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CJ6 gear doors

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Okanogan Lew

Joined: 22 Jul 2010
Posts: 45

Posted: Sat Dec 25, 2010 9:30 pm Post subject: CJ6 gear doors

Guys, has anyone tried extending the lower gear door on a CJ6, so that it totally covers the gear when closed?  If so, please share your results.  Thanks in advance.

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dsavarese0812(at)bellsout
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Posted: Sun Dec 26, 2010 6:39 am Post subject: CJ6 gear doors

I think the only practical way to fully cover the wheel/tire  in the wheel well would be to add an additional gear door to the inboard side of  the wheel well which closes over the open end of the tire when the wheel is  seated in the well.  Extending the gear door on the gear leg would require  the lower section to move with the compression of the strut.....a somewhat  similar concept used on the Yak 52TW which have had their own problems with the  lower gear doors and also does not fully cover the wheel/tire assembly when in  the well.    I would think (and this is only my ultra conservative  opinion and only worth what the reader is paying for it ) a redesign of  the gear door mechanism to close over the wheel/tire assembly would be cost  prohibitive for any resulting benefit in speed or cosmetics.

  

 Extending the lower gear door would definitely cause problems  upon hard landings as the strut compresses or on grass which has not been cut to  the level of a golf course green.

  

 Dennis

  

  

  

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cpayne(at)joimail.com
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Posted: Sun Dec 26, 2010 7:43 am Post subject: CJ6 gear doors

For what purpose would someone cover the main gear wells? If you are thinking drag reduction I would say that there are several other spots on the CJ-6 that would yield a better result for the time/money spent on development.



I say this because I tried it; after a couple of mangled doors that got jammed I gave up before I broke something serious. Later I found that careful fitting of the existing gear door covers yielded a bigger gain than I expected from covering the well. Now I'm not saying that a gear well "slipper" such as the LoPresti product would not help. A Reno-style "gasket" sealing around the wheel in the well, such as on the T-6 may benefit some too.



Tuft testing I did revealed no significant turbulence downstream of the well. I think this is due to high pressure. However there is a problem that gear doors might help with: CO reduction by sealing the gear well against the intrusion of exhaust gases.



Craig Payne

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