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Dick Sipp
Joined: 11 Jan 2006
Posts: 215
Location: Hope, MI
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 Posted: Fri Apr 28, 2006 5:42 pm Post subject: cowling alignment |
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On the earlier RV models it was common to align the cowling so that the top edge of the forward cowling was 1/8" or so lower than the prop spinner. The theory was that the engine would settle about that amount in operation and "sag" into good alignment.
Of those flying, did any of you do this? If not have you noticed and settling of the engine in the early operations?
Like many subjects there was always a good bit of debate about whether or not this settling happened and if the technique worked or was necessary.
Thanks
Dick Sipp
40065
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Tim(at)MyRV10.com
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| Posted: Fri Apr 28, 2006 6:36 pm Post subject: cowling alignment |
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I did this. With just over 60 hours it hasn't had time to settle yet.
I've pretty much consistently heard it will happen though.
Tim Olson - RV-10 N104CD - Flying
do not archive
Richard Sipp wrote:
| Quote: | On the earlier RV models it was common to align the cowling so that the
top edge of the forward cowling was 1/8" or so lower than the prop
spinner. The theory was that the engine would settle about that amount
in operation and "sag" into good alignment.
Of those flying, did any of you do this? If not have you noticed and
settling of the engine in the early operations?
Like many subjects there was always a good bit of debate about whether
or not this settling happened and if the technique worked or was necessary.
Thanks
Dick Sipp
40065
|
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dlm46007(at)cox.net
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| Posted: Fri Apr 28, 2006 7:30 pm Post subject: cowling alignment |
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it does settle; my Glastar has 250 hours and has settled into position. plan
the same adjustment for the 10.
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cehoffman(at)bellsouth.ne
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| Posted: Sat Apr 29, 2006 6:38 am Post subject: cowling alignment |
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Since my finishing kit is being delivered Monday, I have not reviewed the
instructions. Is there a write-up of the specific tasks to align the cowl
as you have?
In other words, deviations from the Van's instructions.
Cal Hoffman (canoe)
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Tim(at)MyRV10.com
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| Posted: Sat Apr 29, 2006 7:02 am Post subject: cowling alignment |
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I can't remember if they specified it in the plans or not, but I think
-7 builders tell me it's in their plans. At any rate, you just
position the cowl so the prop spinner is not perfectly in line with
the top of the cowl (which looks the smoothest), but make the spinner
a little higher. The amount varies...some people say .125", and some
say .250". I think getting it that precise will be a bit tricky,
but if you shoot for something in that range you'll certainly end
up happier in the end if/after it sags than you would if you
aligned it smooth from day 1. Others want to comment on sag amount?
Tim Olson - RV-10 N104CD - Flying
do not archive
Cal Hoffman wrote:
[quote]
Since my finishing kit is being delivered Monday, I have not reviewed the
instructions. Is there a write-up of the specific tasks to align the cowl
as you have?
In other words, deviations from the Van's instructions.
Cal Hoffman (canoe)
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VHMUM(at)bigpond.com
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| Posted: Sat Apr 29, 2006 12:01 pm Post subject: cowling alignment |
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Yes I did it on my 6 and it worked out fine. Took about 150hours for things
to move but it works. will be doing same on 10.
Chris
40388
x....VH-MUM RV6
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