KevinKRC

I was looking to make a small electric plane with an airfoil. I was not impressed with the flight habits of the flat winged foamies so I started thinking about what planes I like to fly. I had two Sign Wonders a few years ago, one wood, one coroplast both met their end in high speed impacts with mother earth, but I liked them while I was flying them.
I have 50 foot folded sheets of blue DOW foam that I have been experimenting with, so decided to combine some coroplast techniques for wings with the blue foam material and make a SIG wonder foamy.

It turned out great. 15.8 oz, with a E-flight 400 external rotor motor, a castles phoenix 25 controller and a 11.1 li 1200mamp pack it's just what I was looking for.

I've got some photos to upload and as soon as I figure out how I'll post them.

KevinKRC

vicman

My Feedback: (10)

I liiike it!

KevinKRC

I just figured out this weekend that I had underpropped this plane. I was using a 7x5e prop with decent results. After researching the motor on the internet I discovered the minimum recommended prop size is 9x7 up to a 11x4.75. Nothing in the instructions with the motor.

I didn't have an e-prop so I tried a 9x6 masterscrew I had lying around. WOW, it's awesome, I've got speed, vertical climb, All I need now is some more aileron area to suit my taste in roll rate and I'll be set.

I'll pick up some APC e-props this week , I think I'll try 9x6 and 9x7.

KevinKRC

MalaysianFlyer

Kevin, very impressive. I think the APC props are going to give you a serious wow factor.

Are you planning to publish plans for this on the SPAD section?

KevinKRC

Thanks,

I have started to draw something up, I will post it when it is presentable.

I am making small sweeks(adjustments) and have improved the aileron roll rate to my taste.

Kevin

MalaysianFlyer

Cool, wish you every success with your tweaking [8D]

c-grain

Kevin, just exactly what flight characteristics of the flat wing foamies is it that you are not impressed with?I have been flying rc for over 40 years and for the past 5yrs. flat-plate wings on both conventional aircraft and elevon controlled deltas.I personally can't see any difference at all!Ofcource,there's a little mor drag at higher speeds,and the thickness should not exceed about 3/4"thick,but the smaller birds fly just fine at the slower speeds--under 70-80mph or so.The pusher jet below has over 700 ins.wing area,50.5" span,56" long and has a top end of over 100 mph.It has no bad habbits,Very good glide,and in general-a very smooth flight similar to a pattern plane
P.S. You guessed it--it has a "flat plate wing 5/8ths" thick!Also slows way down on a high alpha approach.