I needed a long center punch to locate holes in the manual
waist gate I am making for the the 650 HP TTC turbo Wankel engine.
I could not find one in Ventura.

All I could find was Brad Point drills normally used to drill wood.

I said "self, lets try one on aluminum" it worked better than a center
drill. It is easy to locate the sharp point exactly on the cross hairs. Far, far
more accurately than even a small center drill. Its long as well
no need to change the distance to the chuck when replaced by
the actual drill. I ground the unneeded metal off around the Brad point.
It would not work in aluminum as a drill  anyway.

We can use the failed waste gate we have now and couple it to this AC Spruce vernier mixture control
cable.  We needed  a right angle mechanism as the fuel tank is in the direct way.
The cable will move twice as far as the gate. The gate moves .75 inches.

"The A-790-12 vernier mixture control is approved for Cessna 172, 172A thru Q;
Cessna 150, 150A thru M, A150K, A150L, A150M;
Cessna 152, A152.  Order by  Part Number and state Cessna
model and serial number. A790-12 is 53" long."

"Special length Controls available per foot. 05-13280 $4.88/ft"

"Cable set-up fee for extra cable length."
"1ft to 10ft. 05-13276 $15.00"
"11ft - on 05-13277 $40.00"

Almost done on the manual waist gate. I will publish pictures
as soon as it is done. Can't wait to try running the TTC engine
with this manual waste gate.

You can take off with the gate wide open and close it slowly as the boost builds up to
the full 650 HP and 80 or so inches of HG manifold pressure.. That is 25 psi  of boost.
Enough to turn any piston aircraft engine into a hand grenade :-)

Not the cannon prof Wankel rotary however.

Paul Lamar

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