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HomeAircraftHelicopterMain Discussion › Lifting with an RC helicopter
10-24-2009 06:56 PM  8 years agoPost 1
MarkJC

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Missouri

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Hi folks,

A friend and I are having a debate on which would be the best way to lift a 1.5lb object using an RC helicopter. We would be using either a rope/cable/pipe that is at least 2ft long, and it would be suspended from the bottom of the helicopter.

He's in favor of using a rope that is capable of swinging, and i'm in favor of a rigid object fixed in place to the bottom of the helicopter like a lightweight pvc pipe. Neither of us has attempted this with a helicopter before, and we're not entirely sure how the two configurations would affect the helicopter's flight.

We both know that if the weight was suspended by a rope and began swinging, it would cause really erratic flight from the helicopter and would make it very hard to handle. But we're both uncertain about how a rigid object like a pipe, incapable of swinging, would affect the helicopter's flight. Would it actually stabilize the helicopter in a sense making it easier to hover in place since it would be more difficult to turn/fly forward? Or would the heli be just as hard to control as if we were using a rope capable of swinging?

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10-24-2009 07:10 PM  8 years agoPost 2
xcellgasman101

rrElite Veteran

WOODWARD, OKLA....

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A rope would be the easiest, How are you going to attach a 2' piece of pvc to the heli, and take off, and land, you would have to have some kind of swivel joint to be able to take off and land, with the rope it would be no problem, and as long as you flew easy, it shouldn't be a problem,, XGM/VGM

John Crotts
www.soonerhelicamproductions.com

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10-24-2009 07:17 PM  8 years agoPost 3
bkervaski

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Birmingham, AL, USA

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Four points of twine equal length from where your struts meet your skids to balance the weight out. A swivel and hook for the final payload. My $0.02.

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10-24-2009 07:19 PM  8 years agoPost 4
TachyonDriver

rrKey Veteran

Chipping, Lancs, UK

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The size of the heli used would be an issue also. Bigger is better..

Little Spinning Bundle of Joy® DON'T DISS THE DINO!!

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10-24-2009 07:19 PM  8 years agoPost 5
yeehawtex

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kissimmeee,fl USA

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make shure you got plenty of power.
i have tried to lift things with my heli before you got to have a lot of power for the smalest things though.i used a four point harnes to lift things around my house.it makes it more stable in my eyes and in flight although all i got was about 4 minutes of flight because my battery was getting drained fast.i used a 4 channel for that fun day though never tried it with 6 channel.

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10-25-2009 12:09 AM  8 years agoPost 6
Leif

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USA

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1.5 pounds should be no problem for a 50-class heli. Even a 30-class should be able to lift that.

Your pipe description doesn't make any sense. The pipe would need to be "hinged" to allow you to take off and land, right? That said, if you use light rope you can run the risk of it being sucked into the rotors or tail when it's on the ground. It might be a good idea to use a length of light rope tied to a length of plastic pipe.

The flight characteristics don't change too much with extra lifting weight. If you get too much weight, the tail control starts to get twitchy and the heli resists cyclic inputs (the heli is slower to respond to cyclics).

As the inventer of the heli saw learned, it also isn't a bad idea to design in the capability to remotely drop the payload in flight. Even if you don't plan to do drops, you might encounter a situation when it's best to jettison the payload along with the rope/pipe.

Also, if you are hanging a payload at the end of a flexible rope/string; make sure that the weakest point is the connection point at the heli. Otherwise, if the weight drops off the rope in flight, it can shoot the rope up into the rotor blades.

Leif

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10-25-2009 12:25 AM  8 years agoPost 7
GimbalFan (RIP)

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Big Coppitt Key, FL

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As the inventer of the heli saw learned, it also isn't a bad idea to design in the capability to remotely drop the payload in flight.
Ahhh, the heli saw. That one never gets old.

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

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10-25-2009 12:25 AM  8 years agoPost 8
rcjon

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Macon, GA

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Tie 2 wooden dowels thru the skids so that they cross beneath the main rotor shaft. Tie a line at the crossing to support the load.

Use a spotter to watch the load while the pilot watches the heli.

Ask your doctor if your heart is healthy enough for Radio Control Helicoptering.

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10-25-2009 12:51 AM  8 years agoPost 9
fast400

rrApprentice

shelby twp. michigan

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i`ve seen video`s on youtube of the blade400 lifting a full sack of orange`s.
but flying with the sack is a different story.

crash`s come easy patience`s doesnt

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10-25-2009 01:02 AM  8 years agoPost 10
rcjon

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Macon, GA

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The heli-saw = one bad MF.

Ask your doctor if your heart is healthy enough for Radio Control Helicoptering.

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10-25-2009 01:53 AM  8 years agoPost 11
1stSgtBang

rrNovice

Waipahu, Hawaii USA

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GS Baron Lift
Awhile back in 1978 we used a GS Baron, the 22 CC Kalt motor with 700 wide cord blades. My helo had a twin starr fuse and we lifted 12 lbs with it flying. As for towing a cable? I am not so sure, but the head speed has to match lift and control ability.....meaning if it can lift it, does the aircraft respond as fast? If no, then the head speed is too slow......if it over corrects, the head speed is too high. The other part we learned is that even though we had lifted 15lbs, the aircraft was sluggish........but doable. The tail rotor will need to have longer blades and a gyro that is very stable.

Lastly, to do what you are doing, we four (4) pointed the netting of what we carried......your best bet is to not use the skids......but use four (4) fixed points that do not affect the aircraft...ie frame or stationary solid part of the aircraft. to prevent vibration to induce into the engine or the gyro.

Lastly if you noticed on Helo Drones and such the have a hughe blade span and the head speed varies, do not use a 4 bladed head, too stiff. and if you plan on dragging anything attached to the bird, just a remote cutoff to jettison the load in case the aircraft is uncontrolled or losing the load. Only fly during no wind or low wind conditions. I was a former Marine on CH46 Helo's and CH53's, and the lower the wind conditions the better the load controalability, especially if the wind starts to dictate where you fly or how it is flown....good luck......1stSgtBang

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10-25-2009 01:58 AM  8 years agoPost 12
krashtagain

rrKey Veteran

ohio

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Which ever way you choose to do the lift just make sure to get it on camera for us .

If you're not living on the edge you're just taking up space !

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10-25-2009 03:19 AM  8 years agoPost 13
Jlerch

rrApprentice

Parrish, Florida

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My version

Watch at YouTube

1st attempts (yea 24 lbs was doable, but spooky)

Watch at YouTube

The Purpose

Watch at YouTube

The Goal (to help kids in need)

Watch at YouTube

Playing around with it today:

Watch at YouTube

James Lerch - Tampa Bay FL

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10-25-2009 03:34 AM  8 years agoPost 14
fast400

rrApprentice

shelby twp. michigan

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hey man, that is really good stuff right there.

and for charity to boot, you cant get a heli in the news and then have it for a better cause than that.
that`s just good for all, awsome man just awsome.

crash`s come easy patience`s doesnt

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10-25-2009 04:48 AM  8 years agoPost 15
MarkJC

rrNovice

Missouri

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Thanks for the tips. The big problem is that we're very limited on budget at less than $150. A helicopter we were considering that was below that price was a 30 class eco-8. It weighs less than 3lbs, and the weight we would need to lift would be about 1.5lbs.

What we're aiming to do is to pick up a weight and deposit it onto a stairway with an electromagnet and a switch to attach/detach the weight by controlling current to the magnet. We would need to hover above the weight until it is attached, allow the helicopter to raise the weight, and then fly forward in order to deposit it.

We're both skeptical that we would be able to pull this off successfully with a class 30 in our price range without totally wrecking the thing.

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10-25-2009 05:34 AM  8 years agoPost 16
McKrackin

rrProfessor

Lucasville,Ohio

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My friend lifted 18 lbs with his Trex 600 ESP so a 30 heli should have no problem with the light weight you're talking about.

I literally never use the word literally right.

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10-25-2009 11:09 AM  8 years agoPost 17
Seablade

rrKey Veteran

earth

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...

"Vini, Vidi, Velcro"

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10-25-2009 08:45 PM  8 years agoPost 18
46Taylorcraft

rrKey Veteran

AZ

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If you're planning to precision drop an object from an RC heli then you do not want to sling load. Better off to make a device on the helicopter to hold your payload then drop it. You're positioning accuracy of the object will be far greater than sling loading.

1.5lb is not much weight. Any 500 class helicopter can lift that all day long.

Perhaps you want to custom make a set of frames that allows for payload to be placed up underneath the frames similar to a Skycrane. Here's our 800 class HALO project. 8.5 lb empty weight with max gross at about 23lb.

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10-26-2009 07:34 AM  8 years agoPost 19
Dood

rrProfessor

Wescanson

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The big problem is that we're very limited on budget at less than $150.
I know Helicopters in that price range that have enough trouble getting off the ground WITHOUT a payload.

  ▲
▲ ▲

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10-26-2009 08:05 AM  8 years agoPost 20
McKrackin

rrProfessor

Lucasville,Ohio

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What we're aiming to do is to pick up a weight and deposit it onto a stairway with an electromagnet and a switch to attach/detach the weight by controlling current to the magnet.
How are you planning to power the magnet?What type of switch?

Sorry.I'm just now reading this through.
$150 ?? Seriously?

I literally never use the word literally right.

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HomeAircraftHelicopterMain Discussion › Lifting with an RC helicopter
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