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Home✈️Aircraft🚁HelicopterSpeed - Performance - Drag Race › IRCHA Speed Cup 2012
08-03-2012 12:36 AM  9 years ago
QueeQueg

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West Texas

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I'll find the app the jet guys were using. It's really cool. Accurate down to a tenth at 165MPH and it even works on HD video to check the speed. That's how they ran the contest. Every one could fly at their own field and video the flight with a thermometer showing the temp during flight and using the doppler effect speed can be measured precisely with your phone.

I know it's not good for the actual contest but it's something anyone can do that has a phone.

Could get more people involved for a big contest over the internet.
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08-03-2012 01:11 AM  9 years ago
QueeQueg

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West Texas

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The App is called RCSpeedo but unfortunately it only works with planes and jets. Uses the Prop noise to measure the Doppler effect and helis having two props won't work. Sorry!
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08-03-2012 03:38 AM  9 years ago
Santiago P

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Dayton

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Sorry but that will not work for what we do.

we measure time it takes to cover 2oo meters, from both directions, up and downwind, the average time is taken and that is the speed.

No radars
No thermometers
No phones
No satellites
No psichic network
No goverment intervention
No twitter
No facebook

Just RAW, DISTANCE OVER TIME SPEED

QQ
Bring on the Joker, they still fast.

S
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08-03-2012 03:42 AM  9 years ago
Santiago P

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Dayton

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Here's a very good suggestion from one of the inspection judges:

"Speed Cup contestants intending to enter the Stock Class (ICE or Electric) are encouraged to bring a copy of the original build/ instruction manual provided with the kit to challenge any stock vs. modified dispute."

This makes things easier in case of any doubt from either side.

Keep in mind we will also have representatives from Synergy, Gaui, Henseliet, Minicopter and possibly others in attendance.

Santiago
Event Director
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08-03-2012 12:32 PM  9 years ago
QueeQueg

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West Texas

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Sure wish I could get out there Santiago! But I will get this Joker flying again anyway and shoot for next year. Can't get parts for them any more but I've got enough spares between the two for at least 2 killer crashes and several minor. I've been torn about what to do with them. Be nice if the world's first bad ass electric 700mm helicopter could still make a name for itself 12 yrs later at IRHCA.

I'm guessing though that having a custom motor mount and flybarless head would put it in the unlimited class?

Q
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08-03-2012 07:39 PM  9 years ago
marcosp

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Buenos Aires, Argentina

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We were mentioning amateur ways of measuring speed. Not all of us have a speed trap at out fields!!! Pitty that app doesn't work for helis, sounds very easy to use.

Marcos
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08-03-2012 07:51 PM  9 years ago
Dood

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Wescanson

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Not all of us have a speed trap at out fields
The "speed trap" isn't much more than 2 guys with stop watches standing next to a pair of sticks in the ground.
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08-03-2012 07:56 PM  9 years ago
USNAviationjay

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Houston Tx USA

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why not enlist the help of some of Muncie's finest and a calibrated police radar gun..
solves any disputes real quick..

or laser
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08-03-2012 08:11 PM  9 years ago
QueeQueg

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West Texas

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Problem is you've got to stand out on the runway and catch the helis flying right at you with as little angle as possible. Especially with the laser they have to be aimed like a rifle at the target. So if you miss there might be some tempers flaring and rightfully so.

Also we had a guy with one of the cheapo guns that worked great on something the size of a car but it gave all kinds of different readings while trying to paint an RC plane.

Even GPS has it's quirks and the issue of civilian lowered resolution also.

They're doing it the least contraversial way and it's going to be real accurate with a distance of 200 yards.
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08-03-2012 09:04 PM  9 years ago
USNAviationjay

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Houston Tx USA

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gotcha. point taken. but peoples reaction times vary is my only observation do you have multiple timers on both the start and the finish?

sounds like a blast. done it at little funflys but not against the best from all over
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08-03-2012 11:09 PM  9 years ago
G200driver

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Arkansas

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OK..this is for all you speed freaks...someone tell me if this setup is good, fair, or poor..what do I need to change is anything. Does the gearing appear right since I'm at 100% pwm...no bogging with 14 degree pitch..

Scorpion 4530LE
Kosmik 200 ECS
TP 5000 65C's(worn)
Radix 710 V2's

My best speed so far..that's a secret!
www.gearlegs.com
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08-04-2012 02:17 AM  9 years ago
Santiago P

rrProfessor

Dayton

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G200driver

looks good.

Jay
Radar guns are good tools to check progress but no good for measuring sustained speed, only instantaneous speed which is tottaly worthles for contest purposes. Manny high speed claims found over the internet are diving downwind into radar guns.

True sustained speed can only be measure by measuring distance over time. the longer the distance, the truer the speed. This is how the FAI records are set, and even the way is done at the Bonneville flats.

I really wish we had an automatic system with transponder in heli and ground sensors to trigger the clocks today, but I have to wait for next year to have those, be patient. All this takes work for volunters and MONEY. I ran out of time and energy this year.

The dual chronometers with hand trigers worked well last year. Will have to do one more time.

The automatic system is comming guys

Santiago
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08-04-2012 07:39 AM  9 years ago
R.J.

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SF bay area, CA USA

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Are my calculations correct that the difference between 1st and 2nd last year was two hundredths (0.02)of a second? 127.2mph=3.52sec and 128mph=3.50sec over 200m distance.
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08-04-2012 01:02 PM  9 years ago
Santiago P

rrProfessor

Dayton

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Yes that is correct.

RJ,
I already explained to you in PMs with a lot of detail that we are using the best system available to us right now. You are familiar with Ken's double Seiko Chronometers.

If you have a dual ground sensor triggered by inflight transponder that I can set 200 meters apart and digitaly connect to these chronometers I would rip it out of your hands.

The Pylon Racing community is depeloping a timming/tracking system for the 3 pylon events that is similar to what soccer in Europe uses to track every player's step. Will be tottaly automated and will give us time from point to point we chose.
This is the system I am hoping to use. I assume there is a small TX the airplane or heli must carry, but they are very small and non intrusive.

I will be dedicating most of my time this year cycle to get these systems. THIS IS NOT AN IRCHA or AMA EFFORT, this is just me and hope a few friends help. I would not count the IRCHA guys out of the loop, they have been golden so far in backing and supporting this event.

Santiago
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08-04-2012 01:27 PM  9 years ago
Bouchah

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Willow Spring, N. Carolina USA

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I have casually raced 1/8 scale buggies at a track in Michigan, they had a system setup using a wire buried in the track at the start finish line. Each car had a transponder in it that counted laps and lap times. On practice days I could be there by myself trying to improve lap times, with the program setup properly my lap times were announced over a speaker system so I didnt even have to look at a display to see how I was doing. At the end of my session I could look at the monitor if I wanted to, it kept a log of fastest laps and such. I thought it was pretty cool. The transponders did cost about $100 though and it did plug into your RX for power.Blade 130x (5)
Trex 550 V2 (18)
Shuttle ZXX
Freya Xspec (20)
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08-04-2012 04:19 PM  9 years ago
Santiago P

rrProfessor - Dayton MyPosts All  Forum  Topic

I received the prizes from Scorpion Power Systems

1 HK-4540 motor kit
1 HK-4535-550kv LE Motor
2 Certificates for the about to be released 14S 160A ESC

much thanks to Georges and the guys at Scorpion

Santiago
Event Director
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08-05-2012 09:12 AM  9 years ago
R.J.

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SF bay area, CA USA

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MoneyPitVictim,

I apologize if I sounded critical. I did not mean to offend. I was just thinking how difficult a task it is to run an event like this with times so close. I don't have any better ideas on how to do it. The Seiko Chronometers are expensive enough as it is. Transponders you said were even more expensive, and would still need to be figured out to make them work after you spent many thousands on the equipment.

Anyway, I think it's really cool that you have spent all this effort to promote the speed event. I think you can already see that it's becoming wildly popular. Thanks for all of your efforts.

Regards,
Rick
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08-06-2012 01:29 AM  9 years ago
marcosp

rrApprentice

Buenos Aires, Argentina

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Wahooooo! Nice!
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08-06-2012 10:26 PM  9 years ago
Santiago P

rrProfessor

Dayton

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only 11 days away

S
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08-06-2012 11:06 PM  9 years ago
marcosp

rrApprentice

Buenos Aires, Argentina

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My heli is "almost" ready. Just a tiny cliciticlac noise at full speed that might make it blow apart. Small detail.
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