Hi Paul,



Today I inspected a turbine jet Rotorway 162F mainly because of the
Rotorhead that I wanted some measurement from

The owner informed me he had purchased a kit from KISS Aviation for
the Turbine

They provide a reduction gearbox at the back of the turbine reducing
from some 20,000 rpm

The engine produces 140 hp (I think)

The reduction box is quite tiny, as can be seen in the photographs

The owner informed me that the 90Degree drive is a differential from
some sort of race car which was one of my original idea’s  to use a
9” Ford

the engineer I spoke with about my idea is the guy who designed the
D2 which didn’t fly.he said wasn’t a good idea and wanted me to use
his Planetary design

However a 9” Ford diff crown wheel and pinion which produces many
ratios, there is a place in USA, Strange Engineering   Morton Grove,
Illinois

They are suppliers of transmission components and can supply a
lightweight centre ( picture sent) for the 9” Ford Diff about
$1500.00

The diff for the EXEC cost $35,000.00 I am wondering if anyone can
identify the differential. Pascal told me it came out of some sort of
race car but

Didn’t know exactly what.

Any comments once again would be appreciated, any better solutions
would be tremendously helpful such

something already manufactured.



This is website for Turbine Kit

Turbine Helicopter Project - JetExec
<http://www.jetproject.rdswebs.com/page2.htm
<http://www.jetproject.rdswebs.com/page2.htm

/www.jetproject.rdswebs.com/page2.htm/
<http://www.jetproject.rdswebs.com/page2.htm/

View shared post <https://www.google.com.au/

I must say that the support has been excellent from *K.I.S.S.
Aviation*. When a problem or weakness is identified, Dave Domanske is
immediately finding and *...*



Regards George  Crooks from Aus


That looks like a sprint car or midget race car rear end. A midget
race car  is just a smaller sprint car. Sprint cars have some other
parts that would work like hollow axle shafts.

http://en.wikipedia.org/wiki/Sprint_car_racing
<http://en.wikipedia.org/wiki/Sprint_car_racing

Please don't send doc file pictures George. Save them as jpgs. You
can export them from doc files. I had to do it.

Paul Lamar

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The left photo is of an Al Ford 9¨ carrier. Strong and well
developed. Lots of ratios available. The problem with these is the
gear cut takes more HP to turn them. That is the difference compared
to the Ford8.8 diffs.

The sprint car racing diff is a nice piece, but expensive due to
limited market. It also has the quick change ability built in which
you do not need and it adds weight.

Available from FRPP is the diff housing from the Ford IRS system.
They do not recommend more gear than 3.27 but that is for cars. Guys
running 3.73 or 4.10 will have a tendency to let her rip now and then
which puts a high shock load on things. In the helicopter it is a
high but continuous load. It is fairly inexpensive and a 4.3 ratio
should be able to be installed. It should also be fairly simple to
devise a cap for the lower end when turned on its side so oil can not
leak out past a flooded seal. Then with a primary 3.17 planetary
reduction made from the Ford planetary parts. will get you 13.6
reduction which is close to your original 14:1. An over run or one
way sprag clutch will look after engine out if required to auto
rotate. Cost on this should be fairly reasonable compared to other
options.

Just looked at the FRPP website and do not see the IRS housing any
more. Should be able to get from the parts dept as they were used in
the Mustang Cobra and Lincoln. Recyclers have complete IRS for about
$1500. You may be able to part out just the diff assy. Found the FRPP
housing on the Summit web page

Heidts also makes an IRS Al housing to use the 9¨ diff parts. Al
pumpkins available also.

Then there is the Jaguar IRS which are readily available.

Dale Davies


Paul and friends,

How do we know the rated rpm and torque for the Ford planetary system?  Do we know the material used for making them?  It would be rather hard to decide on which gear fits which application without such data.

Gordon Gao

No I do not. All I now is it it used in the Ford power stroke diesel truck.
650 ft pounds of torque.

Paul Lamar