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
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
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 know is it it used in the Ford power stroke
diesel truck.
650 ft pounds of torque.
Paul Lamar
Hello all,
Many thanks for all your suggestions and help I am sure it will all
be of value to me shortly
The actual torque of my helicopter is being calculated this weekend
and the greatest torque will be
At full cyclic (so I have been informed), all will be taken into
consideration, however if the sprint car box has been used in the
Jet Exec Kit then it is possible to find something already
manufactured for my Scorpion Mazda 200hp Turbo.
The only thing I would look for would be a pinion which is central
to the shaft(axel/spool)
If anyone knows of something I would be very grateful.
Many Thanks
George Crooks from Aus
IMHO the sprint car stuff is OK for a piston engine as generally
they are much lower RPM. In the range of 2700 to 5000.
For a rotary powered helicopter it is hard to beat a 20:1 worm gear
as we are talking 7500 to 8000 rotary RPM to get a decent power to
weight ratio.
Most turbine engines come with built in planetary reductions
so the out put is n the prop RPM range. In that case a sprint car
rear end
would be useful.
If you want a rotary powered helicopter that out performs
the common piston engine helicopter take advantage of the high
power to
weight ratio, high RPM of the Mazda rotary engine. It will
beat the turbine helicopter hands down on lower fuel burn.
Paul Lamar
Gordon, The E40D 4 pinion planetary s are made from hobbed
(machined) gears and also from powder metallurgy (sintered). All the 6
pinion
planetary s which you would be using are machined as far as I am
aware.
George Grimes
I do not know they are made from sintered gear, really an unbelievable
deal. We can just order a whole set from Slauson? Or do we have to buy
from a Ford dealer? I know Paul sold one a while ago, but that was a
one off deal. I did not follow the whole thing from the beginning, but
are there prop shafts offered to the group? I might need one that is
driven by the carrier.
Best regards,
Gordon from China
I can order them from Slauson. I am in Germany right now so when I get
back on Monday
I will order 2. One set for Neal and one for you. What part of China are
you in. Henry is in
shenzing.
Paul Lamar
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http://www.rotaryeng.net
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