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[FlyRotary] Re: New rotors, New
housings
I wouldn't think about putting an
engine together without shaving the rotors, I cut 15 thousandths of an
inch at the tip and tapper it off to zero where the blueing
is.
I have thought about running a RX-8
engine but I don't think the high compression would work well with the
100 hp increase of nitrous I require to lift a heavy load out of the
water.
Ken
Ed,
Ken's
comments reminds me to say that I remeasured the width of the RX8
rotor for a more accurate measurement and it appears after a number of
measurements that the RX8 rotor are only slightly wider, this being
.04mm in the gear area and only .02mm at the apex.
This I
believe won't be a problem at the RPM and power settings we generally
use. However it would represent a small problem in Ken's
application as he uses NOS at take-off and at that high power the
E-shaft does flex a little - this causes the rotors to skew slightly,
binding at the apex areas. Ken already has this problem with the
RX7 rotors and skims them to eliminate this problem. This is a
remedy that many in the racing game use as well.
I
don't believe there's a problem with the single rotor application and
won't be skimming the rotor.
Hope that
helps!
George (
down under)
I would look into getting 85-85 GSELE rotors with
the 3 mm seals, you would also need the weights to match them, then
machine out your rotors for a spare engine, you may need one to bale
you out in the future, if you keep this up you may knock me off the
seat as president of the dead stick club.
I am now running rotors machined out to 3 mm seals
and at about 400 hrs on them I can tell by checking through the
exhaust port that the seal grooves are getting V'ed out and getting
sloppy so I am now putting another engine together, on this one the
rotors are in prime shape so I think I will run Tracy's 2mm
seals.
Also I think that the groves may be hardened and by
machining the groves out makes them softer as they shouldn't have worn
out in only 400 hrs.
Ken
Well, the
decision has been made. Thanks in part to the wife's continued
interest in my warm body on cold winter nights, the decision has
been made to purchase new rotors and rotor housings. $$ but
apparently I am worth it {:>)
I looked into milling out the
slots to 3mm and that would have been the cheaper approach - but cheap
approach is probably partly responsible for me being in this situation
- so going to try a different approach this time. Besides leery
of using a rotor which clearly has been subjected to sufficient loads
to scrape metal off its surface and peen over apex slot.
In the process of getting
quotes.
Ed
Ed Anderson
Rv-6A N494BW Rotary Powered
Matthews, NC
eanderson@carolina.rr.com
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