Icarus Jr Has FLOWN!!!!!!

[Robert Zambelli]

Finally finished!!!!!
28.5 ounces, ready to go.

Bob Z.

[Paul Taylor]

Looks nifty Bob!

But what is the block on the head???

[john e. holliday]

Looks great, hope it flies as well as it looks.

[Dennis Adamisin]

Inquiring minds want to know - fly report???   

Also curious about that  "biscuit pan" under the head?

[FLOYD CARTER]

Yeah.   If you think you need a "heat sink", you can forget it.  The cylinder sticking out in the breeze is plenty for cooling.  Also, it isn't necessary to provide cooling for the crankcase..there is very little heat generated down there, and what there is will be radiated away.  Yes, I know..heat flows hot/cold, so some of the cylinder heat can get down to the crankcase, but with all the forced air..hardly worth worrying about.

Floyd

[Robert Zambelli]

Well, I finally flew it today and I was really impressed. On the first flight, I did most of the OTS pattern and the engine run was perfect. I did not push it as I launched with half a tank of fuel.
It is very smooth, corners well and flys at a reasonable speed.
It's very responsive, maybe just a bit too much - probably curable with a tad of noseweight.
Regarding the heatsink, the ETA engines tend to run quite hot while breaking in. It ran around 20 degrees cooler with the aluminum plate. I will remove it soon.
I'll bring it to Brodaks.

   Bob Z.

[Bryan Higgins]

Very Cool Robert

[proparc]

Bob, the "canalizer" goes over the wing, not on the engine.  

[Robert Zambelli]

canalizer?

Bob Z.

[ChrisSarnowski]

Nice looking ship, Bob!

A canalizer is some sort of RC pattern ship aerodynamic thingy.

-Chris

[John Duncan]

Great looking plan Bob what engine is in it.
John D

[Scott Richlen]

Bob:

Good looking airplane.  Can you give us some background on the design and designer?  Where'd you find the plans?

Scott

[Robert Zambelli]

It was designed by John Coasby in the early 50s. OTS legal. 48 inch span. The original had a drop-off gear, detachable wing (held on with rubber bands) and external leadouts. I attached the wing permanently and fitted a fixed gear.
It has a dihedral wing and weighs just under 29 ounces, ready to fly.

I like to power my OTS planes with the same engine as used on the original. It was powered by an English ETA 29, a rear rotor ringed speed engine from the early 50s. Luckily, I found a brand new one at a swap meet a few years back.
With a Top Flite 10-6 wooden prop, the ETA pulls the plane beautifully and did not miss a beat. The only modification I made was fitting an ENYA needle valve assembly.

I gave the plans to Bill Little.

Bob Z.
 

[Claudio Chacon]

canalizer?

Bob Z.

Canalizers:

[Scott Richlen]

Hey Bill:

Warm up your printing press!  I need a set.

Scott