Ye Olde Rocket Forum

Go Back   Ye Olde Rocket Forum > Weather-Cocked > Current Kit Talk
User Name
Password
Auctions Register FAQ Members List Calendar Today's Posts Search Mark Forums Read


View Poll Results: Which motor do we need most ?
B14-x (18mm) 36 32.73%
D30-x (24mm) 15 13.64%
D8-x (18mm like the old Cox D's, not some 20mm oddball diameter) 14 12.73%
A8-0 (18mm) 21 19.09%
1/2A3-0T (13mm) 11 10.00%
C5-x (18mm) 13 11.82%
Voters: 110. You may not vote on this poll

Reply
 
Thread Tools Search this Thread Display Modes
  #11  
Old 09-14-2010, 10:50 PM
Jerry Irvine's Avatar
Jerry Irvine Jerry Irvine is offline
Freeform rocketry advocate.
 
Join Date: Jan 2008
Location: Claremont, CA "The intellectual capitol of the world."-WSJ
Posts: 3,780
Default

Quote:
Originally Posted by 5x7
E60 27mm

You know, Lonnie and Larry basically made those on a garage workbench for decades. It would not be all that hard to duplicate the production process of FSI.

Jerry
Reply With Quote
  #12  
Old 09-15-2010, 08:43 AM
ghrocketman's Avatar
ghrocketman ghrocketman is offline
President, MAYHEM AGITATORS, Inc.
 
Join Date: Jul 2005
Location: Nunya Bizznuss, Michigan
Posts: 13,443
Default

Thanks, Harold for your useless unsolicited comment that added nothing worthwhile.

That being said, I'd gladly welcome the B8 series back if the B14 is not possible by ANYONE.

My hope is that SOME manufacturer will step up and fulfill the need/want for an 18mm booster that is capable of getting a 3-stager over 4oz. mass up and moving vertically.

If the B8 comes back, I want it in all flavors -3,5,7,0 so it can be used in place of all existing B engines.
If B14, I'd want -3,5,7,0; I realize the -3 delay never existed in the past on the B14, but I see it as having much more value than the old -6 delay that I never understood.

For the vast majority of rockets I favor fast-burn high-thrust motors.
The ONLY thing a slow-burner such as the B4 is better at than a high-thrust motor is in very light rockets or for max altitude of an upper stage of multi-stagers.

I'd actually like ANY manufacturer to bring out some high-thrust port-burning (drilled or pressed around a pintle, I don't care) single-use black powder 18mm and 24mm motors instead of low-thrust for-impulse motors that NOBODY I'm aware of is asking for.

One of the most entertaining flights I have ever seen is taking a 2-stage rocket and placing a 1/2A6-0 or A8-0 in the booster with a B14-7 in the sustainer. Stages low and slow than zooms off like a bullet from the B14.
__________________
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 !

Last edited by ghrocketman : 09-15-2010 at 09:01 AM.
Reply With Quote
  #13  
Old 09-15-2010, 09:04 AM
Rocketflyer's Avatar
Rocketflyer Rocketflyer is offline
Member in Good Standing!
 
Join Date: Sep 2006
Posts: 1,209
Default

Since the B14 is not to be, I'd like to see the B8. As for the others, I'd like a D30 booster, D8 in flavors, and the C5, in a booster and delays of 3,5,7. The rest, I don't much care about them, but would fly if I was on a small school field.
__________________
Enjoy life, it has an expiration date.
Reply With Quote
  #14  
Old 09-15-2010, 09:48 AM
ghrocketman's Avatar
ghrocketman ghrocketman is offline
President, MAYHEM AGITATORS, Inc.
 
Join Date: Jul 2005
Location: Nunya Bizznuss, Michigan
Posts: 13,443
Default

The problem with the C5 is that they claim they can't get more than a -3 delay in the existing case, which is hogwash as Cox did it with the D8-3 in the EARLY 70's !
If you can get any sort of D8-3 in a 18mmx2.75 in case, you certainly could get a C5-5.
Don't think you could get more than a C5-5 in the existing 18mm case though and that would be filled to the TOP.
__________________
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
  #15  
Old 09-15-2010, 10:17 AM
Joe Wooten's Avatar
Joe Wooten Joe Wooten is offline
Master Modeler
 
Join Date: Aug 2010
Posts: 1,164
Default

B14-0,3,5,7
C5-0
C11-0
Reply With Quote
  #16  
Old 09-15-2010, 01:15 PM
Joe Wooten's Avatar
Joe Wooten Joe Wooten is offline
Master Modeler
 
Join Date: Aug 2010
Posts: 1,164
Default

Quote:
Originally Posted by 5x7
E60 27mm


That engine was a piece of crap. 2 out of every 3 catos.
Reply With Quote
  #17  
Old 09-15-2010, 08:31 PM
5x7's Avatar
5x7 5x7 is offline
Sometimes collector
 
Join Date: May 2008
Posts: 1,786
Default

Quote:
Originally Posted by Joe Wooten
That engine was a piece of crap. 2 out of every 3 catos.


I flew about 20 with no catos. YMMV
Reply With Quote
  #18  
Old 09-15-2010, 11:53 PM
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 STRMan
The engines that I would like to see that aren't on that list is the 1/2A6-0 and 1/2A6-4. These are the IDEAL small field staging engines. They are still making the 1/2A6-2, so it wouldn't be like recreating something long out of production, like a B14 or B8.



And the 1/2A6-4 is the perfect motor for the Astron Scout (I flew two at NARAM 50 -- I didn't realize, nor did anyone else, that they were no longer certified. Perfect flights, both of them).
__________________
Roy
nar12605
Reply With Quote
  #19  
Old 09-16-2010, 08:41 AM
ghrocketman's Avatar
ghrocketman ghrocketman is offline
President, MAYHEM AGITATORS, Inc.
 
Join Date: Jul 2005
Location: Nunya Bizznuss, Michigan
Posts: 13,443
Default

Agree that the E60 was a total piece of crap.
I had an over 60% cato rate with those stinkers.
Only motor I had a higher cato rate with than the F100.
Made the F100 seem actually reliable; I had about a 40% cato rate with those things.
Apparently the motor manufacturing team of those had not heard much about QC.
__________________
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
  #20  
Old 09-16-2010, 10:11 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 Royatl
And the 1/2A6-4 is the perfect motor for the Astron Scout (I flew two at NARAM 50 -- I didn't realize, nor did anyone else, that they were no longer certified. Perfect flights, both of them).
I'm surprised the delay wasn't too long. I woulda guessed a -2 was better. While the Scout is kinda simple, lacking a chute and wadding, it's still kinda heavy with the thick-walled tube and thick fins, and not very aeroslick.

That said, looking at the thrust curves of the ½A6 and ½A3, they're very close. I'd say close enough that I have a hard time justifying two motors so similar. Obviously, the cases are different. No one here at YORF would struggle with that. The marketing question is whether that would pose a major hassle for a soccer dad to deal with

Doug



.
__________________
YORF member #11
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 09:04 AM.


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