The Jekyll or Hyde

Seeing as the weather won't allow me to go flying or fishing, I thought I would start on my winter build. Having decided not to fly "the beast" I thought I would cannibalise it for parts. It would cost me three times as much as I paid for it to buy new & they are quality parts.
Having worked out the basic dimensions (1600 mm wing span- 1300 mm fuz) & a rough design I got cutting. The original idea was for something fairly sleek with a low wing, but now I'm leaning towards completely the opposite, high wing tail dragger with loads of lift on Tundra wheels & tyres. At this stage it would be easy enough to change & go either way. I will sleep on it & make my mind up tomorrow if it's going to be a "Jekyll" or "Hyde".

After due consideration I have decided to change the design & go for a bush plane. So Jekyll it is. Several reasons. 1. It looks like we may be flying from some rough strips in the future ! 2. I haven't finished testing the Cherokee yet, one low wing trainer is enough at the moment. 3. It will be an interesting build (especially the landing gear) 4. I just love the look of them.
Started the modification today, pictures will follow when there is something to look at.
PS. Have you seen the price of 5" balloon wheels!

Eric wrote: Have a look at the HobbyKing Tundra spare wheels -
hobbyking.com/en_us/rubber-foam-version-...lver-hub.html[/quote

The problem with hobbyking here is the cost of postage, which is ridiculous! I managed to source a pair here at half the price.
Appreciate the thought though.

The photos wont load, so I will try again!

I managed to find time to get a bit done on the "Jekyll" today. I decided to split it into two sections, purely because it's easier to work on that way. The plan is to get as much finished on the front as possible then move on to the rear section & empanage. This is also an advantage as I can run the push rod sleeves & the wiring for the elevator servos before joining the two halves. The wings will be last, I think I may have sourced some denser foam for them.

Okay lads I may need a bit of help here. The concept of this model has now become STOL. So with that in mind I am trying to figure out some of the parameters for the design. This is what Iv'e got to work with so for.
Wingspan 1650 mm. chord 275 mm. Clark Y profile. ( could be under-cambered if necessary)
Fuz, length 1250 - 1300 mm ( undetermined as yet) width, 150 mm. height ( highest point, top of wing) 210 mm.
Motor 850kv, producing 2500 watts on 6s with 17 X 8 prop. ( I would ideally like to run 4s )
Empanage ?
All up weight 4 to 4.5 kilos, anticipated.
With all that in mind, I need to generate as much lift at slow speed as possible. would I be right in making the flaps & ailerons nearly the whole span of the wing, if so what percentage of flap to aileron ?
If I have interpreted what I have read so far correctly, all the control surfaces need to be fairly large to maintain authority at slow speeds ?
Will the motor/ prop combination handle the induced drag?
Any ideas on generating as much lift as possible appreciated.
PS. I know it's heavy but i'm not very good at saving on weight!

Thanks Eric. At the moment I am still working on the front half so I can still shave quite a lot of weight. Could you give me an idea of the max all up to aim for ?

crash
I would tend to agree with Eric.
You will have something like 5 sq ft of wing supporting some 9 lbs or 144 oz giving a wing loading of 144/5 = 28 oz/sqft. That's a 'warbird' wing loading!
How STOL it might be would depend on what you were comparing it too but if you are thinking a take off and landing run measured in a low number (5?) air craft lengths then the wing loading will have to come down a lot.
Say 1/3 the weight or 3 times the wing area or any combination!

Power is not the problem. With 2500W available you have plenty, even for a 9lb plane, although whether you could control the motor torque at 'near the stall' speeds with a 1.65 m wing is another matter!

If you want to stay with a 1.65m wing then it looks like '1/3 the weight' needs to be the target. That could mean a smaller lighter (1000W?) motor.

So simply put, we are looking at a bigger wing, half flaps half ailerons & saving as much weight as possible. The motor will have to stay as it's the only one of a decent size I have. Thanks for the help, much appreciated.
PS. The new extruded foam turned up yesterday, what a difference !

Yeah I get the point. No flying tanks ! I think I can get the weight down to 3.5 Kg & increase the wing to 1800 mm X 300 mm.
A kilo of "loose" feathers would fall slower, unless it was in a vacuum !