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Home✈️Aircraft🚁HelicopterHelicopter Main Discussion › M/R Head Balancing / Laser Level
01-13-2006 01:06 AM  13 years ago
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CWOAV8R

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Naples, FL USA

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M/R Head Balancing / Laser Level
I have, on occasion, been told that I have way too much time on my hands and here’s proof:

I was bound and determined to get something in the air New Years Day, so I was going over a Hawk I bought off RunRyder last year. It came down to static balancing the M/R blades and head and I was trying to figure out an easy way to “string” the head to get an accurate span line. That’s when I noticed my shiny new laser level on the bench just sitting there doing nothing. I won’t go into great detail, the pics should be enough, but it worked perfectly. Three turns of pitch link to bring the blades into track and my Hawk was smooth as silk.

Overkill… Probably, but it gave me something to do. It worked very well with the Hi-Point too.

There are a few more pics in my gallery if you care to look.

Later,
Ed
I tried flying upside down once... but I couldn't take the blood rushing to my head.
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01-13-2006 01:17 AM  13 years ago
tchavei

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Portugal

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You're scary mate!

Tony

--------------------
"Perfection and patience usually walk side by side..."
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01-13-2006 02:48 AM  13 years ago
darkfa8

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Brick, NJ - USA

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can we get some friggin' sharks with lasers on their heads? :P

i've seen these laser levels and thought there has to be something we can use them for, bingo!
- Dan Goldstein
Team Revolectrix
Lynx Heli Innovations
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01-13-2006 04:21 AM  13 years ago
Rogue123

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Phoenix AZ

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What did this do for you?
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01-14-2006 01:08 AM  13 years ago
CWOAV8R

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Naples, FL USA

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It ensures that the blades are "parallel" with each other. In other words I make sure that the laser line is the same distance aft of the leading edge on both blades. This will ensure that any static chordwise imbalance in the rotor system is not caused by one of the blades leading or lagging in the Hi-Point.

In a full scale example, on the Bell 206 rotor blades there is a raised rivet head at the tip of each blade the same distance aft of the leading edge. When setting the blades up for static balancing a string is taped spanwise to each of these rivets. The blades are then adjusted by the lead / lag bolts to ensure that they are perfectly aligned spanwise with the rotor head.

On an R/C helicopter if one of the blades is a little forward of the other during static balancing that will cause a chordwise imbalance which you would solve for by adding weight to the flybar or paddle. But... when you crank up the helicopter and the blades straighten out to the proper position the weight you added to the flybar or paddle is now going to cause a chordwise imbalance. Now, on the scale of R/C helicopters this may not even be noticible, but the more vibration you can get out of the helicopter (noticible or not) the less wear on both mechanical and electrical parts.

One of my favorite things to do at work is track and balance our aircraft. It is just kinda fun to take a 3200 pound helicopter that is trying to shake itself to death and in three or four flights and a few adjustments make it smooth as silk. I guess the same procedures and techniques that we use at work rolls off into my R/C size stuff. As soon as I can figure out how to hook up our dynamic balancing equipment I'm sure I'll try that too.

Like I said before "too much time on my hands"...
I tried flying upside down once... but I couldn't take the blood rushing to my head.
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01-14-2006 01:39 AM  13 years ago
Tailspinner

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JAMAICA, NY

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CWOAV8R, Will this work with any laser level? or should it be a high end level?


.
Are you on the list?
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01-14-2006 02:25 AM  13 years ago
CWOAV8R

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Naples, FL USA

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Any laser level should work. I like the Craftsman from Sears, $35.00.

It mounts right to a standard camera tripod.

Warning: When you get a laser level DO NOT start checking every thing in your house (counter tops, cabinets, walls, etc.) you won't be happy cause nothing in my house is level!

Craftsman Laser Trac™ Level with Carrying Case and Laser Enhancing Glasses
Sears item #00948251000
Mfr. model #LM013N
$34.99
I tried flying upside down once... but I couldn't take the blood rushing to my head.
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01-14-2006 02:43 AM  13 years ago
Tailspinner

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JAMAICA, NY

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Thanks for the info.Are you on the list?
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01-14-2006 02:53 AM  13 years ago
andres.c

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pan

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too much time in your hands you need a second hobby helis are not enough -- LOL great job very simple explanation I undestand it keep those ideas rolling
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01-14-2006 03:02 AM  13 years ago
Gary Jenkins

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Nowhere, US

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Interesting, but looks like over kill to me.
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01-14-2006 03:30 AM  13 years ago
jcrack_corn

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End of Time

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CWOAV8R:


hahaha, so true....when I was a first time homeowner and needed to do some repairs, i was disappointed to learn that houses are made of caulk and that even though I WOULD frame a wall 100% square (and adjust until it was) that real world framers pay almost no attention to if the wall is square or not (and it really doesnt matter).

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01-14-2006 03:36 AM  13 years ago
Tailspinner

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JAMAICA, NY

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That's the difference between building for yourself and building for someone else. Are you on the list?
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01-14-2006 03:37 AM  13 years ago
Tailspinner

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JAMAICA, NY

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If it dont fit, caulk it.Are you on the list?
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01-14-2006 04:27 AM  13 years ago
Rogue123

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Phoenix AZ

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Couldnt you just take the blades off and hang them on a nail? Thats what I do to check cord balance.
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01-14-2006 05:20 PM  13 years ago
spork

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Mountain View, CA

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Warning: When you get a laser level DO NOT start checking every thing in your house (counter tops, cabinets, walls, etc.) you won't be happy cause nothing in my house is level!
We are building and selling houses in California City as a side business. I invite you to come by with your laser level and check any suface you like.

RC
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01-14-2006 06:39 PM  13 years ago
Tioli

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Kona, Hawaii

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Sure it's overkill, but isn't that what we do as hobbyists? I get a kick out of the "Why didn't you just do it this way..." questions...the whole point is to see if it'll work THIS way...great job with the laser level...

A friend of mine was looking at a Saito Golden Knight engine (black and gold) the other day..."Payin' for paint." was what he said in a very dissmissive attitude. "Paying for paint is what we do as hobbyists, Cleve, I says." Making things look good, making them work just right...that's the hobby.
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01-14-2006 10:16 PM  13 years ago
spork

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Mountain View, CA

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Sure it's overkill, but isn't that what we do as hobbyists?
I agree completely. If I spend 16 hours balancing my head, and have fun doing it, it makes perfect sense.

RC
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02-11-2006 11:21 AM  13 years ago
Sticktime

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Toccoa, Ga.

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Amen!
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