jaka

Hi!
Can I substitute the steel wing bolts in Viper kit with nylon bolts?

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yes, remove the blind nuts from under the wing bolt plates - easily done by putting a steel bolt into the blindnut and gently tapping each one out- and then thread the plywood wingmounts with 6mm or similar - trevor h,[:@]nz

jaka

Hi!
Thank's but I don't want to replace the blind nuts, just replace the heavy steel bolts.

Scorpion Racing

Jan,
If you change to a nylon bolt, I would go with 1/4"-20 for the front and a 10-32 or 10-24 for the rear bolts. This is what most Q-600 planes use for the main wing. If you want to still use the blind nuts, I would suggest you switch to an aluminum bolt instead of nylon. You will still save some weight, but the aluminum would give you the extra strenght you will need. I get my stuff from [link=http://www.microfasteners.com/index.cfm]Microfasteners[/link], who seem to have the best prices and the best selection for what we do.

jaka

Hi!
Thank's!
But they don't seem to have flat head aluminium screws (same model as the bolts in the Viper kit)

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you are better off using countersunk heads- go get yourself a countersinking tool The c/sunk bolts sit flush with the top of the wing and allow you to put a piece of clear tape over them. makes forr a nice tidy job. regards trevor henderson[8D]nz

jaka

Hi!
But where to get countersunk , aluminium, wing bolts???

daven

My Feedback: (1)

http://www.microfasteners.com/catalo...cts/MSCFML.cfm

jaka

Hi!
Thank's daven!
But what size is the Viper bolts...You American have so strange bolt sizes.

daven

My Feedback: (1)

Jaka, we think the same about your sizes

Not really sure, since I assume the Viper uses a metric bolt.

jaka

Hi!
Think Viper have inch dimension wing bolts...Yes Inches!

daven

My Feedback: (1)

Well, I'm not positive, but If its an SAE size, I would think it would be one of the following:

8/32
10/24
10/32

Anyone know for sure??

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According to my instruction book the VIPER has 8-32 flat head screws for fixing of both wing and tail- there is a difference in lengthh 4 screws are 38mm long, and 2 are 20 mm- hope this helps trevor hnz