I bought
this pair of used rotors to build up a new motor so I can retrieve my RV-6.
They look different in the compression chamber "tub" area, otherwise they
look identical. They both are marked "D" for the weight code. Can anyone
identify these and verify if they are OK to use ? I am thinking if the
compression ratio is different, it may run rough even if they weigh
the same. I remember Ed posting something about a way to measure the depth,
but I cannot find it in my sea of saved emails.
Hi Chuck,
As you probably know, the
rotors you use must also match the counterweights that you have. What
year, and CR rotors do you have in the current
engine?
Overall weight of the
rotors will tell the tale for counterweights, and will also narrow down the CR
identification to only two choices per rotor weight. Attached
is the weight and CR chart that I "borrowed" from Mazdatrix's
site.
Do you have the old engine
at home, or are you planning to build a new engine, then swap them in one
trip?
Good
luck.
Rusty (8 days
RV-8 construction, finishing empennage kit tomorrow)
Thanks for reminding of
that, Rusty - I was thinking of using the high compression rotors but I will
have to wait until I can find the late model counterweights to match, I will
use the low compression ones instead. I have had two motors, both are
1986 series 4 with the 9.4 CR rotors. I plan to build up one motor out of the
good parts that I have, and drive it to Texas and swap it out on site. I
will hopefully fly the RV6 back, and my brother will drive the truck back with
the bad motor. I have swapped motors enough times that I think I can easily do
it in one day.
Chuck