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Mitch Hodges
Joined: 10 Jan 2006
Posts: 45
Location: Powder Springs, GA
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 Posted: Thu Apr 17, 2008 9:59 am Post subject: 601HDS: Adding a cutout over the leading edge wing tanks |
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Has anyone added a separate nose skin section over the LE tanks to make future access easier, either as part of the original build or after the fact? I'm looking for some photos and/or ideas about the best way to do this.
This seems like the best way to salvage my bad rivet line on rib S8 mentioned in my previous note, and it will add some ease of service in general. I actually considered this earlier but figured I could always add it later if the tank needed to be pulled out. I guess its later!
Mitch Hodges
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Mitch Hodges
N601MH (Zenith 601HDS)
Builder Log at http://www.hodges.aero
Wings Under Perpetual Construction |
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Mitch Hodges
Joined: 10 Jan 2006
Posts: 45
Location: Powder Springs, GA
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| Posted: Thu Apr 17, 2008 5:13 pm Post subject: Re: 601HDS: Adding a cutout over the leading edge wing tank |
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For those of you the retrofitted the tanks (there were a few according to the archives) did any of you splice the nose skin, or did everyone pull it completely loose to retrofit?
Caleb at Zenith suggested the split, but I haven't been able to get him to give me any suggestions yet as to an "approved" way to do it. Probably will have to end up getting him on the phone.
I'm thinking you cut the nose skin to on each rib to cover the entire flange, then overlay the the new "Tank skin" in the same manner. You would then need to rivet through all three skins at the nose ribs (regular nose skin, new "tank skin" and rib flange) probably with A5's.
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Mitch Hodges
N601MH (Zenith 601HDS)
Builder Log at http://www.hodges.aero
Wings Under Perpetual Construction |
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Ron Lendon
Joined: 10 Jan 2006
Posts: 685
Location: Clinton Twp., MI
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| Posted: Fri Apr 18, 2008 5:17 pm Post subject: Re: 601HDS: Adding a cutout over the leading edge wing tank |
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I haven't done that but the way you describe should work just fine. If you are real careful, and just take the heads off, you can most likely use A4's again.
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Ron Lendon
WW Corvair with Roy's Garage 5th bearing
CH 601 XLB
N601LT - Flying
http://www.mykitlog.com/rlendon
Corvair Engine Prints:
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Mitch Hodges
Joined: 10 Jan 2006
Posts: 45
Location: Powder Springs, GA
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| Posted: Sat Apr 19, 2008 1:31 pm Post subject: Re: 601HDS: Adding a cutout over the leading edge wing tank |
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| Ron Lendon wrote: | | I haven't done that but the way you describe should work just fine. If you are real careful, and just take the heads off, you can most likely use A4's again. |
I was worried about the weight of the full tank pressing against it without the continuity of a single piece nose skin. It appears the factory approved mod requires A5 so I'll go with that once I get confirmation that it is Ok for the HDS wing, although I don't know why it wouldn't be.
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_________________
Mitch Hodges
N601MH (Zenith 601HDS)
Builder Log at http://www.hodges.aero
Wings Under Perpetual Construction |
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Mitch Hodges
Joined: 10 Jan 2006
Posts: 45
Location: Powder Springs, GA
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| Posted: Mon Apr 21, 2008 3:21 pm Post subject: Re: 601HDS: Adding a cutout over the leading edge wing tank |
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| Mitch Hodges wrote: | | ...so I'll go with that once I get confirmation that it is Ok for the HDS wing, although I don't know why it wouldn't be. |
I said I would post a follow-up once I got confirmation from the factory. Caleb basically confirmed that the skins should overlap the ribs and share the same set of holes through both skins and the ribs. He also indicated that using A5s was not necessary since there was no increase in loads.
So, I will trim the factory nose skin to fit from S8 to the wing tip and from the added tank rib to the inboard edge. I'll have fabricate a new "tank skin" to replace the gap and all will be well. In fact, I'm guessing this will make dealing with the tank install easier.
Now the question is whether I retro fit the other wing or until if/when there is an issue with the tank. That's a question for another day.
Thanks to all that responded.
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_________________
Mitch Hodges
N601MH (Zenith 601HDS)
Builder Log at http://www.hodges.aero
Wings Under Perpetual Construction |
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