It is an experiment, your experiment. If you want to up the weight you carry in the plane do it! Unless it is a factory built LSA then there is NO Gross weight other than that "reccomended" by the factory. They have no idea if your going to do a shitty build job or not so there is some "fudge" factor in there. At the end of the day, these planes are NOT CERTIFIED to ANY standards that would really apply to factory built planes.
You can go down to the hardware store and cobble together a EMT conduit and cover it with a tarp and still be legal to fly the thing. NOTHING is said that you have to use certified materials, certified techniques, or a certified mechanic.. you build them in the garage or the living room, some guy comes out and looks it over and gives it his best JUDGEMENT that it wont fall apart while you are beating the air into submission, and away you go to do your flight testing.
OK, so here is where it gets good.. Do you HONESTLY think that everyone does flight testing like we are getting ready to lauch a new fighter aircraft... Um, NO. Guys take off, and if all goes well the first flight and the plane does not beat the ambulance to the scene of the crash, they will go up and do some stalls. Some will record numbers, but most just kinda try and remember the numbers when they land. There is no hard fast regimented flight testing program for a low slow flyer. If I was building a thunder mustang or some high zuite go fast turbine powered retractable rocket, I may be a bit more inclined to go A HELL OF ALOT SLOWER on the flight testing, and test out one system at a time till I am sure everything plays well with each other.
Guys doing weight testing while in phase one.... I got a pay check that says 90 + % of the guys that build the plane and do their own flgiht testing dont just bump it up in 25 or 50 # load increases until they hit gross. I would even venture to say that most dont really put the weight on a scale to assure that they are DEAD on the weights. They take off the first flight solo with half, maybe full tanks, if all goes well, they burn the hell out of the sky and may put some weight in there just for shit and grins while doing phase one... maybe not! I cant tell you how many times I have heard "damn, when I got my phase I done and actually got to fly a passenger, I cant beleive how much the performance decreased". That pretty much tells me that they NEVER. loaded that plane up to gross in phase I.
Take it for what it is worth, but I can tell you that the FAA paperwork does not have a gross weight listed so you can put what ever you feel like in it and fly as long as it is in the published CG range. There have been soo damn many "gross weights" on the Avid and KF line that I dont think anyone can honestly tell you what the older model planes are really good for. If its not blowing 90 out and is smooth air, I will load mine down. If I know it is gonna be bumpy, I pull the power back a bit and dont load quite so heavy.. Easy enough for me.
Don't expect me to be politically correct....
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