The plane specs: span = 40in. length = 28in.
weight = 30 oz. wingloading = 15 oz/sq ft. chord = 7in. aspect ratio = 5.5
airfoil = Clark Y

This is a high wing trainer so it doesn't need to be fast just be able to climb nicely.

I plan to use a Lipo. The actual plane doesn't weigh 30 oz. it is just an estimate for when all of the UAV equipment is in it.

The equipment for the initial rc flying is around 4 oz. including a motor estimated at .88 oz. I am making it out of blucor foam so it should not be to heavy. I'm guessing it would really turn out to be around 15-20oz. with radio gear. Which would bring the wing loading to around 7-10oz./sq ft. I just want to have a little extra power in case I want to put a few ounces of electronics on it.

Do you think I need more wing area? Do you think 15 oz. /sq ft. is a lot. What do your foam parkflyers usually come out to? Thanks for your help

P.S. I have a 1300 mah 2s Lipo and a 1100 mah 3s lipo but if these end up I think they are rated at 8c and 10c respectively. But if these won't work I'm willing to buy a new one for my new plane.

Does anyone have a suggestion about the amount of thrust I'll need to get this plane flying? Any help would be greatly appreciated. THANKS

Andy Goessling
[email protected]

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No takers?
Here is a little info - On this size plane -keep wl under 10 oz sq ft - go for lower if at all possible
as for power setup you need to look at motor and batt as a unit - these are extreme differences in these combos -the efficicncies on older mottors especially brushed ,can be terrible.
for a trainer style flying - try to have static thrust as close to 75% of auw as possible.
We run 2-1 on our park flyers but these are very quick ,active models with wing loadings under 5 ozs.
If your wl is reduced - your pl can also be lower
said simply -lower wing loading allows less power to keep it in the air