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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 |
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#11
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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 |
#12
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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.
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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 ! Last edited by ghrocketman : 09-15-2010 at 09:01 AM. |
#13
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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.
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Enjoy life, it has an expiration date. |
#14
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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.
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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 ! |
#15
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B14-0,3,5,7
C5-0 C11-0 |
#16
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That engine was a piece of crap. 2 out of every 3 catos. |
#17
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I flew about 20 with no catos. YMMV |
#18
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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).
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Roy nar12605 |
#19
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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.
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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 ! |
#20
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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 .
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YORF member #11 |
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