Username Protected wrote:
I still have a j-3 wood wing i had rebuilt 20+ years ago but saw one for auction and was curious if anyone had flown one, i have 24x11 tires and a c85 stroker by don's dream (107 dyno)machines with a longer prop I have a friend that modified his and put a supercub seat in the front, if i were rebuilding i would consider, maybe wing tanks instead of the standard(pro's and cons of both), you can also put a larger baggage area in while rebuilding
The problem with the J-3 is gross weight. No matter what you do it is limited to 1220 lbs max and many wood spar airplanes were less.1100 lbs to 1170lbs gross. They perform great with the C-85 and mods but in the end get too heavy to be two place. PA-11 has the same problem. Adding tanks, metal prop, adjustable seat, baggage, tires. They push 870-900 lbs empty
The J-3 / PA-11 structure and wing attach fittings are quite a bit lighter and different than the 90hp no flaps PA-18 and up.
Here is a good article on some structural differences in J-3s. Many times I have had new owners bring them by the shop only to learn they are not really 1220 gross weight airplanes sadly. The wrong size gear Cabane V bolts is the most common thing to spot.
https://www.univair.com/content/J3-Gros ... Di6kW9pnwPI wish someone would static test a full 1340 steel J-3 frame with all the updates and see if it would be possible to get to 1500lb gross. Same with a PA-12 to see if it were possible with no mods other than going to 4130 from mild steel parts to get to a higher gross.