Hello Paul, Can you tell me which flywheel is the correct one to fit
to a RX8 engine. I have removed the manual flywheel. Do I need a
balance section from the automatic engine as well as the flywheel.
Your help is appreciated . Regards
Mark Dillar
You need an RX8 automatic transmission flex plate and counter weight.
Don't use Tracy's flex coupling. It over stresses the flex plate and
may cause it to crack. Of course you can buy an after market
expensive chrome molly steel flex plate/flywheel. That is what Dave
Leonard did.
Or use one of our couplings like the one used on the TTC engine.
I have some water jet cut parts left for the steel version. Weld it
your self.
Paul Lamar
Thank you Paul, It's early days for me working on the Mazda so I
shall start the search for the flex plate and counter weight. I
shall hold on the coupling but will go back through the emails to see
the pictures of the ttc coupler Thank you for the information that I
do get from your News Letter and I hope you don't mind if I should
forward further questions to you
Mark Dillar
I sent pictures of the TTC coupling. Did you see the aluminum
version? That was the TTC coupling. If you are using a cell phone
they sometimes are limited to the number of pictures they will
download.
The TTC coupling could be half the length for an ordinary two rotor.
The diameter would be the same as it picks up the six high strength
bolts in the counter weight.
The stock E-shaft and counter weight are way over designed for a 250
HP normally aspirated p-port 2 rotor. I suspect 1500 HP would be no
problem. The three and four rotor turbo's are using the same parts.
Here are some more pictures of the TTC coupling. The flex plate
shown is an after market aluminum version.
Paul Lamar
Got them thanks Paul. Both the plate and the coupling are really
nice. Looking back , a coupling like your steel coupling would be
ideal for my requirements Is the rubber available easily?
Mark Dillar
It is in the states from McMaster Carr.
I can mail you a block to the UK if necessary. It is easily cut with
a band saw or hack saw. It can also be drilled to soften it.
Here is a scr capture from McMaster.
Paul Lamar
How much would I be looking at, in round figures, for you to send me
the water jet cut parts and the silicone Paul?
Mark Dillar
I am not sure about the postage. The parts and the silicon would be
$50 US cash in the mail. I have enough silicon left over from the TTC
project so no Macmaster Carr $50. I'll get back to you on the postage
cost.
I redesigned it in metric so you can get the rest of the parts in the
UK. The Formula 1 constructors must have a bunch of metal suppliers
that they use.
Do you know my rotary engine friend Eamon Hurley in Coventry. Is he
he still alive?
He stepped off his rotary powered bike at 175 MPH and lived to tell
about it years ago :-) He can help you a lot.
What are you going to use for a gear box?
Do you have 3D drawing software?
Paul Lamar
Hello Paul, That sounds like the best option to get me forward on the
coupler. If you let me know on postage and how it is best to pay. Do
you use Pay Pal ? I read where you recommended your friend Eamon
Hurley sometime ago and I jotted down his details (Arbury Avenue etc)
. He is pretty much due east of me when I am at home. I didn't want
to impose on him until I had a particular problem that I couldn't
overcome otherwise.
Strange that he should want to abandon his bike when at full chat. I
would have thought he would have been enjoying it to much to call it
quits. I stepped off a train once as a young lad when it failed to
make a full stop at the station I wished to depart at ( a station in
Sydney) and I made a rather heavy and ungraceful landing. Fortunately
only the conductor and I witnessed it as it was in the small hours of
the morning. My landing was softened by a copious quantity of Aussies
best nectar so nothing really hurt until the next day and I was able
to give the conductor a good piece of my mind about stopping his
train where I wanted it stopped or something to that slurred effect.
Anyway I hope your friend has healed well from his moment of
embarrassment .
No I don't have any 3d drawing capability. Computers and electronics
I have never grasped with both hands. I've got a good, well sharpened
pencil. My imagination also seems to work well in 3d.
Haven't got as far as the psru yet. I do have some about but most
are for lower power requirements. I have the psru from a Thielert
diesel as used by Diamond aircraft and fitted to some Cessna 172's
but it is 1.7 :1 if I recall correctly . I am keeping it in mind as
it could run a constant speed prop and I did pick up a MT composite
two blade that may or may not be of any use. Perhaps the ratio of
that psru is not enough to take advantage of ultimate Mazda hp but I
only need in the region of 130hp initially. Like everyone else weight
is a big concern and I don't know if I can keep the weight down
enough for this project.
Mark Dillner
The bike went into handle bar extreme shake mode :-)
Forget 1.7 for a rotary. It needs to be at least 3.1. The Thielert
box is heavy and designed for an inline piston engine. It also fails
when powered by a diesel :-)
The rotary is so powerful you don't need a constant speed prop. Just
set the pitch for best cruise. A ground adjustable is great.
Go to any auto tx repair shop in the UK and ask to see any used
parts from a rear drive small truck or large car. You are looking for
a rear planet carrier with the sun gear and ring gear. The sun gear
diameter should be half the ring gear diameter or there about. The
cost should be less than about $200 US or the equivalent in pounds.
If the parts are in bad shape you can always oder new ones from the
tx shop.
Take some pictures with your cell phone and send me the model number
and car or truck name it came out of. I'll get back to you with a
design. Hurley engineering can help you if you say it is for a rotary
powered boat or airplane. They have all the machine tools needed.
Then they sell it to others in the UK. Or you can buy one from Neil
in Oz.
I don't do pay pal but if you go to Lamarinstruments.com you can make
a contribution to the TTC project with a credit card.
-----------------------------------------------------------------------------------------
Here are a couple more 3D's.
Paul Lamar
Along with the counter weight that's what I need next
Cheers
Mark Dillner
Hurley should be able to help you there.
Paul Lamar
Paul, did I read way back that an RX7 flexplate could be used on the
RX8 and if so could the counter balance of the RX7 be used also? Mark
Dillner
The flex plate is probably OK. There is new casting technology in
the RX8 rotors so they are probably lighter therefore an RX7 counter
weight may not be balanced. You might have to have the engine
rebalanced by Hurley Engineering.
I'll send this to Dave Lemon at Mazdatrix. He will know.
Mark is in the UK Dave.
Paul Lamar
I tried to make a donation regarding the silicon and coupler just now
but card details don't seem to match up Paul. Firstly I am attempting
to use a debit card. Not had a credit card for many many years now.
Also I don't know what the CVV or Zip details are. Can you help? Mark
Mark Dillner
Yes I remembered that after I suggested it. It does not work overseas
if your postal code contains characters like M, X, B, ext.
The postal code must be 6 numbers. In OZ and NZ one can add zeros
in front of your regular postal code to make up the difference.
We will fix that eventually. My website Guru is on vacation and won't get
a chance for a couple of weeks to work on it. It is a matter of changing
the financial institution that verify's credit cards.
If you have an international airport nearby they can change currencies.
Not all banks in the US or over seas will do that. More banks overseas
will do that where
US tourist can be found :-)
Then mail it to;
Paul Lamar
830 East Santa Maria Street
Suite 303 <<<<<<<<<<<<<<< Very important
Santa Paula Calfornia
93060
Paul Lamar
Perhaps my bank can provide an international money order that you could
cash at your bank . I will try asking them when I get back from work
next week. So I can make sure that I cover postage and donation as
well. ( you were saying the coupler parts and silicone block would be
$50 ?) I can make sure its enough all in one go
Mark Dillner
OK Mark Thanks
Paul Lamar
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