Hi everyone,

   I coach Junior College football and that is a 7 day a week job for now on top of my regular 8 hour job.So 14 hour days do not give me much time to play with model  planes.  I have purchased the Extra MX it is 28 oz without any cl mods. I am about finished with the Katana MD. If a person wanted to strip the covering it would be much easier to make all the CL Mods. These airplanes are extremely well made and rigid. Carbon fiber reinforcemnts all over the place.

This one would be a great electric cl plane!!!

Dallas

Earlier this summer I did an experiment with a similar plane, a Hyperion .46 size extra. Like the PA Extra it is one of the new generation of thin wing 3D RC planes that fly so very well and seem to be very resistant to stall and since in RC 3D we fly them considerably slower than in CL PA I wanted to see if the longer fuse and the other factors made them useable. I powered with an Axi 2826/12 electric. I have a fair amount of experience with electric in RC and CL so it was a natural. The power system was more than up to the task. No issues there. Hyperion is another of the upper quality arfs out there and weight while not quite as light as the Precision Aerobatics planes is very close. (I have already done a Precision Aerobatics Katana-mini coversion and just finished build of RC Katana MD and have the Extra MX next on the RC board so I am familiar with the weights and construction.) I used a Morris bellcrank, and multiple pushrod control system with seperate horns for each flap.

Tests were conducted on 63 ft lines. Probably did a dozen flights in the series with another expereinced electric stunt flier, Rick Sawick, and Frank Carlisle. We all three did the trim adjustments and evaluation flights including video for review to confirm what we thought we were seeing. In short the experiment did not succeed. Even at the higher CL speeds we encountered wing stall in corners that was not correctable with the wing. The Precision Arobatics planes have similar airfoils and moments and I would expect the same. As I said it was an experiment not an attempt to create a world beater. Your milage may vary but hope this helps your evaluation or the concept.

bob branch

John

Yes I agree. It was one of the variables we evaluated and adjusted in the test flights. One of the nice things with electric is you don't have to work on engine runs and shims to test. We knew the power system settings from other planes, plugged in the settings and flew the test flights. With 2 minute flights and no need to refuel you can do alot of testing in a small time.

bob

Dallas

Glad to help.

bob