>      > >
>      > > Hello Paul,
>      > >
>      > > I'm searching for a RV-4 renesis engine mount.
>      > >
>      > > Jerry told me you would do the engineering and he would do  > the
>     welding.
>      > >
>      > > As I remember you will need the firewall hardpoint plan sets
>      > > which I don`t have because I decided to start firewall  > forward
>      > > for different reasons.
>      > >
>      > > I remember seeing some pics of a RV-4 mount on your homepage,
>      > > so I hope you already got the needed plans?
>      > >
>      > > best regards
>      > > Thomas
>      > >
>      > > Sure no problem. I need a few dimensions. The firewall out  > line
>      > > and the lenght of the cowl. Also do you plane to use the  > stock
>      > > checked cowl or build you own? I think I know where you
>      > > can get a real slick rotary engine cowl from Brian Trubee.
>      > > Brian might also give us the hard point dimensions. I might
>      > > have them as well.
>      > >
>      > > --
>      > > Paul Lamar ...No rotor no motor.
>      >
>      >
>      >
>      > Cool!
>      >
>      > I don`t want to use the stock cowling.
>      > Something like Mike Wills or Brian Trubee, if possilbe with  > a ram air
>      > scoop. But thats far away in the future yet.
>      >
>      > Is Brain still onboard?
>      >
>      > Kind regards
>      > Thomas
>      >
>      >
>      > Yes he is. He moved the cooling rad down under the cockpit  > somewhat
>      > like the quick and simple cooling system. Frees up a lot of  > volume
>      > under the cowl. Does away with the scoop under the prop. Makes
>      > the cowl easier to build. The last shots are of Steve Rosine
>      > airplane.
>      >
>      > Paul Lamar
>
>
>     Hi Paul,
>     I can't put the rad under the cockpit. I think I have to reserve
>     this space for a big muffler. I suppose noise regulations are  > quite
>     stricter here as in the US. With a RV-4 the benchmark in  > Germany is
>     around 63 db(A).
>
>     If I plan to make a custom cowling, do you still need the  > length of
>     the cowling? I thought the dimensions of the cowling will be  > defined
>     by the design of the mount?
>
>     Kind regards
>     Thomas
>
>
>     Ah yes. They will probably make you run a three blade prop
>     too. OK back under the cowl with the rad. It is going to look
>     more like a P40 than an Me109 :) (Bf109 ?)
>
>     Paul Lamar ...No rotor no motor.
>
> I changed a few things on my aircraft- made the firewall 1 inch  > taller,
> and placed the prop flange 44 inches in front of the firewall, instead
> of the stock 39 inches. Also used .025 thick elevator skins and the
> extruded trailing edges for the h stab. We'll see how the weight and
> balance comes out- I can always change the battery position.
>
> I don't know what provisions are made for engine mounting on the
> renesis, but I imagine that it is similar to the generation 3, in  > which
> case you can use a shertz beam type mount.
>
> Brian Trubee
>
> Yes that is what I did. Use a Schertz Beam. Here is a 3D Thomas.
> P-port. Exhaust pipes not shown yet.
>
> Paul Lamar

Re Brian's moving the prop out to 44 inches, I think this usually a
good idea in that extra space  between the firewall and engine is
very useful.  Also, a p ported 13B , properly installed,  will be
lighter than the 0-320 it replaces.   I am going to rebuild my
Tailwind engine mount (again, sigh) and I am going to move the prop
flange out to 42 inches from 38 inches. CG can be fine tuned with
battery placement.
Jerry


OK here it is at 44 inches.
-- 
Paul Lamar ...No rotor no motor.

Hi Paul,
Wonderful job. Thank you.

Did you design the mount for the standard firewall (29,13) or the
1 inch taller one like Brian did?
Is this a necessary issue, or was it just for a more comfort
installation?

I wouldn't dare to P-port my renesis.
I prefer side-ports like Tracy did.
For the RV-4 I don't have to squeeze every PS out of the
renesis I could, even If you could have enough power like
you used to say :)

Kind regards
Thomas

Just don't fly over the Alps :) You will need that extra p-port
power at 14,000 feet 5000 meters. Tracy lives at or below sea level :)