When we ran the engine for the first time we noticed a distinct lack
 of boost. It did  not occur to us to take the turbo apart and check
 it. The turbine was missing blade area. This happens when a small
 foreign object goes through the turbine while it is rotating at
 100,000 RPM. Nothing new here as the  CW R3350 TC would do the same
 thing when an exhaust valve broke up.

 When you just look at the exducer everything looks OK. We checked
 the compression on the TTC engine and it appears to have full
 compression on all chambers so it did not happen after we had the
 engine. I am building a Maximite rotary engine compression checker to
 get a better handle on that.

 Apparently, some time during the development process, an iron apex
 seal failed and took out the turbine. It is easy to forget and not
 check the turbine when that happens.

 Subsequently Iannetti ceramic apex seals were installed and they are
 cannon prof. Mistral intentionally detonated the engine and the
 Iannetti's  failed to break. The same thing cannot be said about the
 stock seals.

 A new ball bearing Inconel turbo cartridge cost $2400 so small
 donations would be welcome.

 Paul Lamar 830 East Santa Maria Street Suite 303 Santa Paula
 California 63060

 Paul Lamar


 Keep up the good work , without people like you our beloved rotary
 motor will drift into extinction.

 Barry Dowse

 Thanks Barry, I am still learning stuff every day.

 It amazes me it has taken so long to get accepted by the aircraft
 industry. Supposedly  Pratt & Whitney  Canada is getting the most
 rotary engine new patents recently. From what we have learned on
 this TTC project it will make a good PT6 replacement. In theory it
 will have much better high altitude performance. In WW II turbo
 charged piston engine fighters like the P38 and P47 where getting up
 to 40,000 feet.

 Paul Lamar


 Paul,  this project has ramifications for everyone with a rotary.
 Already to send you money as advised earlier, so $50 to the TTC from
 me.  Keep at it you must win!

Neil.


Yes I know. Larry Childs is working on a four rotor with a one piece
E-shaft. Larry has a new NC lathe big enough to machine the shaft
out of a chrome molly billet. A main bearing on each side of each rotor.
The main bearings will be better supported using a configuration
out of the past found in  Offenhouser race engines. One of the most
successful in race engine history.  In the current Mazda 2 rotor engine with only
two main bearing there is a bit of bending in the eshaft at high RPM
 causing the rotors to cock slightly in the rotor housings.

The cooling system will be changed so each rotor housing will be the same temperature
unlike the current Mazda where the rear rotor housing runs hotter than the
front housing. In a Reno racer we figure at least 1400 HP.

BTW I am very pleased with the performance of the TTC cooling system so far.

Paul Lamar


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