Thread Tools
Jul 09, 2012, 07:56 PM
Registered User
xwingnut's Avatar
Quote:
Originally Posted by tailsld
okay did not load here ...it is in the video /sailplane section under one winch..sorry
Here's a link to your video.

Whoa, that looked like a wild ride!
Sign up now
to remove ads between posts
Jul 09, 2012, 10:08 PM
Registered User
Yeah it was not one of the most relaxing launches I have had...gotta love cross winds. I really like the one winch.
Jul 11, 2012, 09:11 AM
3 Sons - Legos and Lift
2motheus's Avatar

Hands free launcher idea


Back to this suggestion of combining the OneWinch with a hands free launcher:
https://www.rcgroups.com/forums/show...473778&page=22

To make this work you would need a release trigger so that you know for sure when the plane is leaving and you have to step back.

Tim
Jul 14, 2012, 10:03 PM
Registered User
I posted a video of launching my 3 meter, 62 oz Oculus(mm glider tech). Nice launch little zoom at the end. Over several launches seems to be between 320 -340 ft heights. I did the walk back and "then reach back to get a bit more stretch" method. Actually had nice set into the wind today ( did not shift after setting the winch) about 10 mph. I do not know haow to make a link directly here so... uhem ... xwingnut?
Rick
Jul 14, 2012, 10:09 PM
Registered User
xwingnut's Avatar
I'm on it. Video link.
Jul 15, 2012, 10:52 AM
Registered User
Thanks Xwingnut for the help, I registered at You Tube.
Rick
Jul 19, 2012, 07:06 PM
Registered User
Had good launches with the Onewinch...did have one snag..no damage except pride

https://www.rcgroups.com/forums/show....php?t=1688434
Jul 19, 2012, 10:42 PM
3 Sons - Legos and Lift
2motheus's Avatar
Thank you, tailsld, for the great videos.

The first one, with the 2m Little Bird shows how high even a small plane can go when it's not lifting heavy winch gear or high start rubber.

And as I commented on the video thread, I recommend you start to move the hook back bit by bit on the Oculus. This plane should launch higher in wind. You also should work on coming off the line before the tension is gone, or at least don't dive deep if you coast off the top.

Thanks again for sharing your experiences.

Tim
Jul 20, 2012, 05:13 PM
Registered User
Actually I had tension and no airspeed, alot of wind. I pushed the nose down to get some forward motion to get off the hook. I will try the hook farther back and see.
Thanks Tim
Rick
Jul 20, 2012, 06:08 PM
Proud member of LISF and ESL
Quote:
Originally Posted by tailsld
Actually I had tension and no airspeed, alot of wind. I pushed the nose down to get some forward motion to get off the hook. I will try the hook farther back and see.
Thanks Tim
Rick
If you had no airspeed the plane would drop to the ground. If you had wind, and the plane was staying in the air, you had airspeed. Perhaps you had no ground speed, but that does not matter.
Aug 06, 2012, 05:47 AM
the answer 42 is
Hey 2motheus great idea

I had been reading the thread and seems very interesting method. I was developing something like that some years ago and then the HK brush less motors came in and my plan was abandoned.

I was wondering if the size of the pulley would have an effect on the line speed?? I mean with bigger pulley would the line move slower?? I thought that with a combination of sizes on could also optimize the system for different planes

EZ
Aug 06, 2012, 10:58 AM
3 Sons - Legos and Lift
2motheus's Avatar
Thanks, Edwin.

The OneWinch already has the ability to work at 4:1, 3:1, 2:1, and 1:1 speed ratios.

It isn't the size of the pulleys, but rather the number of loops at the pulling point that determines the ratio. The pulleys just serve to change the force direction, so the pulley diameters don't matter. This is not the same as the gears on a bicycle.

Tim
Aug 08, 2012, 02:59 AM
the answer 42 is
Oh thanks a lot, a clever idea indeed.

Regards

EZ
Aug 08, 2012, 09:25 AM
Proud member of LISF and ESL
I use the OneWinch in the standard pully set-up which is 4 to 1.

Are many people using it in a 3:1 set-up? That would give more pull but less speed.

How well does that work for you?
Aug 08, 2012, 01:31 PM
Proud member of LISF and ESL
Quote:
Originally Posted by 2motheus
We finally got a chance to make some measurements on a breezy day. We had sustained wind above 10 mph. It wasn't so strong that I couldn't penetrate forward with the Sagitta, but I hardly had to move on launch. I just took a few steps back to get things going, swung the plane back and forth two or three times while letting the line back out, then stepped back again for the zoom.

The first launch is 591 feet. The second is 556. Then the logger ran out of memory - didn't clear it before going out.

We changed the ratio down to 3:1 and my son pulled for a couple great launches. He weighs 105 pounds.

Video is in later post #185.

Tim

P.S. We also measured the distance we had to walk to pick up the chute. It was 60 to 70 feet. Without the zoom it would have landed almost at our feet.
This was such a valueable report that was burried way back in the thread, so I thought I would quote it and bring it forward.


Here is a link to the post with the video.
https://www.rcgroups.com/forums/show...&postcount=185

Ed


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion New discus launch method ? Nathan Schmoekel Hand Launch 8 Jan 22, 2009 09:13 PM
Discussion New launch method Larry051967 Hand Launch 34 Dec 30, 2008 08:30 AM
Art Hobby's Sling Shot launch method? John Gallagher Hand Launch 6 Sep 19, 2003 11:54 AM
Sling launch method John Gallagher Hand Launch 1 Sep 19, 2003 11:53 AM
GWS A-10 Best Method to launch walter40 Electric Ducted Fan Jet Talk 4 Jun 08, 2003 02:47 PM