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Building Tips and technical articles. => Building techniques => Topic started by: Mike Griffin on August 29, 2017, 03:53:23 PM
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At the point, the model weighs 9 1/2 ounces
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This is the core of the fuselage
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Just started putting mine together Mike. I'm a little confused, was there supposed to be 1/8 ply doublers for glow power included in the kit? All I got were 1/32 for electric. Do I have to make my own? The 1/32 are no good for mounting an engine.
Rich
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Just started putting mine together Mike. I'm a little confused, was there supposed to be 1/8 ply doublers for glow power included in the kit? All I got were 1/32 for electric. Do I have to make my own? The 1/32 are no good for mounting an engine.
Rich
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Hi Rich. There should be two sets of doublers in the kit and they are both 1/32, one is marked for glow engine. There are no 1/8th doublers in the kit. I have used the 1/32 for glow engines in the past with no problems. Eric Rule at RSM designed the UltraLite and did not feel it was necessary to use 1/8th inch ply for the doublers and to keep the model light. You could contact Eric if you wish if you feel like you need the 1/8th inch ply and he would probably cut you a set.
Mike
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I'm currently building the same ringmaster. I have had very good luck using only 1/32 ply for glo engines on ringmasters. On this ULRM I'll be using an os 20fp. I'd like a veco 19, but I I'd have to buy one. I add the little plastic mount pads under the engine, then I run 4-40 bolts through a T-nut on the other side. Then use a ny-loc nut as a jam nut and cut the bolts off flush. I have lots of ringmasters, several are made with the 1/32 ply doubler's and I've had no issues with stuff coming loose.
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Thanks for the replies mike and dane. I'll be sure to use a pad under the motor. I'm also going to use an FP20, should be fine. I guess when I looked at the plan and it showed the 1/8 doubler being used ithought it was included.
Rich
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Here's a little comparison. This scale is not modeling accurate. It's at best to the nearest 1/4 oz.
The first pic is the new ULRM. It's 3.75 no sanding and the engine mounts still too long.
The second pic is an original sterling kit. It is 3.75 also. It is finish sanded and there's no canopy. It's not getting any lighter. I think I can trim an ounce off the new ULRM pretty easy.