Spitfire fixings
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Joined: Apr 2006
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From: East Anglia
Spitfire fixings
Having watched 'Guy Martin's Spitfire', I've 3 questions re: the fastenings used.
a. How are the different coloured 'place holders'(?) used and what is the significance of the different colours?
b. I noticed that the rivets used were similar to ones I found amongst my grandfather's* tools, they appeared to be of anodised metal and different colours. Were the colours linked to the above?
c. I understood what the definition of "FT" is when securing the propeller
but did 'they' use torque settings for the building of the aircraft apart from the maintenance of the Merlin?
Any comments gratefully welcome!
FZ
* My grandfather was a General Manager of a firm building Halifax wings and engine nascelles(sp?) in WW2.
a. How are the different coloured 'place holders'(?) used and what is the significance of the different colours?
b. I noticed that the rivets used were similar to ones I found amongst my grandfather's* tools, they appeared to be of anodised metal and different colours. Were the colours linked to the above?
c. I understood what the definition of "FT" is when securing the propeller
but did 'they' use torque settings for the building of the aircraft apart from the maintenance of the Merlin?Any comments gratefully welcome!
FZ
* My grandfather was a General Manager of a firm building Halifax wings and engine nascelles(sp?) in WW2.
Joined: Feb 2002
Aviation Qualifications: AME
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From: UK
The place holders are skin pins. The different colours are for different sizes. 3/8 5/16 1/4 etc.
The colouring of rivets is related to the type of material. (and heat treatment in some cases I think)
Torque settings of all major component nuts and bolts would be normal procedure.
The colouring of rivets is related to the type of material. (and heat treatment in some cases I think)
Torque settings of all major component nuts and bolts would be normal procedure.
Joined: Feb 2006
Aviation Qualifications: LAME
Posts: 36,137
Likes: 5,738
From: Falling off the end of the thread
Cough cough... Turin your sizes are a tad out..
The common ones are (skin pins are the same as gripper pins)
The red gripper pins are 3/32 in size
The yellow gripper pins are 1/8 in size
The blue ones are 5/32 in size
The black ones are 3/16 in size
There are also 7/64 which is brown, 7/32 which is green and 1/4 which is white.
You also have cleco pins that do the same thing but are anodised, see
http://www.skinpins.com/catalog/prod...leco-type-p-19
Basically you drill your rivet holes to the sizes mentioned above, the pins slot through and is used to pull the skins together and hold it while drilling other holes, you then use it to hold the skins while rivetting it together, it consists of two legs that add up to the diameter of the hole, one leg which is longer moves up and down in the middle and has a knurled nut on to tighten it, it also has a bulge on the other end, so when you pull that leg through and tighten it, it increases the diameter along with the other leg, so grips the skins together, does that make sense?
Rivet colours see
http://forum.keypublishing.com/showt...gnesium-rivets
.
The common ones are (skin pins are the same as gripper pins)
The red gripper pins are 3/32 in size
The yellow gripper pins are 1/8 in size
The blue ones are 5/32 in size
The black ones are 3/16 in size
There are also 7/64 which is brown, 7/32 which is green and 1/4 which is white.
You also have cleco pins that do the same thing but are anodised, see
http://www.skinpins.com/catalog/prod...leco-type-p-19
Basically you drill your rivet holes to the sizes mentioned above, the pins slot through and is used to pull the skins together and hold it while drilling other holes, you then use it to hold the skins while rivetting it together, it consists of two legs that add up to the diameter of the hole, one leg which is longer moves up and down in the middle and has a knurled nut on to tighten it, it also has a bulge on the other end, so when you pull that leg through and tighten it, it increases the diameter along with the other leg, so grips the skins together, does that make sense?
Rivet colours see
http://forum.keypublishing.com/showt...gnesium-rivets
.
Last edited by NutLoose; 21st October 2014 at 17:58.
