> Hi,
 > Ive still got a long way to go before fitting an engine but Im just
 > curios.
 > Would I need a bigger oil pan for a 13B installed in a Vision or is
it
 > only applicable to the RX8 engine? Would a bigger oil pan benefit the
 > 13B in my application?
 >
 > Regards,
 > Pierre in South Africa

 > It is not mandatory but more oil takes longer to heat up.
 > The main reason oil over heats is because full power is used for
 > take off and climb out.
 >
 > Paul Lamar

Pierre
Good to see  Vision building in Soth Africa - any more Visions with
rotaries
being built over there?
George ( down under)


Some of the guys were looking into rotaries. However, Steve Rahm, the
designer, prefers the Subaru engine. For me though, there is only one
choice and I've already got two 13B's waiting to be rebuilt. I've
stripped one and it seems that I'll only have to replace the seals.
Everything else looks good.

Would anybody have the dimensions and other detail of the oilpan for the
13B perhaps?

Regards,
Pierre in South Africa


Here are a few. We usually integrate them with the motor mount.
What kind of motor mount and gear box do you plane on using?
The oil pan and motor mount are some of the last things you build as you
need to
mock up the cooling system and all the other major parts that go under
the cowl. The Vision is a small airplane.

Paul Lamar

Pierre,
How many Visions in Sth Africa?
George ( down under)


Besides my Vision, I know of 4 other guys in SA that's building them. It
seems that they are opting for the Subaru engine.

When I reach that stage,I'm planning on using the PRSU from Tracy Crook.

Regards,

Pierre

I guess the Mazda rotary is over kill. Sounds like a good ap for the Rotamax.

Paul Lamar

Pierre,
Paul is right the Rotamax would be a good choice. I believe Steve tried the
Subaru and had so many problems he went back to a conventional aircraft
engine. The [Mazda] 2 Rotor is a little heavy for the 300 lb FWF limit- you might consider a single PP engine. However the 2 rotor can be used provided you
manage the weight and balance issues.
I have tried to educate Steve on the benefits of the Rotary but I don't
think he worries about auto engine conversions, he more interested in
aircraft design. Your heading down the right track.

BTW I'm helping a chap from Sth Africa, who has moved to Australia.
He recently purchased the Vision plans.
George (down under)

Given that most SOHC Soobs in aircraft are about 100 HP. Sure they are rated at
150 HP but that is about 6000 to 6500 RPM and people wind up
with a 1.8 to one gear box which puts them at 4850 take off RPM
so HP is way down. Apparently they don't like the sound of them
screaming full chat at 6500. All high revving piston engines sound like
they are ready to explode WOT at 6500 RPM full load :) Stand next to one
in a dyno room sometime but make sure you have your armor on.
Don't forget you have to do that for five or ten minutes as you takeoff and climb out. The rotary is just starting to sound good at 6500 RPM.
I love the sound of my RX8 above 6500 RPM. I can only do that for a short
period and then I am well over 100 MPH.

Paul Lamar