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  #1  
Old 02-14-2013, 09:44 PM
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Default Centuri LIA-77 Launch pad

I came across an original Centuri igniter/deflector a while back and have been trying to replicate the tripod. I've built a couple by trying to scale from photos, just can't get the look right. Does anyone have one that could post tripod leg tracings or info?

Thanks John
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Old 02-15-2013, 07:46 AM
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John,

Legs are cut from 1/2" x 3" pine and base is from 1/4" masonite. Photo is here and pattern is here.

We were going to produce this last year, but the cost would have been in the $25 -$30 range. We felt that would be too high to continue the project. We have quotes on the blast deflector. I started to order a few just so I could produce a few pads for our use.

I saw an LIA-100 at TARC a few years ago. The student did not know what it was. He said he borrowed it from his Dad's old stuff. It had been well-used, but was still recognizable. I talked him into using the pad supplied by TARC and told him to go back and see if his Dad kept any of his other stuff from the 60's.
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Old 02-15-2013, 10:10 AM
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Would like to see Carl produce the LIA-100.
Several would be sold surely.
I think the price for that LIA-77 sounded good.
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Old 02-15-2013, 10:11 AM
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Quote:
Originally Posted by Carl@Semroc
John,

Legs are cut from 1/2" x 3" pine and base is from 1/4" masonite. Photo is here and pattern is here.

We were going to produce this last year, but the cost would have been in the $25 -$30 range. We felt that would be too high to continue the project. We have quotes on the blast deflector. I started to order a few just so I could produce a few pads for our use.

I saw an LIA-100 at TARC a few years ago. The student did not know what it was. He said he borrowed it from his Dad's old stuff. It had been well-used, but was still recognizable. I talked him into using the pad supplied by TARC and told him to go back and see if his Dad kept any of his other stuff from the 60's.


Carl,

Thanks so much for the scans and info, I should have a working LIA-77 in a couple of days. Thanks also for Semroc, great products but most important, the best customer service!


Thanks John

Last edited by JohnNGA : 02-15-2013 at 04:23 PM.
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Old 02-15-2013, 11:36 AM
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Quote:
Originally Posted by ghrocketman
Would like to see Carl produce the LIA-100.
Several would be sold surely.
I think the price for that LIA-77 sounded good.
Looking thru the Century catalogs, I don't see much diff between them. The only thing I see is the blast deflectors are different. The LIA-100 has an asbestos deflector while the LIA-77 uses steel.

What else did one get for the extra buck-twenty? Longer leads? 3/16" rod?

Doug




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Old 02-15-2013, 11:47 AM
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I'm pretty sure everthing on the 100 is up-scaled. Nothing is mentioned in this catalog page in the deflectors being different.
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Old 02-15-2013, 11:53 AM
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Quote:
Originally Posted by ghrocketman
I'm pretty sure everthing on the 100 is up-scaled. Nothing is mentioned in this catalog page in the deflectors being different.
Upscaled makes sense, since the 100 was targeted at Mini-Max rockets. But it's hard to tell from the pics.

The different deflector material is in the second bullet on each page.

Doug

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Old 02-15-2013, 11:57 AM
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It was larger in size. I think the legs were longer and the rest was the same, except for the 3/16" launch rod. The asbestos, if present, was a good idea. The blast deflector did not cover the masonite, so even the smaller engines would destroy it in a few launches. The LIA-77 I have does not have the asbestos pad.

The shipping weight was one pound more, 4 pounds for the LIA-100 vs 3 pounds for the LIA-77. I had plans for the LIA-100, but I cannot find them now.
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Old 02-15-2013, 12:06 PM
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Quote:
Originally Posted by Carl@Semroc
It was larger in size. I think the legs were longer and the rest was the same, except for the 3/16" launch rod. The asbestos, if present, was a good idea. The blast deflector did not cover the masonite, so even the smaller engines would destroy it in a few launches. The LIA-77 I have does not have the asbestos pad.

The shipping weight was one pound more, 4 pounds for the LIA-100 vs 3 pounds for the LIA-77. I had plans for the LIA-100, but I cannot find them now.


I would think even the asbestos would get blown away by the blast. I was tired of having Estes blast deflectors gunk and rust up, so I decided to paint a few with Hobbypoxy paint. Of course, the first launch simply blew a chunk of paint off! The second launch got under the paint layer and blew even more off. I bought a roll of asbestos paper, intending to glue it to blast deflectors, and to our club's rack launcher, but never did anything with it.
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Old 02-15-2013, 12:55 PM
stefanj stefanj is offline
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Skip the steel and the asbestos.

Ceramic is the way to go.

Or buy a few cheap galvanized roofing shingles and replace them as they burn through or get too grungy.
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