standard and metric rant!

[Ohio AV8TOR]

Is this the one I got from you? Did you fix it, cause I've been using M3's in them without any problems. I have to take the stabs off every time I transport.

Yes I did because it drove me crazy. You will see that access hatch that was there in the back. It was not easy but all was well after I switched it out.

 

[Av8r RC]

What is the size of the nylon bolts for SFG and wing tips on the 92" Edge. I hate the flat head nylon screws...metric or english.. After installing only 2 times ...I am done with the impossible flat head..

I use a button head M3 x 20mm (I believe) with a #2 bonded washer for the canopy bolts. And some regular M3 socket head cap bolts for the sfgs. Unfortunately the counter bore in the wing tips is a hair too small for a washer. I hate having just a screw holding something on.

Gyro, I'll have to check those out sometime.

There is also this option. http://www.mcmaster.com/#press-fit-thumb-screw-heads/=qshaqh
Similar to the ones Gyro linked. Just a cap that presses onto a socket head cap screw. I was able to find some of these at a local hardware store that stocks a lot of screws, but only in standard size.

 

[gyro]

Sold out at the moment, but much better: http://www.extremeflightrc.com/store/index.php?main_page=product_info&cPath=7_9&products_id=158

back in stock, just ordered a few

 

[Enterprise]

I have a servo box full of those EF thumb screws. Patrick found this alternative and ordered a assortment for those other sizes, mainly 4-40 that 3DHS seems to use. They are press on, and best done with a drill press.

http://www.essentracomponents.com/product/slk-5r/2200014/pg/10?aitm=slk-5r&cls=2200014&pg=10

 

[Yowzilla]

I found a perfect screw for the wing tips on the 3DHS 92" EDGE. The screws that come with SAVOX servos have a huge head on them fit perfect in the wing tip holes. The only negative is that they are metal screws that can be victim to vibration where the nylon seam to deform a bit and hold. Not sure if i forgot to tighten or vibration got one but my left wing tip twisted up so I landed. The SAVOX screw was still in the tip!! I like how they maximize the contact area.

I will let you guys know how they work in long term...

 

[gyro]

I found a perfect screw for the wing tips on the 3DHS 92" EDGE. The screws that come with SAVOX servos have a huge head on them fit perfect in the wing tip holes. The only negative is that they are metal screws that can be victim to vibration where the nylon seam to deform a bit and hold. Not sure if i forgot to tighten or vibration got one but my left wing tip twisted up so I landed. The SAVOX screw was still in the tip!! I like how they maximize the contact area.

I will let you guys know how they work in long term...

View attachment 21863

I've used them before on a SFG that I didn't remove... Worked perfect with some loctite.

To help keep them on, a small neoprene washer might work to stop them from vibrating loose.
I've got A LOT of these

 

[Ohio AV8TOR]

Bonded washers are perfect for a metal screw that won't back out.

 

[gyro]

Bonded washers are perfect for a metal screw that won't back out.

Since the bolt head is so wide on these, I like the loose washer itself versus the bonded. Forgot they're rubber not neoprene:

http://www.trimcraftaviationrc.com/index.php?_a=product&product_id=397

 

[Yowzilla]

Bonded washers are perfect for a metal screw that won't back out.

Bonded washers I have won't fit in this specigic application. I use bonded washers on cowl screws and other areas. Thanks.

 

[bbrown2828]

I have a servo box full of those EF thumb screws. Patrick found this alternative and ordered a assortment for those other sizes, mainly 4-40 that 3DHS seems to use. They are press on, and best done with a drill press.



http://www.essentracomponents.com/product/slk-5r/2200014/pg/10?aitm=slk-5r&cls=2200014&pg=10

so which one fits a 4-40 bolt