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Cox Engine of The Month
September-2018
Davenz13's

"Cox Special MKII .15"



PAST WINNERS
Speed Contest 2018
CEF Traveling Engine

Win This Engine!
The Traveling Prop
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World of Aviation

The First Tach Race

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The First Tach Race

Post  dckrsn on Sun Sep 14, 2014 8:30 pm

I remember following the "First Annual 049 Collector’s Proxy Tach Race" on
Mark Boesen's site, but I just stumbled on Reggie Johnson's write-up/recap today.
Yikes, 5 1/2 years ago.  Shocked
http://www.ebay.com/gds/First-Annual-049-Collector-s-Proxy-Tach-Race-/10000000011066396/g.html
Bob
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Re: The First Tach Race

Post  Cribbs74 on Sun Sep 14, 2014 10:37 pm

Interesting numbers.

Also interesting is the prop choice, that's the prop I used for my reed speed run. I would like to use something other than the Cox 5x3 next go around.

Thanks for posting that Bob.
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Re: The First Tach Race

Post  Mark Boesen on Sun Nov 02, 2014 7:46 pm

I think if the majority wanted to, we could return to APC props and 35% nitro, the increase in RPM should not be that great.

In 2009 we used 4.75x4 APC and 35% for unlimited/open, with top RPM at 20k, last year the my unlimited/open turned about the same with a 5x3 and 25%...
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Re: The First Tach Race

Post  Cribbs74 on Sun Nov 02, 2014 7:57 pm

Mark,

It's true, I don't think it would be a huge increase, but if your engine turned over 20K with a 5x3 and 25% then 21K plus would have been possible with the APC and 35%

Sending you a PM
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Re: The First Tach Race

Post  Mark Boesen on Sun Nov 02, 2014 8:07 pm

2009 RESULTS:
Mouse 1
1st place Paul Gibeault Golden Bee Racer 20,400 RPM
2nd place Mark Boesen Blue Bee Sidewinder 18,900 RPM
3rd place Graham Collins Cox Car Custom 17,300 RPM

Unlimited Class
1st place Paul Gibeault Cox Venom 20,200 RPM
2nd place Mark Boesen Cox Red Rocket Custom 19,800 RPM
3rd place Reggie Johnson Cox purple custom 19,400 RPM
4th place Nick Van Matre Cox cast case custom 18,800 RPM
5th place Bernie and Xena Look Cox red anodize custom 18,300 RPM
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Re: The First Tach Race

Post  RknRusty on Sun Nov 02, 2014 8:22 pm

dckrsn wrote:I remember following the "First Annual 049 Collector’s Proxy Tach Race" on
Mark Boesen's site, but I just stumbled on Reggie Johnson's write-up/recap today.
Yikes, 5 1/2 years ago.  Shocked
http://www.ebay.com/gds/First-Annual-049-Collector-s-Proxy-Tach-Race-/10000000011066396/g.html
Bob
That was an excellent enthusiastic writeup. Thanks Bob for posting it. That helped spark my interest in getting an engine ready for this January. I think I have a contestant already. A pre-'96 BW, not sure what class, but I made a movie about it a couple of years ago when I built it following Paul's article. It hasn't been run since then.
Rusty

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Re: The First Tach Race

Post  getback on Mon Nov 03, 2014 7:24 am

Nice write up , Thanks for sharing Bob .Those are some impressive engines and numbers . Eric Pumpkin
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Re: The First Tach Race

Post  stuntflyr on Tue Jan 20, 2015 11:12 am

I thought I wrote that!? Isn't that the contest article I wrote after I hosted the first Tach Race?
Reggie did a nice job editing the pics into the story, thanks man.
Chris...
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Re: The First Tach Race

Post  stuntflyr on Tue Jan 20, 2015 11:24 am

Mark Boesen wrote:I think if the majority wanted to, we could return to APC props and 35% nitro, the increase in RPM should not be that great.

In 2009 we used 4.75x4 APC and 35% for unlimited/open, with top RPM at 20k, last year the my unlimited/open turned about the same with a 5x3 and 25%...

I think static runs would be as you say, Mark. The APC unloads greatly in the air and that's where the great benefit of that prop lies. Static it's similar, though an increase of 1K is quite a lot.
Chris...
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Re: The First Tach Race

Post  Mark Boesen on Tue Jan 20, 2015 10:07 pm

stuntflyr wrote:I thought I wrote that!? Isn't that the contest article I wrote after I hosted the first Tach Race?
Reggie did a nice job editing the pics into the story, thanks man.
Chris...

lol, yep, i'm pretty sure it was an oversight, your name is at the bottom, but if you read thru it quickly i see where it could be missed.

Anyway a big thanks again for getting the ball rolling on this!
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Re: The First Tach Race

Post  crankbndr on Thu Jan 22, 2015 9:33 am

I missed the first race but been in the last four. I think Kims run them all. There is a pause for  years 10 and 11? I picked up my game last year but so did everyone else.
Doug


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