Originally Posted by AUSELECTRIC
Maiden was last week, completely stock but used a 4.7x4.7??? Graupner prop I had lying around.
No problem with launch and glide was reasonable (it happened to be a foamy fly off at our club).
Only issue was with the motor mount that needed gluing after each landing. I will glue in some balsa to stiffen it up.
Suggest getting rid of stock mount ......... easily replaced with something like this :
Certainly cured my motor mount blues !! The above phots show my 550W set-up. My PKJ2 has same with 1.1KW power !!