 06:32 PM

5/8" O.D.
 
I used a 5/8" O.D. spacer on my RV8, it worked perfectly:

Both ailerons up travel = 30 degrees
Both ailerons down travel = 15.5 degrees

Measured with a Digital level.

Hope this may help someone------

Mike p


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