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  #1  
Old 01-10-2018, 01:51 PM
Lars Lars is offline
 
Join Date: Nov 2005
Location: Davis, CA
Posts: 945
Default Looking for early RV-4 plans

This may be a long shot, but specifically dated before 11/1983, looking for sheets 24, 30 and 31. A smartphone photo of them would be fine, just need to verify some tail attach details on a plane I'm working on.

Email is best, yoloflyer@gmail.com

Thanks!
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Lars Pedersen
Davis, CA
RV-7 Flying as of June 24, 2012
500 hours as of September 30, 2017
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  #2  
Old 01-10-2018, 03:59 PM
RV-4 RV-4 is offline
 
Join Date: Oct 2007
Location: St-Jerome,Quebec,Canada
Posts: 956
Thumbs up RV-4 PLANS

Hi Lars

My -4 is a 1982 vintage and I still have the plans so exactly what pictures do you need??

I don't think mine are numbered by pages but if you have a specific page you wanna have a look at I can check if I still have it.

Bruno

rv4@videotron.ca
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  #3  
Old 01-10-2018, 04:10 PM
HFS HFS is offline
 
Join Date: Aug 2009
Location: Lemoore, CA
Posts: 218
Default RV4 Drwgs.

Lars -

I built my -4 in 1985, but the drawings you are inquiring about were drawn in 1982/83, so they should be good to go for you.

OBTW - I was an "Aggie" from 1967 to 1972 Civil Engineering. Remember going out to the airport a lot and dreaming. Still go there to visit friends that never left.
I know you have been there for a while because I have been watching your posts, and was hoping to get together with you sometime to look at your plane - maybe this would be a good reason to do so.

David Howe
RV4 S/N 1136
HRII S/N002
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  #4  
Old 01-11-2018, 10:39 AM
Nate-ISU Nate-ISU is offline
 
Join Date: Mar 2013
Location: Indianapolis
Posts: 37
Default

My -4 first flew in June of '83. Here are the sheet numbers requested from the plans I inherited with the plane all circa 1982.

#24
https://i.imgur.com/mLxYgon.jpg

#30
https://i.imgur.com/wvfXbaJ.jpg

#31
https://i.imgur.com/s3vF7i3.jpg

Last edited by Nate-ISU : 01-11-2018 at 04:12 PM.
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  #5  
Old 01-12-2018, 12:18 PM
Lars Lars is offline
 
Join Date: Nov 2005
Location: Davis, CA
Posts: 945
Default

Quote:
Originally Posted by Nate-ISU View Post
My -4 first flew in June of '83. Here are the sheet numbers requested from the plans I inherited with the plane all circa 1982.

#24
https://i.imgur.com/mLxYgon.jpg

#30
https://i.imgur.com/wvfXbaJ.jpg

#31
https://i.imgur.com/s3vF7i3.jpg
Most helpful, thanks Nate!
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Lars Pedersen
Davis, CA
RV-7 Flying as of June 24, 2012
500 hours as of September 30, 2017
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  #6  
Old 01-14-2018, 08:13 AM
egp8111 egp8111 is offline
 
Join Date: Jan 2011
Location: NC
Posts: 29
Default

Lars,

I have an early set that shows a different horizontal stab. attach method (# 30)
if thats what you need. I contacted Van's and they said either one was OK. There is a picture of it on the forum you can find if you search "stab attach" or such. PM me if you can't find it and I'll send you a pic of my old plans sheet
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  #7  
Old 01-14-2018, 08:03 PM
Lars Lars is offline
 
Join Date: Nov 2005
Location: Davis, CA
Posts: 945
Default

Quote:
Originally Posted by egp8111 View Post
Lars,

I have an early set that shows a different horizontal stab. attach method (# 30)
if thats what you need. I contacted Van's and they said either one was OK. There is a picture of it on the forum you can find if you search "stab attach" or such. PM me if you can't find it and I'll send you a pic of my old plans sheet
Skip
Turns out I now have a couple of version of older plans.

I've been assisting on a condition check on an early RV-4. When we first saw it we were concerned that the original builder had invented his own horizontal stab attach- partially the result of being a little hair-trigger due to all the RVs that have come through the shop with atrociously poor stab attach workmanship. A call to Van's didn't help- apparently no one on current staff was aware of the significant changes that Van made on the horizontal stab attach as the RV-4 evolved, and photos led them to conclude erroneously that it was not to (early in this case) plans. Where is Van when you need him?

Now we realize that what we were looking at was actually a properly executed example of rev 1-ish tail tail attach. The F-410 bulkhead is one piece but the attach angle is behind the horizontal stab spar, not in front of it as in rev 0. My guess is that the RV-4 horizontal stab attach, with its associated split F-410 bulkhead layout that has become the standard layout for Van's tail attach was done because the original RV-4 attach was really difficult to install. Thinking a midget with Gumby arms would've been necessary to get on the bolts that would only have been accessible by shimmying into the aft fuselage head-first.

It's been fun gaining a little insight into the evolution of Van's designs in the last few days. Thanks again to all that replied and supplied me with most useful information!
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Lars Pedersen
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RV-7 Flying as of June 24, 2012
500 hours as of September 30, 2017
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  #8  
Old 01-15-2018, 07:47 AM
egp8111 egp8111 is offline
 
Join Date: Jan 2011
Location: NC
Posts: 29
Default



Found the pic I sent to Van's. This is from plan set #1904. They replied this was an early version on the horz. stab. attach method and was used (and still being used) by early 4s with no problems. This is how my a/c is built. They did not offer any explanations as to why it was later changed. Standardization with later models maybe ?
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  #9  
Old Yesterday, 11:42 AM
Lars Lars is offline
 
Join Date: Nov 2005
Location: Davis, CA
Posts: 945
Default Original horizontal stabilizer attach design

Here's a snip from a print of the original version of sheet 30, from plans set #68. In this, apparently the original design, the horizontal stabilizer forward attach angle is visible ahead of the spar. If you look closely you can see that the owner of the plans drew the "rev 1" attach angle in by hand, behind the spar.

Seems to me that it would not have been fun to assemble the stab to the fuselage with that design, which I assume is why it changed fairly quickly.

All of which is probably of only mild historic interest at best, but having the various versions of the drawings sure cleared things up for me. Thanks again to all who replied.

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Lars Pedersen
Davis, CA
RV-7 Flying as of June 24, 2012
500 hours as of September 30, 2017

Last edited by Lars : Today at 12:56 AM. Reason: grammar
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