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
--
I had thought long ago that that unit could be adapted to make a suitable rotary hydraulic cs psru.....in fact I got one long ago, with just that intent--but I think they all have splined prop shafts, a big limitation? I'd like to follow how this gets done! Brad, take notes and pics and let us know how it goes.....!
Marc  Weise



 Hello Milo, Here is the parts breakdown, exploded view ill try to get the part numbers to follow.
Brad

Thanks Brad, Milo
Does the box assemble have a part number?
The suppliers name, website, phone number, and address would be
helpful.

Milo