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Old Nov 26, 2008, 07:35 PM
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Thomasville, GA 31792
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OH NO!! Here I go on another wacko winch project.

The 18 HP Briggs winch works so well that I bought myself a nice little 5.5 HP Honda engine to play with. It'll be a lot easier to carry around, and it won't be as noisy. I think it'll work as well, since we were never putting much of a load on the Briggs engine. Hopefully, I'll have all the benefits without all the bother.

I've got some of the parts done and assembled, so I thought I'd post some pictures of the work in progress.

Roger
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Last edited by rogerflies; Nov 26, 2008 at 07:43 PM.
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Old Nov 26, 2008, 07:55 PM
ein flugel schplinterizer
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USA, FL, Pensacola
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Go Roger.....Go Roger.......You tha Man.......Go Roger!
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Old Nov 26, 2008, 08:12 PM
Hot Dawg Glider Pilot
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Roger, repeat after me..... I may be crazy, but I ain't stupid..... Go Roger... GO!!!
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Old Nov 26, 2008, 11:09 PM
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United States, MA, Waltham
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Not crazy enough. You need to hook this thing up with variable gears to an enormous flywheel with a clutch to the drum. Even the wing rod will blow off. Slip the clutch, toss the glider, and let it rip.
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Old Nov 27, 2008, 05:35 AM
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How much is that thing going to weigh?

Is this just a fun project or do you dislike electric winches?
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Old Nov 27, 2008, 08:46 AM
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It's probably going to weigh around 50 pounds. The typical size 27 battery weighs about 70 pounds. A Winch 2048 probably weighs about 40 pounds without the battery.

However, weight isn't the issue. The gas engine can be set to run at a constant speed, so you don't need to pulse the pedal during the launch. That makes launching a lot easier.

The other issue is cost. I can get a good engine for less than the cost of a good winch motor, and it'll outlast several batteries. I'll also save money by not having to buy solenoids, heavy wiring, connectors, etc.

I end up with a one-piece winch that's about half (or less) the weight of a complete electric winch outfit. It'll be easier to use. The initial cost will be less, and the cost over time will be less.

The only downside is the noise, which isn't an issue where I fly. Of course, I have to start the engine before a launch and shut it off after the launch, but the little Honda is so quiet, I may just leave it running between launches.

Roger
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Old Nov 27, 2008, 09:14 AM
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I just weighed the parts I've got done. The engine (with oil and about half a tank of gas), the clutch assembly, and the mounting base weigh 40.5 pounds. So, it'll probably end up a little under 50 pounds.

Roger
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Old Nov 27, 2008, 09:23 AM
Fly Smooooooooth
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Mountains of Utah
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Oh to have a machine shop in your own garage!!!

Can't wait to see how this turns out.
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Old Nov 27, 2008, 10:09 AM
<>< AKA W4BPS
USA, TN, Tullahoma
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lemme see it Roger..

I'm all eyes!!! Brian
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Old Nov 27, 2008, 04:35 PM
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Thomasville, GA 31792
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Yeah, it's nice to have some tools in my garage.

What's even nicer is that for $80 a quarter, I've got access to all the welding, machining, and fabricating equipment at the local technical college, including consumables, a wide range of material, and excellent instruction. That's got to be the bargain of a lifetime.

They do ask me to work on some things for the school and for some of the local government and youth groups, but those are usually pretty interesting projects that I can hone my skills on.

Roger
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Old Nov 27, 2008, 08:12 PM
ahh crap! crunch..
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Australia, QLD, Fraser Island
Joined Nov 2007
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Agreed! I so wish i had access to a proper workshop. Those little honda 4-strokes are pretty quiet, I use an older one occasionally for power and its fairly efficient.
I'm cooking some popcorn, getting a comfy seat and enjoying an innovative engineering thread. Roll on..
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Old Nov 27, 2008, 10:28 PM
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I'll bet if you added another 10 lbs for a large muffler and a sound deadening enclosure, it would become almost silent. You could make those parts detachable or something.
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Old Nov 30, 2008, 02:04 AM
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On Saturday, I made the drum end plate that fits on the hub I made Friday. It's flat on the side toward the engine, and tapered on the line side. The ID is a tight slip fit on the hub, and there's a recess for the hub tube to fit into. The six small holes are match-drilled to the holes on the flange of the hub, and then tapped. It takes a bit of setup time since all the surfaces have to be highly concentric.

I also tapped the four blind holes on the end of the hub for the rods that hold the drum together. That's the operation that's most likely to end in disaster, since a broken tap in a blind hole is really tough to deal with.

Roger
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Old Nov 30, 2008, 07:09 AM
<>< AKA W4BPS
USA, TN, Tullahoma
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Do you tap them by hand like I would have to do?? Just wondering. Brian


Quote:
Originally Posted by rogerflies
On Saturday, I made the drum end plate that fits on the hub I made Friday. It's flat on the side toward the engine, and tapered on the line side. The ID is a tight slip fit on the hub, and there's a recess for the hub tube to fit into. The six small holes are match-drilled to the holes on the flange of the hub, and then tapped. It takes a bit of setup time since all the surfaces have to be highly concentric.

I also tapped the four blind holes on the end of the hub for the rods that hold the drum together. That's the operation that's most likely to end in disaster, since a broken tap in a blind hole is really tough to deal with.

Roger
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