Hello Im brad Banks , and Im in South Africa

Im looking for an alternative for my  IA14R Ivchenko engine, we have 2
PZL101 Gawron (GAVRON)  aircraft,  they are notoriously heavy on fuel and
expensive to overhaul.

The current engine is a 9L monster of soviet excess, it eats 1Lt per min and
produces 230Hp at 2800 rpm, at cruise the engine ticks along at 70%  +- 1800
rpm  and it  weighs in at a whopping  290 Kg's with out the prop.

Could I ask a few questions:

1)Would a crisp 13B turbo produce enough to spin the V530 prop sufficiently
to lift off

2)The reduction in the IA14r is 60% this means to match the prop  rpm to the
engine will require some paradigm shifting in the design process.(any ideas)

3)The last hurdle will be that the prop spins clockwise  when looking
directly at the airplane from the front.

4) How would one adapt the 13b to enable hydraulic pitch adjustment?( the
soviets only used 2-5Kg/cm2 as the engine oil pressure.)


Sincerely brad


No need for a turbo. A port 13B would be 250 HP. The prop torque would be 570 foot pounds
with a 2.85:1 gear box from Tracy Crook.

Clock wise is a problem. The Tracy Crook gear box that spins clockwise looking at the
front is only a 2.17:1 ratio so that would limit prop torque to 434 foot pounds and HP to
about 200...220

Perhaps you do need a turbo after all.

Perhaps a 3 rotor would be a better choice.

Paul Lamar

Hello paul, our yak 12's are on the way and should land in the first week of July. The
idea as explained before is to put in a rotary 13b as 20b's are just not available. Will
it be possible to produce 300hp on the flywheel with around 0.4 boost?
Next the psru :
Is it possible to get a psru that will be reliable at 300hp ?
And still be able to keep the v530 paddle prop?
V1 the Al14R radial is at 2800 rpm
And the prop is at 1600rpm.
V cr is 2100rpm and the prop is at 1260 rpm.

Regards Bradly Banks.
South Africa.

There is no gear box for that prop that I know about.
What is the diameter?

Paul Lamar


Hello Paul in our project to convert our fleet of Russian crop dusters. I have
disassembled a vedenyev M14p engine. It is very slow running but built with classic
Russian overkill.
By reversing the planetary set I can get a 3:1 reduction whilst still retaining the
hydraulic variable prop arrangement.
My concern is the sun gear. All the gears in the set are straight cut and with an in put
of 6000-6800 rpm will the mesh cope?
The complete reduction unit is readily available from various sources .
Regards
Bradly Banks


WOW!!!!That gear box looks great for a rotary.
My guess is an 80 inch diameter prop with 7500 RPM
take off. I think the sun gear will be OK. Especially if you scale
up our new silicone rubber coupling design.

If you run a turbo and pump it up to 300 HP  at 6000 RPM even a larger
prop can be used. Make sure you install a turbo tachometer
and keep the sustained turbine RPM under 80,000.
Especially at high altitude where the back pressure is lower
and the turbo speeds up. You can exceed that for a few minutes
on take off.

The combination of high EGT (1800 F) and high RPM will
destroy a turbo.

The engine itself will long out live the turbo
especially with ceramic apex seals. My conservative guess is 1000 hours TBO
in heavy duty duster use. You will be the leading heavy duty rotary TBO
tester in the world.

Change all the tension bolts to 1/2 inch from 10 MM.
Mazdatrix can do that or a rotary drag racer in South Africa.
Makes a cannon proof engine.

What does something like that gear box  cost.

BTW do you know Alex Molteno? He flies for the UN.

Get one of my cooling books. Send me $50 US.

To:Paul Lamar
830 East Santa Maria St.
Suite 303
Santa Paula Ca.
93060 USA

Mock up the cooling system with Styrofoam after you get
the book and send me pictures of that. Oil cooling is critical.

When you get one of these flying let me know and I will come
down and go for a ride.

Bradly Banks

How about two C4 planetaries is series.
One with direction reversal and the other straight so as to have an overall reversal from
shaft to prop.
Could this be a solution for other higher RPM slower larger prop applications as well.
What are all the reduction ratio's (and rotation) possible in the C4 stable of gears?

Cheers

Steve Izett