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
Paul you may recall my RX8 engine was built by Bruce Turrentine
and I
have Tracy's 3.12 redrive with its standard components, including
the
automatic engine flex plate.
Based on the above, I'm assume it would be wise to replace
Tracy's
couplings and/or change the flex plate? I searched the Internet
and
did not find any aftermarket flex plates for an automatic,
although
there are many clutch plate / flywheel versions available.
Do you have any specific recommendations other than in this
thread?
BTW, I'm still working on the cooling system options for my GG.
While searching for small and thin radiators, I found some of the
racing motorcycle radiators are curved, and might give additional
options provided I can achieve enough surface area and volume.
Scott Gettings
There is nothing wrong with the flex plate doing its job of
starting
the engine. Just don't bolt anything to it. The car is not
subjected to the gyro
forces an aircraft experiences.
The main six bolts that hold the flex plate and the coupling are
.385 inch
in diameter. Ten millimeters. They are more than strong enough to
handle
about 1000 HP.
Here is the light weight steel flywheel Dave Leonard settled on.
It is forged chrome molly or
something cannon prof like that
I think it is an Exidy brand from Mazdatrix.
Don't worry about the flex plate.
That motorcycle radiator might work in a counter flow
configuration.
Send me the dimensions and pictures.
Did you make a final decision on where you want to place the rad
cores?
I still think the cooling scoop in the canopy and rad cores
mounted on the back panel
is the best bet. It turns a aerodynamic problem into a cooling
advantage.
I would be the first aircraft with a engine cooling scoop in the
canopy
I would also allow streaming lining the engine better.
Paul Lamar
The Rotary Engine free News Letter. Powered by Linux. If you want
off
the list PLEASE let me know and I will remove you. ACRE NL web
site.
http://www.rotaryeng.net You
Tube
http://tinyurl.com/beqqxas
Copyright 1998-2016 All world wide rights reserved.
