Hate to tell you this now but... My GTE has a 19M NW MPulse and I have about 1.5in cut from my keel tube to compensate for this issue. I'm told it's common to have to do this. That really sucks..... Sorry to see it.
We put a 19 meter Northwing mpulse on my BB Manta 503 and were about to do some taxiing tests when the engine was revved to start movement........the prop flexed and the tips conta...
...aining on an Apache 912 UL with a Quest GT5 wing (22hrs), switched to an Antares 582 with a 17M wing (12hrs) and soloed in my AC GTE 582 with a NW MPulse 1 19M wing for about 23 hrs....