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Cox Engine of The Month
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F4D Phantom II's

"Cox .049 Marine inboard engine."

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Post  944_Jim Sat Jan 15, 2022 4:47 pm

PINCH PINCH

I'm still pinching myself...and it still hurts. Therefore, I must be awake and not dreaming:
https://www.vintagemodelcompany.com/22-kk-radian.html

This arrived on my doorstep. It IS the same plane the manufacturer used for their catalog (link above).

Several weeks ago I got an unusual request via PM on RCG.
I "met" the owner/builder, Mr. Matthew on RCG during his English replica kit build log a few years ago. I actually bought a CNC cut short kit (inspired by Mr. Matthew's build log in the RCG thread) from Mark Winstanley in Canada, while purchasing my Frog Mosquito clone kit.

The PM was really short and to the point...would I like to fly his model? Ummm, yes Sir! But aren't you in ENGLAND? A few more emails to iron out the details...and he shipped it a week ago. It got here a lot faster than I expected.

My instructions are simple...video record each flight as I dial in to best performance until re-kitted. Simple enough!

This is my first with flaps. Frankly, the build is just jaw-dropping. The plane is super light. It makes me think I build too heavy! While it has the same wingspan as my old Scientific P-40, this has to be carrying more square inches just because the wings are not as triangular as the P40 wings. The tank rides in a slide-in cartridge that allows for removal and servicing. The landing gear is spectacular, featuring hand-built wheels and also removable. The engine is lightly oiled, with no congealed castor stickiness. A quick check in the exhaust port shows SPI...and is that a groove at the base if the piston skirt? Blink Blink...Yup! .051! Mr. Matthew indicates this is a Tee Dee de-tuned with Medallion front-end parts.

CG is around 1" back from leading edge, leadouts come out just behind the CG, and the plane hangs just a bit nose down from the lead-outs.
In short, this will require very little fiddling...maybe just flush the tank with methanol, and go fly.

PINCH PINCH! Owe! Definitely not dreaming...

Thanks Mr. Matthew. I hope to do justice to your efforts.

It is still Christmas somewhere! Img_2079
It is still Christmas somewhere! Img_2080


Last edited by 944_Jim on Sun Jan 16, 2022 7:30 am; edited 1 time in total

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Post  rsv1cox Sat Jan 15, 2022 6:22 pm

Nice plane Jim, delicious enough for me to build.  Then I snapped back to reality.  

Let me get this straight......they shipped the plane intact from England to Mississippi without it being damaged..............

and.........what does this mean?

"My instructions are simple...video record each flight as I dial in to best performance until re-kitted. Simple enough!"

Oh yes......and how are the flaps connected?
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Post  944_Jim Sat Jan 15, 2022 7:36 pm

Bob,

You are just as shocked and pleasantly surprised as I am! The box looked great too! It took right at two weeks to get here. I bet it cost a small fortune.

Those were his words...I take it to mean he wants exhilirating video with respectful yet ambitiious flying and tuning...and more flying, but not to be afraid to exceed limits. I will start carefully. I will video everything. I won't fly it as care-free (read that carelessly) as the P40.

Look below the rear corner of the canopy. There is an access port on both sides of the fuselage. It is just above the flap hinge, with the bellcrank pushrod pushing a control horn on the flap shaft, and from there out to the elevator control horn.
The build details are amazing! Check out the elevator pushrod fairing!It is still Christmas somewhere! Img_2081
It is still Christmas somewhere! Img_2083

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Post  getback Sun Jan 16, 2022 6:57 am

NICE !! I am with Ya'll from England and got there intact !! nice looking plane and detail is great . That plane is going to Scream ! What line length you thinking Jim ? I would say 42' or more .. Well all I can say is Merry delated Christmas !! Snowman Snowing here feels like it LOL
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Post  getback Sun Jan 16, 2022 7:39 am

He has got alot of nice models to build FF, RC , CL all kinds of categories Very Happy
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Post  944_Jim Sun Jan 16, 2022 9:15 am

Eric,
I had to review the email traffic. Mr. Matthew indicated first test flights were on 30' lines by an experienced combat pilot. They both felt the line choice was a bit short. The pilot felt the CG was spot-on, yet respected the model too much to put it through it's paces.

I plan on starting at 35' and working up until it feels too light in Roundie-Roundie, and then coming back in a foot or two until fair line pull is exhibited. If it exhibits good line pull in wing-overs, then I'll move to flying over grass, and attempt inverted flying. Then from there, loops.
I suspect it will be around 38', which I still have in .008" 7-strand from the Scientific P-40...provided they handle a line-pull test with zero broken strands. I'll be quite pleased if it handles 42'. This plane deserves top-shelf lines...not just "whatever is in the spool."

Everything will be recorded...that was the main thrust of the deal.

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Post  NEW222 Sun Jan 16, 2022 9:36 am

That sure is a looker you received there. Very nicely built and finished. Definately glad it made it over the pond in one piece.
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Post  getback Sun Jan 16, 2022 9:48 am

Look what I found looking for a video of this bird fling >> https://www.coxengineforum.com/t13198-kk-radian
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