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07-13-2016, 04:18 PM
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Join Date: Jul 2016
Location: oregon
Posts: 7
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Addendum to Sport Aviation Gear Jack Article
For those of you that read the July 2016 Sport Aviation/Experimenter, the article was edited from the original and vital info was left out.
The axles for the RV's are NOT hollow. Never have been. The landing gear (as supplied thru Vans) has a hole in the axle mounting pad area. This is what will holding the machine up. The "Z" bracket for the wheel pants is NOT drilled for this hole. You will have to do this yourself. It is conveniently located at the center intersection of the axle mounting bolts. (lower left picture). As I do not know for certain if model changes have been made over the years, the hole in the landing gear is the determining factor of the hole in the "Z" bracket. I drilled mine with the axle bolted on, and slowly opened the hole in the bracket to fit the hole in the gear leg.
The gear WILL grow OUTWARD.
If you have ever tried to remove the wheel pant with a flat tire, one will very quickly notice the lowest two screws are a bugger to remove. Hence the main reason for developing this idea.
Hope this helps someone-somewhere.
Ed
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07-13-2016, 04:21 PM
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Senior Curmudgeon
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Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 15,408
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Welcome to VAF!
Ed, welcome to VAF 
The axle in my 10 is hollow.
What model of RV are you talking about---------I suspect the 8, maybe?
__________________
Mike Starkey
VAF 909
Rv-10, N210LM.
Flying as of 12/4/2010
Phase 1 done, 2/4/2011
Sold after 240+ wonderful hours of flight.
"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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07-13-2016, 10:08 PM
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Join Date: Jul 2016
Location: oregon
Posts: 7
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Yes, the gear jack is for a RV-8 taildragger. I believe all the other RV's have tubular type gear legs.
The fact that the 10 has a hollow axle would allow the same principle to work.
Simply carry the "adapter" with you.
Where in the world could you possibly go that you could not find a scissor jack in the parking lot.
Cheers,
Ed
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07-14-2016, 07:09 AM
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Join Date: Sep 2007
Location: Central IL
Posts: 5,515
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Quote:
Originally Posted by bulldogbuilder
Yes, the gear jack is for a RV-8 taildragger. I believe all the other RV's have tubular type gear legs.
The fact that the 10 has a hollow axle would allow the same principle to work.
Simply carry the "adapter" with you.
Where in the world could you possibly go that you could not find a scissor jack in the parking lot.
Cheers,
Ed
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My 7 has solid legs, but a tube axle welded on the end.
__________________
Bill
RV-7
Lord Kelvin:
“I often say that when you can measure what you are speaking about,
and express it in numbers, you know something about it; but when you
cannot measure it, when you cannot express it in numbers, your knowledge
is of a meager and unsatisfactory kind.”
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07-14-2016, 08:21 AM
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Join Date: May 2006
Location: Pocahontas MS
Posts: 3,884
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Both -4s I've owned have hollow axles; the -7 I'm building has hollow axles.
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07-14-2016, 09:31 AM
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Join Date: Jul 2016
Location: oregon
Posts: 7
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A bit of clarification: The axel stub may be hollow, but the mounting pad/block is the part that is being discussed. This would be the, roughly rectangular, block with the four mounting holes. My RV-8 is a solid block.
Lifting the airplane from the axle/nut side would be complicated by the wheel pant being in the way. And then the jack being in the way for tire removal.
If I were building today, I would have to think about drilling a hole in the axle mounting block to allow for a longer bolt to be used for lifting. Even a 1/2" would help, but not sure this would even be necessary. Ahhh, the joys of "Experimental".
Ed
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07-14-2016, 09:45 AM
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Senior Curmudgeon
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Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 15,408
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Quote:
Originally Posted by bulldogbuilder
The axle stub may be hollow, but the mounting pad/block is the part that is being discussed. This would be the, roughly rectangular, block with the four mounting holes.
Ed
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As far as I know, the 8 is the only model to use the flat "Cessna" style gear.
All other models I know of use the round or "Whitman" style gear legs.
Possible exceptions are the 12, and 14---never seen the naked landing gear on them to know for sure.
__________________
Mike Starkey
VAF 909
Rv-10, N210LM.
Flying as of 12/4/2010
Phase 1 done, 2/4/2011
Sold after 240+ wonderful hours of flight.
"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
Last edited by Mike S : 07-14-2016 at 09:55 AM.
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07-14-2016, 09:53 AM
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Join Date: Sep 2007
Location: Central IL
Posts: 5,515
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Quote:
Originally Posted by bulldogbuilder
A bit of clarification: The axel stub may be hollow, but the mounting pad/block is the part that is being discussed. This would be the, roughly rectangular, block with the four mounting holes. My RV-8 is a solid block.
Lifting the airplane from the axle/nut side would be complicated by the wheel pant being in the way. And then the jack being in the way for tire removal.
If I were building today, I would have to think about drilling a hole in the axle mounting block to allow for a longer bolt to be used for lifting. Even a 1/2" would help, but not sure this would even be necessary. Ahhh, the joys of "Experimental".
Ed
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Ed, I read the article and see what you are talking about. The short engagement of that bolt could allow it to slip out. One might consider threading that gear and it won't slip out. No claims of bending though. 
__________________
Bill
RV-7
Lord Kelvin:
“I often say that when you can measure what you are speaking about,
and express it in numbers, you know something about it; but when you
cannot measure it, when you cannot express it in numbers, your knowledge
is of a meager and unsatisfactory kind.”
Last edited by BillL : 07-14-2016 at 10:31 AM.
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07-14-2016, 06:08 PM
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Senior Curmudgeon
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Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 15,408
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Quote:
Originally Posted by RV8JD
Wittman (as in Steve)!
(extra words - Hangar, biennial, pedal, etc. ...
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OOPS, my bad 
Thanks for the correction.
__________________
Mike Starkey
VAF 909
Rv-10, N210LM.
Flying as of 12/4/2010
Phase 1 done, 2/4/2011
Sold after 240+ wonderful hours of flight.
"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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