Today's Message Index:
----------------------
1. 01:09 AM - Re: RV9A Stabilizer (Ken Moak)
2. 01:43 AM - Re: RV9A Stabilizer (Warren Smith)
3. 02:15 PM - CHT Probe (Roy Taylor)
4. 04:38 PM - #40 hole sizes (Rob W M Shipley)
5. 10:09 PM - Re: CHT Probe (DThomas773@aol.com)
Message 1
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| Subject: | Re: RV9A Stabilizer |
--> RV9-List message posted by: Ken Moak <ken_moak@yahoo.com>
Depending on who you talk to a 41 or a 40 is right for
3/32 rivet. I have tried both not much difference.
Be sure the bit is really the size you think. I
bought some cheap bits once from Harbor Freight and
they were way off. Cost me about $40 when I drilled a
bolt hole too large and had to remake some parts.
When in doubt measure it with a good pair of calipers.
Vans makes mistakes, but I can tell you I have misread
far more than they have written wrong. Found a lot of
people on the list willing to help. It is a lot
cheaper to ask first.
Good Luck
Ken
Wings 90508
--- Warren Smith <adslf45i@tpg.com.au> wrote:
> --> RV9-List message posted by: "Warren Smith"
> <adslf45i@tpg.com.au>
>
> Hi Guys=0D
> =0D
> Horizontal Stabilizer RV9A=0D
> I don't know if any one else has came across this in
> the manual for the RV9a
> in section 6 /6-2 in paragraph 8 on this page it
> says to match drill the
> skins to the skeletal structure, enlarging the
> prepunched 3/32 inch holes
> to #40, this I think is a mistake as the rivets
> supplied for this are exact
> for the 3/32 hole if they are drilled out to #40 the
> rivets will fall
> straight through the holes, either I'm missing
> something or someone at Van's
> have goofed.=0D
> =0D
> The rivets supplied are: AN426AD3-4.=0D
> =0D
> As I have not drilled these holes as yet and don't
> intend to until this is
> clarified.=0D
> =0D
> Any comment or help in this regard will be most
> appreciated.=0D
> =0D
> Thanks Guys=0D
> =0D
> Warren Smith=0D
> Builder from Sydney, Australia.=0D
> adslf45i@tpg.com.au
>
>
>
> Contributions
> any other
> Forums.
>
> latest messages.
> List members.
>
> http://www.matronics.com/subscription
> http://www.matronics.com/FAQ/RV9-List.htm
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__________________________________
http://sitebuilder.yahoo.com
Message 2
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| Subject: | Re: RV9A Stabilizer |
--> RV9-List message posted by: "Warren Smith" <adslf45i@tpg.com.au>
Hi Ken=0D
=0D
Thanks for that help this is why I asked first as there are many builders
out there with more experience in building then me I'm still learning. The
#30 drills are readily available here in Australia but the #40s are only
available from a couple of suppliers so I have been informed.=0D
=0D
Once again thank guys for your invaluable help.=0D
=0D
Cheers=0D
Warren Smith=0D
RV9A builder=0D
Sydney Australia.=0D
=0D
-------Original Message-------=0D
=0D
From: rv9-list@matronics.com=0D
Subject: Re: RV9-List: RV9A Stabilizer=0D
=0D
--> RV9-List message posted by: Ken Moak <ken_moak@yahoo.com>=0D
=0D
Depending on who you talk to a 41 or a 40 is right for=0D
3/32 rivet. I have tried both not much difference.=0D
Be sure the bit is really the size you think. I=0D
bought some cheap bits once from Harbor Freight and=0D
they were way off. Cost me about $40 when I drilled a=0D
bolt hole too large and had to remake some parts.=0D
When in doubt measure it with a good pair of calipers.=0D
=0D
Vans makes mistakes, but I can tell you I have misread=0D
far more than they have written wrong. Found a lot of=0D
people on the list willing to help. It is a lot=0D
cheaper to ask first.=0D
=0D
Good Luck=0D
=0D
Ken=0D
Wings 90508=0D
=0D
=0D
--- Warren Smith <adslf45i@tpg.com.au> wrote:=0D
> --> RV9-List message posted by: "Warren Smith"=0D
> <adslf45i@tpg.com.au>=0D
>=0D
> Hi Guys0D=0D
> 0D=0D
> Horizontal Stabilizer RV9A0D=0D
> I don't know if any one else has came across this in=0D
> the manual for the RV9a=0D
> in section 6 /6-2 in paragraph 8 on this page it=0D
> says to match drill the=0D
> skins to the skeletal structure, enlarging the=0D
> prepunched 3/32 inch holes=0D
> to #40, this I think is a mistake as the rivets=0D
> supplied for this are exact=0D
> for the 3/32 hole if they are drilled out to #40 the=0D
> rivets will fall=0D
> straight through the holes, either I'm missing=0D
> something or someone at Van's=0D
> have goofed.0D=0D
> 0D=0D
> The rivets supplied are: AN426AD3-4.0D=0D
> 0D=0D
> As I have not drilled these holes as yet and don't=0D
> intend to until this is=0D
> clarified.0D=0D
> 0D=0D
> Any comment or help in this regard will be most=0D
> appreciated.0D=0D
> 0D=0D
> Thanks Guys0D=0D
> 0D=0D
> Warren Smith0D=0D
> Builder from Sydney, Australia.0D=0D
> adslf45i@tpg.com.au=0D
>=0D
>=0D
>=0D
> Contributions=0D
> any other=0D
> Forums.=0D
>=0D
> latest messages.=0D
> List members.=0D
>=0D
> http://www.matronics.com/subscription=0D
> http://www.matronics.com/FAQ/RV9-List.htm=0D
> http://www.matronics.com/archives=0D
> http://www.matronics.com/photoshare=0D
> http://www.matronics.com/emaillists=0D
>=0D
>=0D
>=0D
>=0D
>=0D
=0D
=0D
__________________________________=0D
http://sitebuilder.yahoo.com=0D
=0D
=0D
=0D
=0D
=0D
=0D
=0D
=2E
Message 3
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--> RV9-List message posted by: "Roy Taylor" <Royandjilly@btinternet.com>
I expect this has been discussed before....the Lycoming Reprints book that comes
with the engine says "..most GA aircraft take the CHT off the hottest cylinder
of the four..." (page 50). Those of you flying, if still reading this site,
will have a view on which cylinder that's likely to be...assuming you've got
4 CHT's. I'm only fitting one, so which one is it?
Roy, G-RUVY. FWF at last.
Message 4
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--> RV9-List message posted by: "Rob W M Shipley" <rob@robsglass.com>
--> RV9-List message posted by: Sargentclt@cs.com
Great news You are not alone. As I began building my RV7A which is similar
to the RV9 I went through the same doubts as you. Just remember all the holes
Van has drilled are one size too small
by one size. Example the #40 hole you are to drill is actually a #41.
Another reminder for me is the larger the number on the drill bit the small the
The prepunched holes are not #41 - they are smaller. I was cautioned by my technical
adviser for having holes too loose using the recommended Vans method.
Being sceptical of this advice I researched the Mil Spec requirements and indeed
he was correct. The recommended practices I found specified holes to be no
more than .003 oversize. Unfortunately using a #40 drill and a #40 dimple die
gives you holes with far more clearance - .008 to .011 depending on the skin
thickness you're dimpling. I switched to using a #41 drill bit for the skins
in order to get tighter tolerances - about .005.
Does any of this matter? Probably not. As Van's tell you "Build the way we tell
you and you'll have a fine plane". It's very hard to argue with Van's track
record and bear in mind that you can't buy a #41 dimpler which is probably what
is required to meet the .003 tolerances, so every builder has the same holes
you will.
Good luck and fly safe.
Rob
Rob W M Shipley
RV9A N919RV (res) Fuselage
Message 5
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--> RV9-List message posted by: DThomas773@aol.com
Hi Roy,
I'm not an engine guy but I think it is the one closest to the firewall.
Dennis Thomas
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