Hello Paul, Please can I ask you for some power stats for a turbo charged 13b , I asked
Tracey for a price for his PSRU , and I am sure we will go with it , in the future.

The  Project is to replace a  Ivchenko IR14a radial. And equip it to work in Central
africa.

We need 280 Hp on take off , 300 would be perfect. But in the cruise will need
230-250Hp.

These aircraft are working in High humidity and wet conditions doing short hops for Oil
prospectors and pest control in the summer.

We have decided to put a fixed prop on and forego the hydraulic variable prop as the
engine has such a wide rev range compared to the radial.


Any feed back will be of great value and very appreciated.


20B engines are not available here and due the remote areas we have to look at the
humble13B and run them for 500 Hrs then rebuild. The economics of the engine re-build
means that we can keep  3 or 4 in stock in Congo.



Bradly Banks


300 HP is not much of a problem with a turbo 13B or RX8 motor.
I would go with a p-port inter cooled turbo and
ceramic apex seals. Mazdatrix could build one for you.

You will have lots of room in the cowl for the inter cooler
and cooling system.


The big problem is you will be limited to a 72 inch diameter
or so prop with Tracy's 2.8:1 gear box. That will hurt the takeoff
performance some what.

What happened to the Polish geared radial with 360 HP?
Vedeneyev M-14P

Have you looked at a P&W R-985?

Paul Lamar