Anders, I am going to challenge your statement of the exhaust being spent. On a PT6-135A turbine used on Piper Cheyenne you pick up around 35 pounds of thrust per exhaust port (x4).
It is a similar setup (turbo shaft) / design, there has to be some amount of gain. Even if it is only to fill in the separation drag, there has to be something that can be used as a benefit. I doubt the air coming out of the exhaust is moving at a zero velocity too.
You are right, but given that the 135A has 5x the power output it leaves me with less than 30lbs of residual thrust. Nothing that can make any difference at all except melt the read fairing if the jet exhaust gets too close to it.
I will direct the exhaust at an angle backwards later when the fairings are made, perhaps 45° or so, any more and the bend might restrict the exhaust flow plus I risk heat damage to the rear of the bike.
Today I made the pitot tube so now everything is set for the upcoming test, I´ve even filled up the scuba tanks.
I used a 6mm 316 stainless tube reaching 2cm into the tube, I left a length of tube on the outside so the rubber hose would have a chance of surviving the heat.
And here is the gauge, ready for action! If the weather clears up I can do a test during the first part of the week, on thursday I will go to Tierp to watch the dragracing EM event!
Cheers!
/Anders