It may have been talked about before, but could anyone advise on fitting instruments to BFP and main instrument panels i.e Spitfire Hurricane etc.
To be more precise which bolts and fittings etc. I have some 2BA countersunk slotted bolts which I was going to use to fit all 6 instruments on the BFP, I wondered if anyone had used these or had they gone for the Metric equivilent, I know that a countersinking drill bit is now metric so the 2BA may not fit correctly.
I also have some 2BA round head bolts, and I think 4BA were also used on panels.
Also on main panels would people go for countersunk or round head ?
Were there any other types and sizes used to fit instruments ? Have seen lots of different ways on pictures of panels.
All advice is useful.
Thanks . Ant. 🙂
By: Worcs Aviation - 19th May 2012 at 21:37
Thanks for all the advice,
Actually have just looked at a broken original BFP part of right side missing, but as Bruce says the centre two are NOT countersunk.
The main panels will be round head screws which will vary dependent on the instruments.
Thanks again.
Ant.:)
By: Worcs Aviation - 19th May 2012 at 21:37
Thanks for all the advice,
Actually have just looked at a broken original BFP part of right side missing, but as Bruce says the centre two are NOT countersunk.
The main panels will be round head screws which will vary dependent on the instruments.
Thanks again.
Ant.:)
By: TerryP - 19th May 2012 at 14:28
As for 2BA or 4BA then it all depends upon the instrument. Most British instruments had captive nuts and of course you should use the appropriate size. I would use slotted round head screws unless, on an original panel, there is an obvious countersinking, or it is defined in the spare parts manual. Generally nickel or cadmium plated steel screws would be used. Except near a magnetic compass where brass screws are essential.
By: TerryP - 19th May 2012 at 14:28
As for 2BA or 4BA then it all depends upon the instrument. Most British instruments had captive nuts and of course you should use the appropriate size. I would use slotted round head screws unless, on an original panel, there is an obvious countersinking, or it is defined in the spare parts manual. Generally nickel or cadmium plated steel screws would be used. Except near a magnetic compass where brass screws are essential.
By: Dave254 - 19th May 2012 at 10:35
angles for countersinks
Countersunk angles are measured by degrees as opposed to different angles for different screws. A quick dip into wikipedia http://en.wikipedia.org/wiki/Countersink) states that both BA and Metric screws are at 90 degrees. So a quick look on the familiar internet trading site should produce a 90 degree countersink. When I fine tuned my BFP I used a 90 degree countersink with 2BA screws and then painted the heads using the humbrol model paints for a satin black finish.
Regards,
Dave
P.S. Apologies to the grammar Police I may have used countersink/countersunk incorrectly but it is not a word I use often!
By: Dave254 - 19th May 2012 at 10:35
angles for countersinks
Countersunk angles are measured by degrees as opposed to different angles for different screws. A quick dip into wikipedia http://en.wikipedia.org/wiki/Countersink) states that both BA and Metric screws are at 90 degrees. So a quick look on the familiar internet trading site should produce a 90 degree countersink. When I fine tuned my BFP I used a 90 degree countersink with 2BA screws and then painted the heads using the humbrol model paints for a satin black finish.
Regards,
Dave
P.S. Apologies to the grammar Police I may have used countersink/countersunk incorrectly but it is not a word I use often!
By: Bruce - 19th May 2012 at 09:03
The centre two (AH and DI) are always fitted with round head screws.
Yes, paint them in black.
Bruce
By: Bruce - 19th May 2012 at 09:03
The centre two (AH and DI) are always fitted with round head screws.
Yes, paint them in black.
Bruce
By: Worcs Aviation - 19th May 2012 at 08:18
Cheers Tony,:)
Probally will do all countersunk on BFP, and as you say main panels are thin so will go for round head.
Would you black the screw heads on the main panels ?
Ant.
By: Worcs Aviation - 19th May 2012 at 08:18
Cheers Tony,:)
Probally will do all countersunk on BFP, and as you say main panels are thin so will go for round head.
Would you black the screw heads on the main panels ?
Ant.
By: Rocketeer - 18th May 2012 at 21:55
Go for BA all the time!! If your counter sink is metric, pick a suitable drill bit instead to fit the BA head. Round heads for the BFP, main panel depends on types. My Hurri uses round heads all the way (main panel is so thin)
Just checking pix, my original BFP has countersunk 2BA on all the inst’s bar AI & DI!!
By: Rocketeer - 18th May 2012 at 21:55
Go for BA all the time!! If your counter sink is metric, pick a suitable drill bit instead to fit the BA head. Round heads for the BFP, main panel depends on types. My Hurri uses round heads all the way (main panel is so thin)
Just checking pix, my original BFP has countersunk 2BA on all the inst’s bar AI & DI!!
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May 18, 2012 at 8:13 pm