|
Kelly,
Yep! your right, I was referring to the matching
code. I mentioned this in case anyone would take rotors from different sources,
however if they came from the same engine their likely to be
matched.
I don't know how the counter weight is matched, I
have seen and heard of rebuilds that do all sorts of things and even balancing
which is not as good as factory balancing. I believe it's to do with what's (
what weights)allowed for in the physically balancing.
For those uneducated in the physical balancing
process, the e-shaft is spun up with dummy weights (bolted onto the e-shaft
lobes) that represent the weight of the rotor, all seal weights ( except
apex seal and spring) and the oil in the rotor. The counter weights are then
adjusted for best balance. Adjusting involves adding or removing metal from the
counter weights. I don't believe static balancing is accurate enough fro a 2
rotor ( because of the rocking couple) but might be good enough for the single
rotor. I believe that's what Richard Sohn has done to date for his single
development.
I think if we take parts from other engines ( as I
am doing ) it would be advantageous to know the variance of the code system. I
believe someone was working to identify what the difference in code represented
in weight - but no final outcome to my knowledge. If we could also nail down the
weight of the corresponding counter weight it would solve a lot of problems for
experimental builders. Instead of matching things we could just weigh
them.
Is there any information you can give on different
weights from your 3 sets?
George ( down under)
George,
I presume you are making reference to the letter
(A,B,C,D) weight code for
rotors........Engines that have not been opened (stock) will have matched
weight
rotors within one letter of each other (that is
AA-AB-BB-BC-CC-CD-DD)......
I have not heard of such a weight code for the counterweights but
I stand to
be educated if there is one.......I have managed to collect 3 sets
of 89-91 rotors
(9.7 to 1) with matching weight codes.........FWIW
--
Kelly Troyer
"Dyke Delta"_13B
ROTARY Engine
"RWS"_RD1C/EC2/EM2
"Mistral"_Backplate/Oil Manifold
--------------
Original message from "George Lendich" <lendich@optusnet.com.au>:
--------------
Kelly and All,
Even when the weight of the rotors and the
counter weight are confirmed as being compatible - one should also remember
the lettering stamping system which matches a paired set, for balancing
through similar weight. I have never been able to confirm what the
difference in weight is exactly, which is a shame.
George ( down under)
Joe,
One other consideration........I have presumed
your 89 13B was a NA (6 port)
and not a Turbo (4 port) engine........Although the NA and Turbo
rotors are the
same weight the Turbo rotors are 9.0 to1 comp. ratio.........(the end
I hope)
--
Kelly Troyer
"Dyke Delta"_13B
ROTARY Engine
"RWS"_RD1C/EC2/EM2
"Mistral"_Backplate/Oil Manifold
--------------
Original message from "Kelly Troyer" <keltro@att.net>:
--------------
Joe,
Yes the 3rd gen counterweight will
work.......Just make sure that that your 89 rotors
are actually 9.7 to 1 with the machined depressions.........To my
knowledge Tracy's psru
only takes the 2nd gen flexplate flywheel which bolts right on any
of the counterweights..
.........Bulent used a 13B Cosmo flexplate (it is like the 3rd
gen) but he used the Cosmo
bellhousing and a custom extended input shaft and had to make an
adaptor to his flexplate
for Tracy's psru torque isolator........The Cosmo and 3rd gen
automatic flexplate uses a
side mounted starter........As usual I bow to anyone for correction
if my info is faulty........
--
Kelly Troyer
"Dyke
Delta"_13B ROTARY Engine
"RWS"_RD1C/EC2/EM2
"Mistral"_Backplate/Oil Manifold
--------------
Original message from "Joe Berki" <jskmberki@alltel.net>:
--------------
Thanks,
I have a 89 and a earlier motor 88 or
86. I want to use the 89 internals and irons if they measure, so
what you are saying is that the 89 has the same weight rotors as 3rd
gen and can take the 3rd gen flexplate and counterweigth? But what
about using Tracy's PSRU? Is the 2nd gen flexplate the only one
that will work?
Joe Berki
----- Original Message -----
Sent: Tuesday, February 05,
2008 8:36 PM
Subject: [FlyRotary] Re: Flex
plate(adendum)
Joe,
Forgot to add this.........It depends on the year model
13B also........The 86 to 88.5
2nd gen had heavier rotors and what I reported is
true.........The 88.5 to 91 2nd gen
13B have rotors the same weight as the 3rd gen and should be
able to use the 3rd
gen rear counterweight.........You have to be careful with the
88.5 to 89 2nd gen to
make sure you have the lighter rotors (they are 9.7 to1 and
have a machined rather
than a cast depressions in the rotor face)..........Sorry for
the omission..........
--
Kelly Troyer
"Dyke
Delta"_13B ROTARY Engine
"RWS"_RD1C/EC2/EM2
"Mistral"_Backplate/Oil Manifold
--------------
Original message from "Kelly Troyer" <keltro@att.net>:
--------------
Joe,
A 3rd gen counterweight and flex plate will fit
2nd gen 13B but the counterweight
will put the 2nd gen out of balance unless rotors and both
counterweights from the
3rd gen are installed also...........On another note if this
engine is for an A/C using
Tracy's redrive you must use a 2nd gen
flexplate........FWIW
--
Kelly Troyer
"Dyke
Delta"_13B ROTARY Engine
"RWS"_RD1C/EC2/EM2
"Mistral"_Backplate/Oil Manifold
--------------
Original message from "Joe Berki" <jskmberki@alltel.net>:
--------------
Will a flex plate and counterweight
from a 3rd gen 13b fit a 2nd gen 13b? How much for a flex
plate and counterweight? Thanks for any help.
Joe berki
Limo EZ
No virus found in this incoming message.
Checked by AVG
Free Edition.
Version: 7.5.516 / Virus Database: 269.19.20/1261
- Release Date: 2/5/2008 8:57 PM
No virus found in this incoming message.
Checked by AVG Free
Edition.
Version: 7.5.516 / Virus Database: 269.19.19/1256 - Release
Date: 2/02/2008 1:50 PM
No virus found in this incoming message.
Checked by AVG Free
Edition.
Version: 7.5.516 / Virus Database: 269.19.21/1263 - Release Date:
6/02/2008 8:14 PM
|