>>>>>>> Jerry,
>>>>>>>
>>>>>>> I just talked to Ken at Vans. Stonewall. Call back next
>>>>>>> Monday. I don't
>>>>>>> have access to those drawings. The rotary has too many
>>>>>>> problems. Just
>>>>>>> get the mount from us and match drill it to the firewall.
>>>>>>> etc., etc.,
>>>>>>> etc. The one thing that he did say was that he thought
the
exact
>>>>>>> location wasn't too critical. 'If you get it within
1/4" it
will
>>>>>>> probably be all right.' This from an "engineer!"
>>>>>>>
>>>>>>> Rats.
>>>>>>>
>>>>>>> I notice that Conversion Concepts offsets the engine 1
degree.
>>>>>>> To the
>>>>>>> right for the RWS RD-1C 2.85 redrive. But that doesn't
help
much.
>>>>>>>
>>>>>>> Where do we go from here?
>>>>>>>
>>>>>>> Doc
>>>>>>>
>>>>>>> No problem Doc we got it. If you have the cowl measure
the
lenght
>>>>>>> of it to the prop flange hole from the back while
>>>>>>> it is sitting on the floor pointing up. Most are 39
inches.
>>>>>>>
>>>>>>> Paul Lamar ...No rotor no motor.
>>>>>>
>>>>>> Don't have the cowl yet. Should I order it now? Conversion
>>>>>> Concepts says to
>>>>>> order the O-320 as it is longer than the O-360; but
this is
>>>>>> kind of moot as
>>>>>> Vans doesn't approve of the O-360 in the 9. What do you
think
>>>>>> of the James
>>>>>> cowl? All I have heard is that it is superior
aerodynamically
>>>>>> and results in
>>>>>> ~ 7 kt. speed improvement.
>>>>>>
>>>>>> Doc
>>>>>>
>>>>>> The James cowl is good. Better for the rotary.
>>>>>> We will need the length. I might have it. I'll look
>>>>>> around. Yep I have it. It is 37 inches long.
>>>>>>
>>>>>> Paul Lamar ...No rotor no motor.
>>>>
>>>>
>>>>> Doc
>>>>> My C of G on the RV7 came out one American inch behind
the usual
>>>>> O 360
>>>>> position with CC mount,James Cowl and Tracy box. There
is lots
>>>>> to cut off
>>>>> the James Cowl, so you could position your engine further
forward.
>>>>>
>>>>> Ian.
>>>>
>>>> Thanks Ian for the good news. Lighter is better.
>>>>
>>>> Jerry Hey will be building the mount. You get this, Jerry?
>>>>
>>>> Doc
>>>
>>> Yes,I am looking forward to seeing how Paul handles the
nose gear
>>> socket. I am sure he will come up with a good design. This
will be
>>> the first time for me to build an SBeam mount with the
nose gear a
>>> part of the mount. The nose gear structure should be a good
place for
>>> the rear strut. Jerry
>>>
>>>
>>> It will look exactly like this mount except the following
>>> tubes will be kept.
>>>
>>> The best way to do it and probably cheaper in the long run
>>> and much more likely to fit perfectly is start with a Lyc
>>> mount and cut way what you are not going to use.
>>>
>>> --
>>> Paul Lamar ...No rotor no motor.
>>
>> I agree that would be easiest. Jerry
>>
>> -----------------------------------------
>> Here are some jpgs of the RV6A motor mount.
>> Not final yet. The beam is not shown. Bushings
>> too close together.
>>
>> Paul Lamar ...No rotor no motor.
>>
>> -----------------------------------------------
>> Here is the engine super imposed on the James cowl
>> side view.
>>
>> Ian is this about what yours looks like?
>> --
> > Paul Lamar ...No rotor no motor.
>
>
>
> Great drawing Paul.
> Mine does not have the nose wheel. Much better for forced
landings. My
> engine is a little closer to the firewall. The James cowl is
very
close to
> the top of the engine. Too close to run the inlet pipes over
the
top. Also
> the space underneath is the wrong shape for a flat oil and
water
cooler
> arrangement. The sump is closer than on your drawing. Sump to
cowl is
> 250mm
> except in the center where it is more and follows through to
the
exit duct
> area.
> There is room if the oil and water rads are positioned in a
vertical wedge
> shape. From memory my water (Evans) cooler is 250mm X about
600,
(same
> length as the Mazda oil cooler) X 50mm.
>
>
> Ian in Perth
>
> Looks like the trade off for a pointy nose is not worth
> the loss of volume under the cowl in the places we
> need it. However that is an RV8 cowl and not a RV9A cowl.
> Was your James cowl specifically for a an RV7?
>
>
> Paul Lamar ...No rotor no motor.
It was ordered for the RV7.
Ian
Thanks Ian.
I asked for a dwg from Will James. We shall see what I get.
In the mean time could you please take a couple of pictures for
me? One from the side about the same height above the ground.
And one from ladder looking down at the top of the cowl more
or less. You don't have to be suspended above the airplane.
Perhaps with the cowl off just sitting on its back side.
I can scale a lot off a few pictures.
Thanks.
Paul Lamar ...No rotor no motor.
Bruce at Custom Components in Tacoma, Washington builds the mounts for
RVs. i bought a partial mount for my RV-4 from him for $200. It was
the
firewall mount with the gear leg sockets. I got spent another $200 for
4130 tubing and built up the rest myself. Other modfications
included a
16" spinner and 1" taller firewall. These two mods will allow much
more
space inside the cowl. Also moved the prop hub 5" inches forward from
the stock position in anticipation of putting the heat exchangers
under
the fuselage. This was to offset the weight and balance issue.Final
weight and balance issues will be resolved by shifting the batteries-
two 21 amp saturated mat cell batteries. Hope to have all the
construction completed in two months.
Brian Trubee
Thanks Brian for the contact. If Bruce can supply the gear mount
that will make the project a lot easier. Jerry
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