12 d

 The latest youtube video of the TTC.

 Unfortunately I was at Aero :-)


 https://www.youtube.com/watch?v=k_gedJrWbT4

 time to climb 1 40

 Official TIME TO CLIMB FAI world record! 1'40"!

 Paul Lamar

 Hi Paul, Once again a superb job. I seem to have lost the email
 about the size of the heat exchanger  for the water cooling, Do you
 have the cubic inches per HP that is required?

 Andrew Campbell. NZ

 We used to think it was 600 cubic inches for about 250 HP  but
 recent experience maybe 500 is more like. A lot depends on how it is
 installed. A good wedge diffuser is essential.  Do you have my book?

 Paul Lamar

 Yes I did have your book but I lent it to John Shuttleworth who is no
 longer with us,  I do have the emails and photos of the diffuser
 that were posted here. Thanks that gives me a good Idea on the size
 required for my 130 HP.

 Andrew Campbell NZ


    Do you have any data on the grade of steel for the prop Shaft?
  Andrew Campbell. NZ

No not for sure. It was built seventy years ago. Probably 4130.
It is way over kill for the TTC as it was the main shaft for a helicopter.
4130 has been around since the 1930's.

For the 2 rotor.... 2 inch  dia, 3/16 wall 4130 tube is about right.

Paul Lamar


------------------------------------------------------------------
Please  add your questions or comments  at the end of the thread. Not the beginning.

I am going to enforce that rule. If people don't do that it will not be published. My ISP changed the rules.

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
YouTube  Key word "PaulLamar2".
Copyright 1998-2018 All world wide rights reserved.