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  #1  
Old 04-19-2017, 12:17 PM
Toobuilder's Avatar
Toobuilder Toobuilder is offline
 
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Question Fuel Tank End Ribs

Iím looking to build a set of tanks for the Rocket and was cruising the Vans site for RV-8 tank end ribs since RV-4 parts are no longer listed. Curiously, there is a T-803-R, but no T-803-L. Is this same part used in both ends of both tanks? Iím thinking the difference is the direction of flanges or embossed stiffeners.

Even curiouser, there is an equivalent R and L for the RV-7 (T-703-R/L). I thought these were essentially the same wing? Additionally, the -7 part is considerably more expensive.

Can anyone shed some light on this mystery?
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Michael Robinson
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  #2  
Old 04-20-2017, 05:55 AM
RogerG RogerG is offline
 
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Location: Lubbock, TX
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The RV-4 tank parts are not listed on Vans site, but when I called found them to be in stock, and inexpensive. T-403-R/L for end ribs, and flanges face out. Interior ribs are T-404-L for left wing, T-404-R right wing, and face outboard.

When you call Vans they will gladly email you RV-4-17A Dwg(Fuel Tank)if you request.
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  #3  
Old 04-20-2017, 06:24 AM
N733JJ N733JJ is offline
 
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Location: Wappingers Falls, NY
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Quote:
Originally Posted by Toobuilder View Post
Iím looking to build a set of tanks for the Rocket and was cruising the Vans site for RV-8 tank end ribs since RV-4 parts are no longer listed. Curiously, there is a T-803-R, but no T-803-L. Is this same part used in both ends of both tanks? Iím thinking the difference is the direction of flanges or embossed stiffeners.

Even curiouser, there is an equivalent R and L for the RV-7 (T-703-R/L). I thought these were essentially the same wing? Additionally, the -7 part is considerably more expensive.

Can anyone shed some light on this mystery?
I just went through this building new tanks for my 8 with the "old" wing.
As mentioned, there should be a left and a right. Although all models have the "same wing", there are differences in the size of the ribs due to changes of the main spar with different models over the years. If the part is not listed on "the list", it is likely out of stock. Call and ask, in my case a couple parts had to be made so it took a few weeks.

Scott A Jordan
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  #4  
Old 04-20-2017, 08:25 AM
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Toobuilder Toobuilder is offline
 
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Thank you gentlemen. I'll give Vans a shout tomorrow and hopefully grab some parts.

I am a bit worried about the availability of the earlier parts, as they seem to be selling off and not replenishing. As an example, I needed a new aileron for the Rocket and have to adapt the RV-8 unit. No big deal except for the differences in the spar (the -8 has the big lightening holes, the -4 is solid), and my neighbor snagged the very last -4 spar they had. Fortunately, that's an easy piece to make.
__________________
WARNING! Incorrect design and/or fabrication of aircraft and/or components may result in injury or death. Information presented in this post is based on my own experience - Reader has sole responsibility for determining accuracy or suitability for use.

Michael Robinson
______________
Harmon Rocket II -SDS EFI instalation in work
RV-8 - Flying
1940 Taylorcraft BL-65 -flying
PA-20-inspired "family truckster" -in work
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  #5  
Old 04-20-2017, 01:00 PM
rvbuilder2002 rvbuilder2002 is offline
 
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Location: Hubbard Oregon
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Quote:
Originally Posted by Toobuilder View Post
Thank you gentlemen. I'll give Vans a shout tomorrow and hopefully grab some parts.

I am a bit worried about the availability of the earlier parts, as they seem to be selling off and not replenishing. As an example, I needed a new aileron for the Rocket and have to adapt the RV-8 unit. No big deal except for the differences in the spar (the -8 has the big lightening holes, the -4 is solid), and my neighbor snagged the very last -4 spar they had. Fortunately, that's an easy piece to make.
A customer can still order RV-4 kits (Including the wing) so he may have gotten the last one in stock at the moment............
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  #6  
Old 04-20-2017, 01:59 PM
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Toobuilder Toobuilder is offline
 
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Originally Posted by rvbuilder2002 View Post
A customer can still order RV-4 kits (Including the wing) so he may have gotten the last one in stock at the moment............
OK, that's great. It would be even better if the people on the phone at your end knew that. I was distinctly told (by Vans) that many of the RV-4 parts were being replaced with RV-8 parts, and the -4 stock was NOT being replaced. In addition to my tank ribs, I'll be ordering a -4 aileron spar tomorrow to replace the one in my -8 aileron kit.
__________________
WARNING! Incorrect design and/or fabrication of aircraft and/or components may result in injury or death. Information presented in this post is based on my own experience - Reader has sole responsibility for determining accuracy or suitability for use.

Michael Robinson
______________
Harmon Rocket II -SDS EFI instalation in work
RV-8 - Flying
1940 Taylorcraft BL-65 -flying
PA-20-inspired "family truckster" -in work
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