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  #21  
Old 12-17-2012, 10:41 AM
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Pro-Series Impulse- 2x24mm
Pro-Series Maxi-Force- 3x24mm
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  #22  
Old 12-17-2012, 11:44 AM
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pro series Patriot took 4 engines as well?
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  #23  
Old 12-17-2012, 12:02 PM
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Thank You
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  #24  
Old 12-17-2012, 12:09 PM
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Saturn V SHOULD have taken 3x24mm !

Why the shorter K29 Saturn 1B got 4 engines but the LARGER Saturn V got only 3 is a real mystery to me. Any insight on that one Doc ?


Powering anything 3" in diameter LET ALONE 4" on a single D12 or even an E12 results in a LAME-O flight, PERIOD.

One of those X-prize kits was a 2x18mm cluster also.
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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 !
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  #25  
Old 12-17-2012, 12:53 PM
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Quote:
Originally Posted by ghrocketman
Saturn V SHOULD have taken 3x24mm !
Understood, but keep in mind the 1/100 scale Sat V predated the D motor by a few years.


Quote:
Why the shorter K29 Saturn 1B got 4 engines but the LARGER Saturn V got only 3 is a real mystery to me.
The K29 was a 1/70 scale kit, and thus it was almost as big as the Saturn V (1B@9.86 oz vs SatV@9.9 oz, per 1969 catalog). But I agree, the Saturn V coulda been a 4-engine kit to begin with.

Doug

.(corrected scale of K29 Sat 1B)
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Last edited by Doug Sams : 12-17-2012 at 02:07 PM.
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  #26  
Old 12-17-2012, 01:46 PM
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I believe that K-29 Saturn 1b was actually 1/70th size, but regardless, concerning the mass point taken.
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  #27  
Old 12-17-2012, 02:07 PM
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Quote:
Originally Posted by John Brohm
I believe that K-29 Saturn 1b was actually 1/70th size, but regardless, concerning the mass point taken.
Thanks, John! I was trying to say that, but got my wires crossed

Doug

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  #28  
Old 12-17-2012, 02:21 PM
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Yeah...know the K29 S1B is 1/70, but my point was the SV was larger in length by about 7-8 ins. It should have been at least 4 if not 5 engines. At one point Estes listed 4xA8-3 as suitable for the K29 Saturn 1B. What an idiotic idea. Total impulse of ONE C engine with a 3 second delay. Sounds like an insta-crash after a 50' apogee flight. ANYTHING that big should have a 4xC cluster minimum. A 4xC5-3 flight is actually quite nice.
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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 !
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  #29  
Old 12-17-2012, 04:15 PM
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Quote:
Originally Posted by ghrocketman
Why the shorter K29 Saturn 1B got 4 engines but the LARGER Saturn V got only 3 is a real mystery to me. Any insight on that one Doc ?


Real simple. When the Saturn 1B came out, the biggest single stage motor Estes had was the B.8-4*. By the time the Saturn V came out, they were making C6-3's.

*They had a C.8-0, but no C's with ejection charges.
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  #30  
Old 12-18-2012, 08:53 AM
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Quote:
Originally Posted by tbzep
Real simple. When the Saturn 1B came out, the biggest single stage motor Estes had was the B.8-4*. By the time the Saturn V came out, they were making C6-3's.

*They had a C.8-0, but no C's with ejection charges.


I would suspect too that Estes got more than one complaint from customers that FOUR engine clusters were just too hard to light successfully on a routine basis.

We don't think much about it now, but ignitor technology circa 1969 wasn't quite as reliable as it is today and I'm sure Vern's mailbox got filled with more than one letter stating how they crashed their 1b because one or more motors failed to ignite.

Earl
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