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General control line discussion => Open Forum => Topic started by: Clay Schmidt on August 31, 2006, 10:13:55 PM
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Does anyone have pictures showing any kind of method of mounting a metal tank in a Imitation type profile? I'm looking for ideas.
TIA,
Clay
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Where are the experts on this one? Myself I use J-bolts screwed into the fuselage just above and below the tank with rubber bands. Another is to mount the tank to a peice of plywood that is bigger than the tank length wise. Have slots cut just in front of and in back of the tank. Screws go thru the slots so the tank can be moved up or down to get even engine runs between upright and inverted. Of course this depends on how much room between leading edge of wing and engine. I have even made the plywood plate deeper than the tank so the slots would be above and below the tank. Would post pictures, but, new camera program does not work properly. Hope I haven't confused you too much. DOC Holliday
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Thanks for the info Doc.
I've been doing a lot of butt scratching and I think I've come up with something that is adjustable, and isolates the tank from vibration. I'll post a picture or two when I get it done.
Clay
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I really like the vibration control part. Please post details.
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Not my idea but one that I borrowed.
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Well here is what I'm trying to do. It's not quite done but I think you'll get the idea. The black things are 80 duro lord mounts. I'll solder a slider bracket to each side of the the tank then bolt the tank to the rubber mounts. A cover will hide everything.
I'll post more pictures when I'm done.
Clay
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Here is a picture of the right side. After I get the tank mounted I'll fill the areas in the front and rear of the tank with balsa.
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Really neat Clay; Which one of your pattern planes engines is missing a couple of lord mounts? ;)
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Not my idea but one that I borrowed.
I stole the same idea, but for the foam rubber, I substituted a piece of air-cell (bubble-wrap) packing material.
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Actually Jim the lord mounts are off an old heli I had that's since gone to heli heaven. They were used to dampen the landing skid. You can purchase these through www.ronlund.com. They come four to a set. The part # is JRP960117
Some of the early engine soft mounts did use this type of dampner. They just didn't work very well.
Clay
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How did the bubble wrap work out? I never thought of it for vibration control, but it sure won't soak up fuel.
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Scurvy old tank, but you'll get the picture! Brodak Mounts soldered to tank. Then sqeeze GE Seal to the back edge of the tank. Now squish it down on a piece of waxed paper on a flat surface. Tomorrow morning peel it off, and trim of the excess silicone. Note two things here, There is more silicone at the rear of the tank. This moves the fuel pickup a little more outboard. Second, see that I replumbed the overflow vent away from the model where you will see the overflow when the tank is full.
Adjustable mounting.
Vibration absorbing.
Convenient!
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How did the bubble wrap work out? I never thought of it for vibration control, but it sure won't soak up fuel.
The AIr-Cell (bubble wrap) worked just fine. Rock-solid runs. It appears to be fuel-proof, too, at least at 10% Nitro.
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Scurvy old tank, but you'll get the picture! Brodak Mounts soldered to tank. Then sqeeze GE Seal to the back edge of the tank. Now squish it down on a piece of waxed paper on a flat surface. Tomorrow morning peel it off, and trim of the excess silicone. Note two things here, There is more silicone at the rear of the tank. This moves the fuel pickup a little more outboard. Second, see that I replumbed the overflow vent away from the model where you will see the overflow when the tank is full.
Adjustable mounting.
Vibration absorbing.
Convenient!
Ward,
Neat idea! I particularly like your vent. It would work well with the model I'm building.
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I got the tank mounting project finished up yesterday on the Armourized Tutor. My home made tank came out to 4.75 oz. I can adjust it up and down about 1/8" .
About my uniflow,,,the end of the tube is approximately 3/4 above the top of the tank. Should I leave it as is or loop it down?
The tank vent itself I stole from Ward's . Thanks Ward
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A couple more pictures.
Clay
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Ward,
Brilliantly simple solution to mounting tank on profile. I'll do it like that from now on....
Clay,
Very neat work, you're a true craftsman....
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Thanks for the Kudos Phil. I don't know about the craftsman part,,,I hacked plenty of tin up before I got the tank right. n~
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A couple more pictures.
Clay
Best workmanship I have seen in a while! good job!
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Clay,
Pretty muffler! Who built it? Whats it weigh? How much?
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Clay,
Really nice work!
I've never shock mounted my C/L tanks, but like your idea. I have a lot of those Lord mounts acquired while flying R/C, and I may try that some day.
I'm also curious about who makes that neat muffler?
Bill Adair
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Hi Bill & Ward,
The muffler is a Lite-Jett tube muffler. I got it from Dub Jett. His web site is www.jettengineering.com.
The muffler is very high quality and only weighs 1.2 oz or 34 grams. I weighed it myself using my gram scale.
Dub will fit these to about anything you want. He gets $35.00 plus a little for shipping.
Clay
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Bob & everyone else,
You are all too kind. It's nice to have a resource like this. You all help this ole retread more than you realize. :-*
Clay
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Clay:
What a very neat and well-executed technique!
I would like to emulate it on my next profile but I am uncertain about what kind of nose structure is necessary to support the use of the motor mount. Could you please describe how you built the nose to support the use of the motor mount?
Thanks in advance for your description.
Peter Hess
Canton, CT
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Peter,
There is nothing special about the nose structure. The fuselage is simply a 1/2 balsa core laminated with 1/64th ply doublers then the thick balsa triplers.
The firewall is 1/8 birch ply with 6/32 blind nuts installed to accomodate the Dave Brown engine mount. It's simply glued to the front of the fuselage with epoxy.
I'm building two of these. I'm beginning the second fuselage this weekend. If you'll be patient with me I'll take a few pictures along the way and post them.
Clay
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Thank you, Clay. Pictures would be terrific!
Peter Hess
Canton, CT
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Ty,
Thank you for the kind words. I hope I enjoy this plane as much as you do your Imitation. I know I'm having fun building it. I will post pictures of the process from time to time. Funny how a tank mounting thread is turning into a build thread. :)
Clay
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I'm going to start a new thread in the Building Technique section. I started another fuselage and I have pictures of the tank soft mounting process from the start.
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Hi Clay,
You have done a SUPER job on that ol' Tutor! I like everything I see there. y1
Get those pictures posted! **)
Bill <><
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Thanks Bill!
Clay