Hye Eric,
Thanxs, that after burner is made by someone else for the owner, such a planes just need a after burner
And don`t worry about the exhaust pipe, we already made the dissension to replace the original pipe (90cm inner inlet diameter/75cm inner outlet) by a new straight Grummania or Jet Cat pipe with a mounted inlet piece.
I`ve contacted Grummania and they also said a straight pipe with 10cm inner diameter is the best (I believe Jet Cat talked about 9cm).
But I first want to place all equipment in the airplane, measure the CG, make some adjustment with the turbine and when the exact location of the turbine is decided I will order a pipe exactly on the length I need.
Greetz,
Berto.