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Old 10-21-2013, 10:54 AM   #1 (permalink)
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Default New world record: 25.73 km goal and return with Logo 600SE

I've been waiting for this email for 5 months:

FAI has ratified the following Class F (Model Aircraft) World record :
================================================
Claim number : 16802
Sub-class :F5 Open (Radio Control Flight)
Category: Helicopter
Group : Electrical Motor
Type of record : Distance to goal and return: 202
Performance : 25.73 km Pilot : John McNeil (USA) Date :10.05.2013 Previous record : no record set yet ================================================
FAI congratulates the Pilot on this splendid achievement.

http://www.fai.org/fai-record-file/?recordId=16802

I did this with my trusty Logo 600SE without too many mods. I had a lot of help from my YHSC and Chollas buddies, who I thank profusely.

John

PS, for any of you who noticed my cryptic request for a 3-view back in May, this is why –*it's required for the FAI paper work
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Old 10-21-2013, 12:06 PM   #2 (permalink)
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Very cool, have any more info? How did you stay in contact with the heli? What was your setup? Pics of the machine/flying sight? Congrats!
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Old 10-21-2013, 12:51 PM   #3 (permalink)
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I sat in the back set of a convertible Mustang and we drove along side. I will post pics and more details tonight - John
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Old 10-21-2013, 12:53 PM   #4 (permalink)
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Here is a pic of me and my machine after the flight to wet your appetite
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Old 10-21-2013, 11:00 PM   #5 (permalink)
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Here is some more info on my setup:

Logo 600 SE
Airtronics SD-10G
Full size Vbar
Scorpion motor 4035-590
Castle ESC with VBar governor
Edge 693mm flybarless main blades
Edge 105mm tail blades
4 x 5 cell 5000mAh Thunder power batteries. 10S2P config
Total weight 5.44kg

The head speed was about 1150 RPM. With all the extra weight, the Logo flies very nicely in a straight line, but is on the ragged edge in every other way. If you let the descent rate get too high, you can't recover. If you try to make a tight turn, or get hit by a big wind guest, you can't recover. I found this out the hard way. With this much extra weight, the crash was pretty bad. It is strange flying in this configuration, compared with the normal battery load and head speed, where the 600SE is absolutely rock-solid, no matter the wind or gusts.

On one flight I ran out of battery while flying 30 MPH about 30 feet up. I am pretty good at autos, but barely saved it. Part of the problem is that I was in a moving car. The ESC shut down fast and our car was 50ft past the heli by the time I landed it. I use nylon bolts on the skids, and sheared them off on the first bounce. The good thing is that the extra batteries act as out-riggers and kept it upright when I set-down after the bounce

Anyway, the record flight was smooth as can be. On interesting thing is that you can absolutely feel thermals. I could feel the wind shifts, the lift and the sink *all of which strongly affected the required collective and pitch settings.

John
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Old 10-22-2013, 01:20 AM   #6 (permalink)
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Wow, I'm surprised it's such a stock Logo!!! I was expecting a highly modified frame and drivetrain.

I can only imagine what could be achieved with high efficiency esc and motor combined with asymmetric blades and a streamlined body kit.

I can imagine that even just a set of asymmetric Spin blades would improve the flying characteristics and efficiency a whole lot.

Please provide more details, it's nice to see something different on the forums for a change.
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Old 10-22-2013, 10:26 AM   #7 (permalink)
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Thanks for the props.

Yes, the asymmetric, wide-cord 710mm blades from Spin Blades work better. A lower KV motor and better ESC would help too, but that's lots of money. The new blades were "free" compliments of a crash.

There is no reason to modify the frames, the plastic Logo frames are as light as anything I could build. I'd love to try a Uvular fuselage though.

I'm not sure what to add detail-wise, please ask more questions - John
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Old 10-22-2013, 02:30 PM   #8 (permalink)
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Very Very Very Cool John!

I tried to do the math. So did you flew for like 30 minutes?
And you flew to a set point and then flew back?
A total of like 16 miles correct?

Mike
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Old 10-22-2013, 10:24 PM   #9 (permalink)
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Thanks Mike. The flight was ~38 minutes. I flew 8 miles to a preset turn point by a hill, hovered while we turned the car around, then flew 8 miles back. This was an afternoon flight so three was a fair amount of variable wind, but ground speed was ~25MPH. - John
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Old 10-23-2013, 01:09 AM   #10 (permalink)
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I do agree that it is a lot of money to spend on extra parts for a "one time thing", but it would be interesting just to see what can be done with the right combination of handpicked off-the-shelf parts.

I like the battery configuration, have you considered doing away with the skids altogether and just landing on the batteries? You could add a thin layer of carbon or plywood to help save the batteries in a less than perfect landing. The savings in drag might be worth the effort .

Also, using a cheap plastic Logo 500 canopy might save you quite a bit of weight. You can find them here (they do seem a little more pricey than I remember though).

Lastly did you run any telemetry on the heli? I would think you would want to keep a close eye on your battery levels and signal strength etc.
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Old 10-24-2013, 05:17 PM   #11 (permalink)
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Very cool ! congrats , a little off topic , my dad set the worlds record for distance with a rc plane of 37 miles , back in 1950 , and I still have the plane , has a rubber band powered servo (escapement) ...radio had tubes in it ....
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Old 10-24-2013, 05:27 PM   #12 (permalink)
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Quote:
Originally Posted by Bullfrog98 View Post
I do agree that it is a lot of money to spend on extra parts for a "one time thing", but it would be interesting just to see what can be done with the right combination of handpicked off-the-shelf parts.:
I totally agree. I'm thinking about maybe getting a motor meant for a 500 with a smaller shaft so I can run the smaller pinion. Right now I am running at an inefficiently low throttle setting. Another option would be 5S4P and a higher KV motor. What do you think?

Quote:
I like the battery configuration, have you considered doing away with the skids altogether and just landing on the batteries? You could add a thin layer of carbon or plywood to help save the batteries in a less than perfect landing. The savings in drag might be worth the effort
That's a really good idea

Quote:
Also, using a cheap plastic Logo 500 canopy might save you quite a bit of weight. You can find them here (they do seem a little more pricey than I remember though).
I'll look into it. Also, maybe I could vacuum form a better faring for the batteries and the back-side

Quote:
Lastly did you run any telemetry on the heli? I would think you would want to keep a close eye on your battery levels and signal strength etc.
I did not on back in May when I did this, but have since added it. Airspeed (pitot tube) and motor current are huge help.

John
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Old 10-24-2013, 05:28 PM   #13 (permalink)
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Quote:
Originally Posted by Dennis Everett View Post
Very cool ! congrats , a little off topic , my dad set the worlds record for distance with a rc plane of 37 miles , back in 1950 , and I still have the plane , has a rubber band powered servo (escapement) ...radio had tubes in it ....
That's awesome Dennis. What and accomplishment. Can you post a picture?
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Old 10-26-2013, 04:23 AM   #14 (permalink)
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If you have access to a vacuum form machine that would definitely be the way to go.

Also I would say your money would be best spent on some asymmetric blades. Matching the power train Kv to the head speed you want to run (as you said) would obviously also help a lot.
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Old 10-27-2013, 11:25 AM   #15 (permalink)
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I now have the asymmetric wide-cord blades, and they do indeed work great. Also, the autorotations (with a normal battery load) are really good - John
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Old 07-17-2014, 10:58 AM   #16 (permalink)
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FAI has ratified the following Class F (Model Aircraft) World record :
================================================
Claim number : 17097
Sub-class :F5 Open (Radio Control Flight)
Category: Helicopter
Group : Electrical Motor
Type of record : Distance in a straight line: 200
Performance : 30.00 km
Pilot : John A. McNeil (USA)
Date :26.04.2014
Previous record : 4.85 km (04.07.2004 - Raymond J. Pike, Australia)
================================================
FAI congratulates the Pilot on this splendid achievement.
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Old 07-17-2014, 03:56 PM   #17 (permalink)
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Default New world record: 25.73 km goal and return with Logo 600SE

Congratulations! Excellent job with the Logo. What improvements did you make from the last time? What's the next challenge?


Citizen #186
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Old 07-17-2014, 04:03 PM   #18 (permalink)
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Thanks! The only real changes where the addition of airspeed and current telemetry, and using 710mm asymmetric blades form Spin. This is a different record class too, (declared distance, one way).

The next challenge is 60km goal and return. I think I know how to do it...

John
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