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
Milo,
There is a company in the states that deals in these engines
http://motorstarna.com/
George coy is the guys name. I'm waiting for a price right now on an entires unit.
They are still making the engine and parts for them (in small number)
so it might work for us. Crossing my fingers the price won't
be ridiculous.
I'll let you know
Will