Ye Olde Rocket Forum

Go Back   Ye Olde Rocket Forum > The Golden Age of Model Rocketry > Plans & Publications
User Name
Password
Auctions Register FAQ Members List Calendar Today's Posts Search Mark Forums Read


Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 02-14-2013, 08:44 PM
JohnNGA's Avatar
JohnNGA JohnNGA is offline
Craftsman
 
Join Date: Aug 2010
Location: Jefferson, Georgia
Posts: 347
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
Reply With Quote
  #2  
Old 02-15-2013, 06:46 AM
Carl@Semroc's Avatar
Carl@Semroc Carl@Semroc is offline
Junior ??? Rocketeer
 
Join Date: Mar 2005
Location: Knightdale, NC
Posts: 1,470
Default

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 McLawhorn
NAR#4717 L2
semroc.com
Reply With Quote
  #3  
Old 02-15-2013, 09:10 AM
ghrocketman's Avatar
ghrocketman ghrocketman is offline
President, MAYHEM AGITATORS, Inc.
 
Join Date: Jul 2005
Location: Nunya Bizznuss, Michigan
Posts: 13,418
Default

Would like to see Carl produce the LIA-100.
Several would be sold surely.
I think the price for that LIA-77 sounded good.
__________________
When in doubt, WHACK the GAS and DITCH the brake !!!

Yes, there is such a thing as NORMAL
, if you have to ask what is "NORMAL" , you probably aren't !

Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY.
ALL systems are GO for MAYHEM, CHAOS, and HAVOC !
Reply With Quote
  #4  
Old 02-15-2013, 09:11 AM
JohnNGA's Avatar
JohnNGA JohnNGA is offline
Craftsman
 
Join Date: Aug 2010
Location: Jefferson, Georgia
Posts: 347
Default

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 03:23 PM.
Reply With Quote
  #5  
Old 02-15-2013, 10:36 AM
Doug Sams's Avatar
Doug Sams Doug Sams is offline
Old Far...er...Rocketeer
 
Join Date: Mar 2005
Location: Plano, TX resident since 1998.
Posts: 3,965
Default

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




.
__________________
YORF member #11
Reply With Quote
  #6  
Old 02-15-2013, 10:47 AM
ghrocketman's Avatar
ghrocketman ghrocketman is offline
President, MAYHEM AGITATORS, Inc.
 
Join Date: Jul 2005
Location: Nunya Bizznuss, Michigan
Posts: 13,418
Default

I'm pretty sure everthing on the 100 is up-scaled. Nothing is mentioned in this catalog page in the deflectors being different.
__________________
When in doubt, WHACK the GAS and DITCH the brake !!!

Yes, there is such a thing as NORMAL
, if you have to ask what is "NORMAL" , you probably aren't !

Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY.
ALL systems are GO for MAYHEM, CHAOS, and HAVOC !
Reply With Quote
  #7  
Old 02-15-2013, 10:53 AM
Doug Sams's Avatar
Doug Sams Doug Sams is offline
Old Far...er...Rocketeer
 
Join Date: Mar 2005
Location: Plano, TX resident since 1998.
Posts: 3,965
Default

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

.
__________________
YORF member #11
Reply With Quote
  #8  
Old 02-15-2013, 10:57 AM
Carl@Semroc's Avatar
Carl@Semroc Carl@Semroc is offline
Junior ??? Rocketeer
 
Join Date: Mar 2005
Location: Knightdale, NC
Posts: 1,470
Default

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.
__________________
Carl McLawhorn
NAR#4717 L2
semroc.com
Reply With Quote
  #9  
Old 02-15-2013, 11:06 AM
Royatl's Avatar
Royatl Royatl is offline
SPEV/Orion wrangler
 
Join Date: Mar 2005
Location: Atlanta, GA
Posts: 2,645
Default

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.
__________________
Roy
nar12605
Reply With Quote
  #10  
Old 02-15-2013, 11:55 AM
stefanj stefanj is offline
Master Modeler
 
Join Date: Mar 2005
Location: Hillsboro, OR
Posts: 2,845
Default

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.
__________________
NAR #27085 - Oregon Rocketry - SAM
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump



All times are GMT -5. The time now is 09:20 PM.


Powered by: vBulletin Version 3.0.7
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Ye Olde Rocket Shoppe © 1998-2024