Err... my three incentives are actually like the three musketeers.
Actually, there are 4 of them.
And that should be 0.0185, not 0..0185, I guess.
Incidentally, I am told that cadmium plating is banned in Europe (or will
be soon, I'm not too sure), on environmental grounds.
Sorry for the mistakes, guys, it has been a long day.
Serge
Serge VIDAL <serge.vi...@sagem.com>
Envoyé par : krnet-boun...@mylist.net
2005-11-16 19:31
Veuillez répondre à KRnet
Remis le : 2005-11-16 19:32
Pour : KRnet <kr...@mylist.net>
cc : (ccc : Serge VIDAL/DNSA/SAGEM)
Objet : Réf. : Re: Réf. : Re: KR> Main landing gears - Drilling through
spring
steel
OK, let's see. The closest AN size would then be AN6, which is 9.53mm
instead of 10mm. That is a .47mm difference, which is 0..0185 inch.
Considering that the current bolts are threaded all along, whereas the new
ones would have a slick shank at the grip... OK, I'll buy it.
That makes me think that maybe I should apply the same reasoning to the
bolts that hold the engine mount to the firewall, since these are M-10
(10mm) too .
My three incentives for using AN bolts instead of metric are:
1 - Can't find any metric aircraft bolts around here;
2 - Can't find standard, hardware quality bolts with an unthreaded shank
either;
3 - Can't find cadmium-plated harware quality bolts;
4- Importing aircraft grade bolts from the US costs me less than buying
standard grade bolts from the hardware shop, even taking into account
transport and duties.
Go figure!
Serge Vidal
KR2 "Kilimanjaro Cloud"
Paris, France
Matthew Elder <eldo...@yahoo.com>
Envoyé par : krnet-bounces+serge.vidal=sagem....@mylist.net
2005-11-16 18:38
Veuillez répondre à KRnet
Remis le : 2005-11-16 18:38
Pour : KRnet <kr...@mylist.net>
cc : (ccc : Serge VIDAL/DNSA/SAGEM)
Objet : Re: Réf. : Re: KR> Main landing gears - Drilling through
spring steel
No.. Not at all.
The clamp load generated by the bolts is what holds the joint together.
I mean, when you get it all bolted down to the proper torque, it's not
going to slide around any more than if it was a .001" clearance.
Matt
Serge VIDAL <serge.vi...@sagem.com> wrote: Yep, I thought of that, but
don't you think that .5mm is too much gap?
My gear brackets are made of cast aluminum, and my fear is that if the
legs are not tightly fit, then maybe that may induce some cracks.
Then, again, I am fairly ignorant as far as metal work is concened.
Serge
Matthew Elder
Envoyé par : krnet-boun...@mylist.net
2005-11-16 15:55
Veuillez répondre à KRnet
Remis le : 2005-11-16 15:57
Pour : KRnet
cc : (ccc : Serge VIDAL/DNSA/SAGEM)
Objet : Re: KR> Main landing gears - Drilling through spring steel
Maybe a silly question, but wouldn't you be better off just using an AN-6
(3/8) fastener? The holes would already be oversized about .5mm (around
.020").
Then you wouldn't have to drill.
Just a thought.
Matt
Serge VIDAL wrote: This is one is for steel
specialists:
My taildragger KR2 main landing gear legs are made of spring steel. They
hold to the gear brackets by 4 bolts each. The bolts are metric, 10mm
diameter.
I would like to change that for the nearest AN size. That would be an AN7,
which is 7/16", that is 11.11mm. So I would have to enlarge the holes.
Now, I don't know much about steel, but I know by experience that it is
very hard to drill through these legs, since 3 years ago, I tried to drill
a couple of tiny holes to hold some brackets for the brakes lines, and I
gave up.
Questions, then: what are my chances to succeed, what kind of drill bits
should I use, and what is the correct drilling technique?
Serge Vidal
KR2 "Kilimanjaro Cloud"
Paris, France
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-------------------------------------------------
Matthew Elder
Orangeburg, SC
http://www.infinigral.com/melder
My Airplane Project:
http://www.infinigral.com/melder/flying/KR1/
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-------------------------------------------------
Matthew Elder
Orangeburg, SC
http://www.infinigral.com/melder
My Airplane Project:
http://www.infinigral.com/melder/flying/KR1/
_______________________________________
Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp
to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net
please see other KRnet info at http://www.krnet.org/info.html
_______________________________________
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