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HelicopterMain Discussion › Tuning a nitro on top of a ladder
09-05-2009 03:04 AM  8 years agoPost 1
tamro

rrApprentice

Fort Mill South Carolina USA

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Greetings all

I had a conversation with a person how keeps insisting on mounting my nitro helicopter on top of a ladder to tune the motor basically zip tying it to the top of the ladder according to him and listen to the motor run in Idel 1 at the same time tack the main blades and adjust the pitch curve and needle valve.

What are your thoughts besides we are going to kill ourselves?

HeliPoPTer

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09-05-2009 03:07 AM  8 years agoPost 2
Sonic88

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Murfreesboro, TN

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You should NEVER spool it up attached to the ground. If you give it pitch it wants to go up, and by holding it down you are putting pressure on the heli. How experienced is this insistent friend of yours?

Not only is it bad for the heli, it can potentially be very dangerous should it break free for instance.

Procrastinators of the world unite ... tomorrow.
AMA #: 912822

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09-05-2009 03:09 AM  8 years agoPost 3
GimbalFan (RIP)

rrProfessor

Big Coppitt Key, FL

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Shut OFF your engine! Put DOWN your tx! Step AWAY from the ladder!

Then search YouTube for helicopter ground resonance for a vitally important update to your rotorcraft education.

op-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-t

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09-05-2009 03:10 AM  8 years agoPost 4
Harshflyer

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Seattle, Wa.

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(rolling up newspaper)... NO! NO! NO!

Still asking why

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09-05-2009 03:12 AM  8 years agoPost 5
tamro

rrApprentice

Fort Mill South Carolina USA

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Tuning a nitro on top of a ladder

keep them coming.

HeliPoPTer

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09-05-2009 03:22 AM  8 years agoPost 6
Ronald Thomas

rrMaster

Gainesville, Fl, USA

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Very bad idea and very dangerous........Ron

Team MikadoUSA 480XXTreme, 550SX, 600SX, 700XXTreme, 800XXTreme!!

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09-05-2009 03:24 AM  8 years agoPost 7
AltecLansing

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North Carolina

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LOL!

Man, I miss the eighties.

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09-05-2009 03:29 AM  8 years agoPost 8
helicatz

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nc

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wear a full body suit and take video from a distance. Tell your buddy to put his heli on the ladder. He is nutz

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09-05-2009 03:30 AM  8 years agoPost 9
BarracudaHockey

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Jacksonville FL

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Old gig of Ray Hostettler, I would think even he would tell you it's a bad idea today, I think that was in the very first version of his book along with tying it upside down from a soccer goal to learn inverted.

Andy
AMA 77227
http://www.jaxrc.com

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09-05-2009 04:22 AM  8 years agoPost 10
dkshema

rrMaster

Cedar Rapids, IA

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This topic pops up about once a year. Too bad the internet has no memory.

There was a time we would grab the tail boom of the helicopter and hover it to check tracking. I wouldn't do that today.

Nor would I tie my heli to anything to adjust it.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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09-05-2009 04:46 AM  8 years agoPost 11
Darren Lee

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Woodstock, GA

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Is this a joke?

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09-05-2009 04:55 AM  8 years agoPost 12
flyboy907

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woodstock, ga

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no offense to the op but that might be the dumbest thing I have ever heard since I started in the hobby. Hopefully commonsense will tell you wether or not to do that!!

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09-05-2009 05:00 AM  8 years agoPost 13
aussie_g

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Travelers Rest, South Carolina, USA

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I dont see what the problem is?

In the video, the whole test would have been fine if the builder of the chinook had read the manual and used locktite on the bolts...

You can clearly see at the end of the video that the jesus bolt came loose causing the rear rotor head to come off..

I have always believed that darwinism will take care of these issues for us

Gareth

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09-05-2009 05:00 AM  8 years agoPost 14
helidevil

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Brunswick, ME

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(rolling up newspaper)... NO! NO! NO!
+1!

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09-05-2009 05:30 AM  8 years agoPost 15
RotorTech321

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Scranton, PA. USA

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lol

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09-05-2009 05:58 AM  8 years agoPost 16
Blade_Master1

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Canada

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(rolling up newspaper)... NO! NO! NO!
+1!

never mind the newspaper wheres the baseball bat !!!

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09-05-2009 06:01 AM  8 years agoPost 17
Sillyness

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Little Rock AR

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I saw someone try it once. He did it on a table and used cinder blocks to weight the skids. It got resonating and almost ended catastrophically. Luckily he changed the pitch and hit idle-up and he saved it... and himself. This was before I knew anything about helis.

Here's how you tune it...

If it idles rough and keeps quitting, lean the low end.

Start the high-end rich. You should hear it 4-cycle now and again. As the motor breaks in start leaning the high end. Eventually the 4-cycling should get less frequent and shorter until it disappears. Then you are real close. While doing this, you should monitor the backplate temp with finger. You should be able to hold your finger on it for 5 seconds (on a .50). I find that with mine as the weather changes I need to jump back and forth on the needle by one click. When air density is down I have to lean it a click. When it's up I have to richen a click. When winter hits it requires an extra click or two.

Hope this helps. Please don't tie it down and find a new friend.

Please let us know if he tells you that you have to pick it up and point the nose at the sky to see if leans out (like they do with airplanes). If he does it, bring a camera, medical kit, and a cell phone.

Cheers

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09-05-2009 07:17 AM  8 years agoPost 18
shawmcky

rrElite Veteran

Isle of Wight,United Kingdom

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Would this be a 90 nitro?

Falling of a ladder 50 feet up aint funny either Not a good example to set a newbie or anyone for that matter,sure hope Justin Chi doesnt try it.

Team- unbiased opinion.K.I.S.S principle upheld here

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09-05-2009 07:34 AM  8 years agoPost 19
Dood

rrProfessor

Wescanson

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What are your thoughts besides we are going to kill ourselves?
My thoughts are that you shouldnt take advice from a planker pilot on how to tune a helicopter engine.

If you've ever seen a plank pilot tune a nitro engine, you'd know what I'm talking about.

It's a fine way to tune an engine... on a plank.

  ▲
▲ ▲

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09-05-2009 08:24 AM  8 years agoPost 20
tim deakin

rrVeteran

gloucestershire uk

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My friend has a book for beginers (its very old), it actaully tells you to put the heli on a ladder to tune it! I will try to get him to scan some pics. I think the book was by Robbe!!!

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HelicopterMain Discussion › Tuning a nitro on top of a ladder
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