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Post  JPvelo Mon Mar 17, 2014 11:30 pm

I was going to wait until the 31st to post this but with the crazy weather around the country I want to open the time window as much as possible.

To be eligible for prizes you must private message me your official video by midnight mountain time April 18. Video will include takeoff and landing. You are allowed to "whip" the model as much as needed to get it safely in the air and up to speed. When you are satisfied the engine has unloaded and your going max speed you will raise your hand over your head. The signal to start timing will be when you drop your hand. Timing begins the first time the model passes between the camera and the pilot, timing  will be for ten laps (1/2 mile).


Here's the sample video:



When you private message the video to me send the URL code only, that will look like this:
https://youtu.be/c5HjoIOtmoU
This will make it easier for me to send the videos to the judges.

Please don't send video until after you have posted your qualifying photo on this thread:
https://www.coxengineforum.com/t6515-reed-speed-qualifying-photos-post-em-if-ya-got-em

I have three judges. I will average the two closest times for your official time. In the event of a tie all three times will be averaged. Judges decisions will be final. If you want your times I will send them to you but I won't divulge which judge gave which time. All videos will be posted on the forum when winners are announced.

Who are these judges, you ask?
First up is Larry Renger, AMA hall of fame member and chief designer of the Black Widow, Killer Bee, and Venom.
Next up is our own Paul Gibeault, champion mouse racer and multiple control line speed record holder.
Third is Ted Kraver, a long time scale and navy carrier competitor who most recently ran for president of NASA (National Association of Scale Aeromodelers).

What are the prizes?
First, second, and third will each receive a fifty dollar gift certificate to Cox International. Thank you Bernie!
I will also add up and average all official times. The racer who comes closest to the average time without going over wins a Black Lynx engine graciously donated by Matt of Ex Model Engines. Thank you Matt!

Please feel free to post questions and comments on this thread.

Gentlemen, start your engines!!!
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Post  Cribbs74 Mon Mar 17, 2014 11:40 pm

I read a 1974 article in flying models the other day that had a small feature of a Speed event hosted by very young Larry Renger.

I think we are in good hands. Thanks for taking this on Jim. I mean that most sincerely.

Ron
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Post  RknRusty Tue Mar 18, 2014 1:46 am

+1 on what Cribbs said, Jim. You are doing a great service to CEF to generate interest, attract new members and keep the forums fresh. We can't thank you enough.
Rusty

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Post  RknRusty Tue Mar 18, 2014 2:00 am

Just for fun I entered the number of seconds between the start and finish messages posted in the video.
Hope you don't mind, I can delete it. Sandbagger! lol! 
Rusty

CEF Reed Speed official video entries. Cl_spe10

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Post  ian1954 Tue Mar 18, 2014 6:51 am

I am afraid that this calculator is not very accurate.


The magic number to use is 180 for 42' lines.

180/44 * 10 = 40.909 mph



So 180/seconds * No of laps = mph for 42' lines


and 150/seconds * No of laps = mph for 35' lines



The calculator quoted loses accuracy through the unnecessary conversions from imperial to metric.


For example

1 metre =3.2808399 feet (3 feet 3⅜ inches). Therefore, 42' = 12.801599980541568029576816595043 metres = 504 inches. 12.8 meters = 503.93 inches


12.8016 metre line length gives a one lap distance of 12.8016 * 2 * 22/7 = 80.4672 metres


1 metre per second = 2.23693629 mph.


80.4672 * 10/44 = 18.288 metres per second


18.288 * 2.23693629 = 40.9090908 mph



In the calculator:-


The line length should have been 12.801599980541568029576816595043 metres not 12.8

Metres per second should have been 18.288 and not 18.27

If the calculator had been accurate it would have shown 40.909 mph

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Post  JPvelo Tue Mar 18, 2014 6:40 pm

Rusty,

You didn't think I would post my contest planes did you! I should've used my sons mouser with the tee dee just to scare everyone! lol! 

Ian,

I will be using elapsed time not mph to determine the winner. I do want to thank you for doing the math as I will be using your formula to post the speed of the top three.

Jim
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Post  RknRusty Tue Mar 18, 2014 8:05 pm

JPvelo wrote:Rusty,

You didn't think I would post my contest planes did you! I should've used my sons mouser with the tee dee just to scare everyone! lol! 
Jim
No I didn't lol. I had no doubt your Aces are still up your sleeve. I've seen your stuff when you weren't even trying.
Rusty

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Post  Cribbs74 Tue Mar 18, 2014 8:13 pm

Don't swell his head! You were supposed to say his engine runs are mediocre..... Wink  Gotta play the mental game. lol! 
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Post  RknRusty Tue Mar 18, 2014 10:30 pm

Cribbs74 wrote:Don't swell his head! You were supposed to say his engine runs are mediocre..... Wink  Gotta play the mental game. 
Oh, I was trying to make him overconfident, so he'd relax and not try hard.
 lol!

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Post  ian1954 Wed Mar 19, 2014 8:11 am

I was perusing the interweb and came across this measured speed for 1/2 A

½ A Speed 140.63 mph Carl Dodge Dayton, OH 9/11/05

On 42' lines that will be 1.2799 seconds per lap

On 35' lines  -  1.0666 seconds per lap

Mmmmm!
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Post  roddie Wed Mar 19, 2014 8:34 am

ian1954 wrote:I was perusing the interweb and came across this measured speed for 1/2 A

½ A   Speed   140.63 mph   Carl Dodge    Dayton, OH 9/11/05

On 42' lines that will be 1.2799 seconds per lap

On 35' lines  -  1.0666 seconds per lap

Mmmmm!

Ian, Our event is more similar to the NASS 1/2A Profile Proto class.
Below is their current record holder.

½A      Profile      108.78 mph      Jerry Rocha      Merced, CA      4/03/05

What does that calculate out to for lap-time?
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Post  ian1954 Wed Mar 19, 2014 8:42 am

On 42' lines that will be 180/108.78 = 1.65417158 seconds per lap

On 35' lines - 150/108.78 = 1.3789299 seconds per lap


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Post  roddie Wed Mar 19, 2014 9:19 am

one thousand one.. one thous...  Flying  Crazy Eyes
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Post  JPvelo Wed Mar 19, 2014 8:00 pm

I thought it might be helpful to show a video that clearly shows what we are NOT looking for:
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Post  Cribbs74 Wed Mar 19, 2014 10:34 pm

That looks pretty normal to me. What part are we not supposed to do?
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Post  JPvelo Sat Mar 29, 2014 3:35 pm

Bump
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Post  duke.johnson Thu Apr 03, 2014 11:47 am

Jim- the first post on this thread say we can whip the plane to get up to speed, I would guess the whipping stops for the timed period.
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Post  JPvelo Thu Apr 03, 2014 12:03 pm

duke.johnson wrote:Jim- the first post on this thread say we can whip the plane to get up to speed, I would guess the whipping stops for the timed period.
Yes, whipping stops when your hand goes up to signal the judges.
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Post  JPvelo Fri Apr 11, 2014 7:53 am

One week to get videos in!
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Post  JPvelo Fri May 09, 2014 7:34 am

All right guys,
One week to get videos in, midnite on the 16th.

Jim
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Post  JPvelo Fri May 09, 2014 7:42 am

All right guys,
One week to get videos in, midnite on the 16th.

Jim
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Post  JPvelo Fri May 09, 2014 7:49 pm

Another example of what not to send in:
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Post  RknRusty Fri May 09, 2014 7:55 pm

lol! lol! lol! lol! lol! lol! 
It bounced off the starter spring didn't it.

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Post  Cribbs74 Fri May 09, 2014 9:35 pm

That's a new one..... lol! 
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Post  batjac Sat May 10, 2014 12:28 am

And here I thought there were no canard entries for the contest....


The Mistaken Mark
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