Ihad a Big Stik 60. Ipowered it witha Thunder Tiger 91 4 stroke. I had a 15X6 prop on it. Ihad to mount 5 1/2"tires to swing the
15 in prop. It flew very well with the Thunder Tiger on it until the exhaust pipe broke. Itook the TTengine off and mounted YS91-FZ.
To keep the engine under control Iput a15X8 propon the YS.It would take off at half throttle and cruise around a couple clicks above
idle. Sadly, it met an unfortunate end this past January.

Ihave a Pulse XT60 thathas a OS91 AXmounted in it. The OSengine run perfectly untilIfed it some bad fuel and stalled. Itried to
doa dead stick landing. Ioverflew the runway and ran into a very large green tractor with a grater behind it. Sadly the rightwing broke in
half and the fuse broke behind theradio tray. The fuse has been repaired and the right wing is being repaired.

Ihave a test stand that Imount my engines in to get them into tune prior to mounting them into planes. It help the engine issues while at the flying feild.

James in CO