Ye Olde Rocket Forum

Go Back   Ye Olde Rocket Forum > Swap Shoppe > Wanted: Dead or Alive!
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 09-05-2018, 12:37 AM
K'Tesh's Avatar
K'Tesh K'Tesh is offline
Seagulls Beware...
 
Join Date: Apr 2013
Location: Subject to Change
Posts: 857
Lightbulb WANTED: Scans of the Centuri Magnum Sprint (5356)

OK, I have a Semroc Centuri Magnum Sprint (KV-67), now OOP, and I'm working on a .ork file for it. However, I want to do a comparison between it and the Centuri Magnum Sprint (5356). Problem is: None of the regular sources for instructions have them.

What I do know: According to the description found in 1983 Centuri Catalog)(and the 1982 catalog)(both found on Ninfinger's site), the Magnum Sprint has a plastic nosecone. HOWEVER, the photo doesn't seem to back that up, if the Semroc kit is accurate in its implication (BNC-55AC -> PNC-55AC), but that photo shows a blunter nosecone than the PNC-55AC.

What I need... Scans of the instructions, fins, decals (along with a ruler for scale). Photos of an original would also be helpful.

Thanks!
Jim

__________________
.
.

Dreaming of making the rockets I dreamed of as a kid (and then some).

"The Guide says there is an art to flying", said Ford, "or rather a knack."
"The knack lies in learning how to throw yourself at the ground and miss."


Launching is Optional... Landing? That Depends on Trees.

Last edited by K'Tesh : 09-05-2018 at 10:52 AM.
Reply With Quote
  #2  
Old 09-05-2018, 08:42 AM
tbzep's Avatar
tbzep tbzep is online now
Dazed and Confused
 
Join Date: Mar 2005
Location: TN
Posts: 8,655
Default

The catalog photos look like the PNC-55AC to me. That's the same cone as the later plastic version Goblin, Meteor, Vigilanti etc. By that time, new Centuri stuff was coming out with Estes parts. Sorry, but I don't have documentation.
__________________
I love sanding.
Reply With Quote
  #3  
Old 09-05-2018, 09:14 AM
K'Tesh's Avatar
K'Tesh K'Tesh is offline
Seagulls Beware...
 
Join Date: Apr 2013
Location: Subject to Change
Posts: 857
Default

Quote:
Originally Posted by tbzep
The catalog photos look like the PNC-55AC to me. That's the same cone as the later plastic version Goblin, Meteor, Vigilanti etc. By that time, new Centuri stuff was coming out with Estes parts. Sorry, but I don't have documentation.


Looking at the catalog photos, the nosecone seems to be too blunt for a PNC-55AC. That said, the instructions in the Semroc Magnum Sprint (KV-67) mentioned that the rocket was completely built with Estes parts, and directly mentioned that the original used the PNC-55AC.

Here's what a stock build of the Semroc Magnum Sprint would look like:



Here what it'd look like after swapping in an Estes PNC-55AC:



And finally, what it'd look like with an Estes PNC-55AO:

__________________
.
.

Dreaming of making the rockets I dreamed of as a kid (and then some).

"The Guide says there is an art to flying", said Ford, "or rather a knack."
"The knack lies in learning how to throw yourself at the ground and miss."


Launching is Optional... Landing? That Depends on Trees.

Last edited by K'Tesh : 09-05-2018 at 10:49 AM.
Reply With Quote
  #4  
Old 09-05-2018, 09:33 AM
tbzep's Avatar
tbzep tbzep is online now
Dazed and Confused
 
Join Date: Mar 2005
Location: TN
Posts: 8,655
Default

Sorry, got the numbers mixed in my head. The catalog looks like PNC-55AO, which is the Vigilante, Meteor, Goblin, etc. cone.

55AC is the Cherokee nose cone and is pointed.
__________________
I love sanding.
Reply With Quote
  #5  
Old 09-05-2018, 09:53 AM
K'Tesh's Avatar
K'Tesh K'Tesh is offline
Seagulls Beware...
 
Join Date: Apr 2013
Location: Subject to Change
Posts: 857
Default

Quote:
Originally Posted by tbzep
Sorry, got the numbers mixed in my head. The catalog looks like PNC-55AO, which is the Vigilante, Meteor, Goblin, etc. cone.

55AC is the Cherokee nose cone and is pointed.


That makes a lot more sense... Still we've got the disparity between the information contained in the Semroc kit (using a balsa BNC-55AC to replace the PNC-55AC used by Centuri), and the photos in the catalogs which do look a lot like a PNC-55AO.
__________________
.
.

Dreaming of making the rockets I dreamed of as a kid (and then some).

"The Guide says there is an art to flying", said Ford, "or rather a knack."
"The knack lies in learning how to throw yourself at the ground and miss."


Launching is Optional... Landing? That Depends on Trees.
Reply With Quote
  #6  
Old 09-05-2018, 10:58 AM
K'Tesh's Avatar
K'Tesh K'Tesh is offline
Seagulls Beware...
 
Join Date: Apr 2013
Location: Subject to Change
Posts: 857
Default

I've edited in the Ninfinger images from the 1983 catalog... and noticed something else that really casts doubt on the PNC-55AC being used with the Magnum Sprint. If you look at the Magnum Hornet on the same page, it clearly has a PNC-55AC nosecone, and it looks nothing like the Sprint's nosecone.
__________________
.
.

Dreaming of making the rockets I dreamed of as a kid (and then some).

"The Guide says there is an art to flying", said Ford, "or rather a knack."
"The knack lies in learning how to throw yourself at the ground and miss."


Launching is Optional... Landing? That Depends on Trees.
Reply With Quote
  #7  
Old 09-05-2018, 12:25 PM
ghrocketman's Avatar
ghrocketman ghrocketman is offline
President, MAYHEM AGITATORS, Inc.
 
Join Date: Jul 2005
Location: Michigan
Posts: 8,792
Default

I had built both the Centuri Magnum Sprint and Magnum Hornet kits back when released in the early 80's. They both had plastic nose cones. The Sprint used the same cone as Vigilante/Skybolt/ Cobra 1500; PNC55AO. The Hornet used the Cherokee-D/Nike-X cone; PNC55AC.
My Sprint POWR-PRANGED on it's second flight in ~1986 due to an offset thrust D11-9.
Incidentally, every time I flew a Cherokee-D or Skybolt on a D12-5 or D11-9 I got them back. Every launch on a D12-7 I lost them. 6 Cherokee-D's and 2 Skybolts.
Actually got a Cherokee-D back from an old E-kaboom15-8 flight but replaced the idiotic 18" chute with a streamer.
__________________
When in doubt, WHACK the GAS and NEVER touch the brake !!!
No Harm=NO Foul advocate

If you are NOT FLYING LOW in the left lane, you need to GET THE #$&@ OUT of it !

Yes, there is such a thing as NORMAL
, if you have to ask, you probably aren't
!
Reply With Quote
  #8  
Old 09-05-2018, 07:48 PM
K'Tesh's Avatar
K'Tesh K'Tesh is offline
Seagulls Beware...
 
Join Date: Apr 2013
Location: Subject to Change
Posts: 857
Default

Quote:
Originally Posted by ghrocketman
I had built both the Centuri Magnum Sprint and Magnum Hornet kits back when released in the early 80's. They both had plastic nose cones. The Sprint used the same cone as Vigilante/Skybolt/ Cobra 1500; PNC55AO. The Hornet used the Cherokee-D/Nike-X cone; PNC55AC.
My Sprint POWR-PRANGED on it's second flight in ~1986 due to an offset thrust D11-9.
Incidentally, every time I flew a Cherokee-D or Skybolt on a D12-5 or D11-9 I got them back. Every launch on a D12-7 I lost them. 6 Cherokee-D's and 2 Skybolts.
Actually got a Cherokee-D back from an old E-kaboom15-8 flight but replaced the idiotic 18" chute with a streamer.


Thanks for the info!

It would look like Carl's instructions were inaccurate when it comes to the PNC-55AC then.
You wouldn't happen to have the instructions or any photos of it laying about would you?
__________________
.
.

Dreaming of making the rockets I dreamed of as a kid (and then some).

"The Guide says there is an art to flying", said Ford, "or rather a knack."
"The knack lies in learning how to throw yourself at the ground and miss."


Launching is Optional... Landing? That Depends on Trees.
Reply With Quote
  #9  
Old 09-05-2018, 10:40 PM
ghrocketman's Avatar
ghrocketman ghrocketman is offline
President, MAYHEM AGITATORS, Inc.
 
Join Date: Jul 2005
Location: Michigan
Posts: 8,792
Default

Have nothing left of the Sprint unfortunately. I remember it mangled the cone.
I think I still have the Hornet somewhere buried in a crate, but that does no good.
__________________
When in doubt, WHACK the GAS and NEVER touch the brake !!!
No Harm=NO Foul advocate

If you are NOT FLYING LOW in the left lane, you need to GET THE #$&@ OUT of it !

Yes, there is such a thing as NORMAL
, if you have to ask, you probably aren't
!
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 04:02 PM.


Powered by: vBulletin Version 3.0.7
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Ye Olde Rocket Shoppe 1998-2018