REFLECTOR:exhaust system, my solution

reflector@tvbf.org reflector@tvbf.org
Sat, 12 Jul 2003 17:23:11 EDT


 See photos at "photos.yahoo.com/n19dw", click on "Velocity" folder, then on 
each picture to enlarge. 
System is 3 individual pipes on each side that direct exhaust down, then bend 
45degrees up to exit cowl in an aft direction. Each pipe is one piece rigid 
with no slip joints, springs or supports, but each has a safety cable. Pipe 
lengths are from 10 inches long to maximum 20 inches, minimizing heat expelled 
inside cowling. 
Advantages:
1) No hot pipes in fwd section of cowl and therefore no possible breaking 
pipes and fire in fwd cowl.
2) 6 individual pipes minimize exhaust back pressure to give best breathing 
for each cylinder. 
3) Closest pipe exit to MT prop blade is 15 1/2 inches which produces almost 
no deposit on cowl and very slight glaze on prop.(See photo 6) Note: crankcase 
breather exit tube clamped to right fwd exhaust pipe. Don't have to worry 
about that tube freezing. 
So far 43 hrs on this system with no problems or cracks. 
Don White   N19DW   XL/RG