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Cox Engine of The Month
February-2021
Levent Suberk's

"Cox TD .010 with Graupner Silentius free flight model."


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Post  Alfredo Rubio Tue Feb 16, 2021 11:45 pm

As I told you, I cameback to CL after many years... Well I discovered that I love the speed Smile So I designed my first speed model, now in 3 sizes, .049, .020 and .010 TD I named it AV-1, AV-.5 and AV- 1/4 ... Av i in Memoriam of my son Avraham.

Cheers.

Al

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Post  944_Jim Wed Feb 17, 2021 1:00 pm

Hi Mr. Al,

I'm not particularly satisfied by forward-swept wings, but I have to ask...

Given that most 1/2A planes are particularly nose-heavy, I suspect the forward sweep can considerably shift the "center of lift" (is that a design factor?) forward and closer to the CG.
How do these planes handle? I bet they can loop a lot better than most slabbies!
I also suspect this to be correct, or there wouldn't be more than one.

Please tell us how well they fly, and if you do more than Roundie-Roundie with an occasional up/down.

I will say I'm now quite curious about how the planes handle, and am on the verge of changing my attitudes/opinions (admittedly mostly asthetic) concerning this design.

Thanks for sharing...and good for you to find a positive way to cherish your son's life.
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Post  Alfredo Rubio Wed Feb 17, 2021 5:58 pm

944_Jim wrote:Hi Mr. Al,

I'm not particularly satisfied by forward-swept wings, but I have to ask...

Given that most 1/2A planes are particularly nose-heavy, I suspect the forward sweep can considerably shift the "center of lift" (is that a design factor?) forward and closer to the CG.
How do these planes handle? I bet they can loop a lot better than most slabbies!
I also suspect this to be correct, or there wouldn't be more than one.

Please tell us how well they fly, and if you do more than Roundie-Roundie with an occasional up/down.

I will say I'm now quite curious about how the planes handle, and am on the verge of changing my attitudes/opinions (admittedly mostly asthetic) concerning this design.

Thanks for sharing...and good for you to find a positive way to cherish your son's life.

Thanks for the words, well this models are only for speed not for aerobatic. The models flies fine, and fast!!! The wings with this design are fine to CG position, that eas the first reason, but for aerodinamics too. The bigger one flies at 130 km/hr or more and 2.14 secs per lap. Maybe that was the reason for the name too, my son loved the speed on motorcicles, he pased away 2 years ago.
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