Supports for the hinges on the struts

Sir how do pipers handle in the wind?

Nothing much to do with Pipers. More on weight, size etc. of model

However, the few I have seen flying (models, not full size) did seem to have a tip-stall tendency

So which do you prefer for beginner- oshkosh trainer or piper. Both as 4ch.

www.rcgroups.com/forums/showthread.php?t=1040899
oshkosh

Neither

I see you have apprehensions about strength of the wing with that 12mm balsa spar. The best way (in terms of weight addition etc) to overcome the situation is to use functional wing struts. Those would not only look scale but also serve to provide you the required strength. Make the struts out of suitable dia wire and clad them with balsa. You can solder on metal plates at the end with suitable hole through which you can screw/bolt the struts to fuse and wing hard points  

I am making them

Part of the plans, and were in fact the first materials I checked before starting. I will be using 8 mm Aluminium Tubing

But, I still have apprehensions  .

And Captain, thanks so much for the support 

Actually post # 50 mentions it

And, in continuation:



Hinges for the wing Struts:

Hinges fitted into the balsa block already glued in. The wire strut support will fit into the ply piece already glued in the wing inner

Closing up the wing

Wing completed

Used 19 gm MG HK servos

Checking wing incidence and likely CoG position

Sir,
I fear that this thread may convert me into a Coro builder!
Please share expected wing loading and proposed power.
Did you consider spar made of 'baten'? (As in Windows), instead of balsa?
Regards

Iyer sir, never fear. Convert 

Here are the specs from post # 1

As per the designer, weight is 1700 gms + RC equipment, ie 4 standard servos + Rx Battery, Rx, wires etc. Say 300 gm approx giving a total weight of 2 Kg

Wing Area is 46.4 dm²

So a wing loading of about 43 g/dm²

In the write up, the designer recommends a 19 to 25. I'm not so interested in speed. So I'm using a Turnigy G 15 - 950 KV with a 12*6

RC Tools shows:

12*6
30 deg. C
9000 rpm
Static Thrust 2.01 Kg
453 Watts
Flying Speed 51 mph (about 80 KmPH)

Which should be OK.

The motor specs:

Spec.
Battery: 3~4 Cell /11.1~14.8V
RPM: 950kv
Max current: 34A
No load current: 10V/2.0A
Current capacity: 42A/15sec
Internal resistance: 0.03 ohm
Weight: 152g  (not including connectors)
Diameter of shaft: 5mm
Dimensions: 73x35mm

Required;
45A ESC
3S~4S Li-Po / 8 ~ 12-cell Ni-MH/Ni-Cd
10x6 ~ 13x6.5 prop



Although it says max current 34 A, a 13 X 6.5 Prop will draw over 50 A at full throttle. So I'm going with this

In normal cruising, with a weight of 4.4 lbs, I do not think the wattage will exceed 250-280 W

I am most interested in hearing your views!

  THIS IS beautiful sir!

Wait for me, will do its maiden 

Thanks Arvind. Waiting..............

It will be good get-together again.

We all wish so Saurabh. But Bangalore to Gurgaon is indeed further than Noida to Gurgaon 

When will this bird fly?
Regards
P.s - excellent build sir!

It will take another week to 10 days to get ready I figure

Been reading more about the dreaded tip-stall

Seems quite common with Piper Cubs!

The flat bottomed wing means on power there is a tendency to climb (ballon). On aileron turns, at lower speed, the inner wing half will turn slower than the outer. So the outer will tend to rise... progressively....and lead to a spin  >

Seen it happen to some of the better fliers on our field too, and yes, on the Piper Cub  > >

Well, I'm not that good a flier, so this is what I'm planning:

1. Turns will be rudder-aileron co-ordinated - start with rudder eg left rudder for a left turn, add a little left aileron to complete the turn, release rudder, right aileron to level wings
2. Will put about 3-4 mm aileron reflex. Barn door ailerons only about 1/3 of the span, hope it will act as washout
3. For landing, will have to "fly it in"under power
4. Will use 2:1 differential aileron

Would appreciate suggestions from the seniors on this