Browsing through Outerzone.co.uk I came across the Honker Bipe (http://outerzone.co.uk/plan_details.asp?ID=5801)

Having never built a Jedelsky wing before, I was intrigued, and decided to give it a bash 

I ordered some balsa from RCB, which was delivered with their usual rapidity - 3 days from order to receipt! RCB rocks 

The build is relatively straightforward

I did do some modifications as I will be using a Brushless Motor, not an engine



The MAS plane is a big help for removing large amounts of balsa. The SKIL orbital sander helps too



Used here to make triangular stock

Anticipated weight about 1.1-1.2 Kg all up (with 2200 3S Lipo)

Thought about a 2836-1200, but wanted a little more torque, so selected the DM 2610 - 1200 KV from Kinetic Hobbies



This motor comes beautifully packed, with most accessories. Decided to mount it from the inside.

The interesting, and in my opinion very good thing, difference I found in this motor is it has a 3 point shaft retaining/mounting arrangement. Instead of a circlip common with most Chinese motors, this has 2 retaining rings. Having had a couple of nasty incidents with circlip failures, I'm pretty happy with this. Also, that fat 5 mm shaft inspires confidence   . 89 grams is an acceptable weight with connectors.

I used a 30 A ESC from Kinetic Hobbies too

Cut a hatch out from the fuse top. Put a ply tongue and a hatch lock

Bottom wing. Have to cut out the ailerons still.



Oops - a servo connector needed changing 



Cutting out cabanes. Used 3 mm lite-ply - had doubts  So I then doubled with 3 mm balsa too

I used Monokote (generic term for heat-shrinking self-adhesive film) hinges throughout. Been a very very long time since I did that, and the first time I'll be using Monokote hinges on Ailerons

How I would like one of my engines on this model  .

Any chance if it will come up for gift once done I am first on the line.     

Sandy saheb,

If I don't bust it on the maiden;

and if I decide to give it away;

and if it is in flyable condition at that time;

you would be welcome 

nice build!! good to know tat ur working on sanding too!! the advantage is that the time taken to build a Jedelsky wing is less but on the other hand considerably more amount of wood is used than normal airfoils!! Jedelsky wings are mostly for slow flying, lets see how yours goes!! had used them on my Jetex 250 build , turned up nice but didnt have too many flights!!

Black monokote is horribly difficult to peel the backing film from. Stupid me - I had Black coloured tape  



Tail feathers also use monokote hingeing



Bottom wing ready

Subhash, as I mentioned this is the first model I am building with a Jedelsky style wing, so I have no idea.

If, as you say, it is slow, that would mean a lot of lift, which is great. But the designer has called it a Sport Model (this was in commercial production as a kit too)

@sanjay sir - the Jedelsky airfoil is mostly used on gliders!! when someone talks about Jedelsky wing , the thought that comes to my mind are low speed , considerable amount of more lift and low Reynolds number!! actually these don't suit Jedelsky type of wings but Jedelsky wings suit these conditions!! so that means u could use it on a sports model too!!

Sir,
You are using a design from a master. (Bird of Time?)
Being built by a master builder.
Then why the doubts?

When was the last time that you built a model that did not fly?
Can't think of even one in the last 2 years!

dil mange more 

Hi sanjay,

what grade balsa did you buy from RCB? i recently got B-cut.

Sahil

Grade and cut.
Two different parameters.
No?

QuoteGrade and cut.
Two different parameters.
No?

i'm also interested in knowing (sticker on my balsa says Premium Balsa Wood - Model Grain B-cut)

Sahil

Thank you for that confidence booster Iyer sir 

Bunty, more coming

Sahil, A grade balsa is straight grain cut. The grain runs straight with the sheeting or piece. Its the nicest grade of balsa. The difference in grades is determined by the grain in relationship to the cut piece, some may have the grain at a 45 degree angle to the sheet or more or less, this is usually B or C grade. 4-6lb is the weight of a cubic 1 foot sq. 4-6 pound stock is the lightest grade and the hardest to get which lends the higher cost. 8-10lb stock is less expensive

That said, B Grade works OK too, except in thin sheets

Landing gear. I used a larger diameter tail wheel for 2 reasons - a) I did not want too steep an AoA so I could get time to build up speed, without the model jumping into the air; and b) Rough ground  



Nylon Bolts to save weight. If they break, it probably would save my u/c mount, a block of 12 mm balsa  

Since the wings are fastened with rubber bands, there are strong chances they will not be in the same location after diddembly and re-assembly. So used locator pins



Fuse complete

Hope she flies 

Beautiful...  Thats a wow...  Hats off

PS: Sanjay sir creating doubt to ward off buri nazar