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Bob, I sent your message to a friend of mine who has an Rv-9. He could not
reach your e mail, so am forwarding his reply to you.
Ed
From: Bill Repucci [mailto:bill@repucci.com]
Sent: Friday, December 19, 2008 1:35 PM
To: 'Ed Anderson'; 'flyrotary@lancaironline.net'
Subject: RE: [FlyRotary] RV 9 Engine Mount
Ed & Bob,
Yes, the -9's engine mount is different than the rest. The reason is all in
the wing. Van had to raise the AoA to fully stall the wing when on all
three wheels. Also, the -7's intersection fairings won't work because of
the angle at which the gear leg exists the fuselage. All very much a pain
for the few of us -9 builders. I suspect they are all the same for the -7A
& -9A's.
As for why Van's doesn't include the dimensions on the plans. Well, they
don't include most of the dimensions on the new plans as there is no way to
build these new kits from scratch as you could the -3,4, & 6.
Most builders simply buy the engine mount from Van's, jig it up, cut, and
weld the sections they need to hold their alternative engine in place. It
is a bit of an expensive way to go but it will guarantee everything lines
up.
One other thing, Van's makes two different length engine mounts for the -9.
Mine has a full 12" between the firewall and the engine, whereas the common
mount is only 10" long. This is required for the lighter engines O-235 and
O-290 (in my case), the O-320's use the shorter mount.
Radomir was able to find the web site for the fabricator that Van's uses but
I had no luck and have sent him a note. Bob, you might have better luck
than me. If you locate them, they might be able to weld up a custom mount
at a reasonable price. I do know they have done things like made custom
gear legs for a friend's -9 in Alaska. (He wanted to use 6" wheels rather
the stock 5" wheels.)
Best of luck with your project.
Regards,
Bill Repucci
RV-9
www.repucci.com/bill/baf.html
-----Original Message-----
From: Ed Anderson [mailto:eanderson@carolina.rr.com]
Sent: Friday, December 19, 2008 12:46 PM
To: bill@repucci.com
Subject: FW: [FlyRotary] RV 9 Engine Mount
Hi Bill,
Don't know if you might have this information on the Rv-9 engine mount.
Seems strange that Van would keep it a secret when its all over the plans
for my RV-6A. But, then perhaps their motor mount vendor wished it kept
that way to prevent competition.
Ed
Ed Anderson
Rv-6A N494BW Rotary Powered
Matthews, NC
eanderson@carolina.rr.com
http://www.andersonee.com
Ed Anderson
Rv-6A N494BW Rotary Powered
Matthews, NC
eanderson@carolina.rr.com
http://www.andersonee.com
http://members.cox.net/rogersda/rotary/configs.htm#N494BW
http://www.dmack.net/mazda/index.html
-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Bob Perkinson
Sent: Thursday, December 18, 2008 11:27 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] RV 9 Engine Mount
I am at the point in my RV-9 build where I need to build the engine mount.
The main problem here is I don't have the caster and camber angle for the
gear leg socket. Vans keeps these measurements classified. They did tell me
that the Gear leg intersection fairings for the RV-7 would not fit the RV-9
because the angles were different so that would lead me to believe that the
RV-7 and RV-9 use different engine mounts even though the fuselage is
basically the same. There are not many RV-9 being built, and none with a
Rotary that I know of. Would anyone in the group happen to know these
angles or knows of someone that does, besides Vans?
Thanks
Bob
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