#31
|
||||
|
||||
Quote:
As I understand it, B14 was drilled separately, but motors blowing on the drill became a problem. The C5 and B8 used a mandrel, but they had problems with the mandrels breaking or wearing down, or cracks developing in the BP around the mandrel. I'm looking at a late model FSI F100 and E60, both made in 1989, and they appear to have been drilled.
__________________
Roy nar12605 |
#32
|
||||
|
||||
Carl,
This is really exciting news. Please put me down as #1 on the reserve list for 5 packs of each motor and ejection charge. And as for the original theme of the thread, if Mark is reading, like Craig I'd love to read an in depth article about how Mabel actually worked. Lee Piester's description at Narcon of Centuri's engine works was also really fascinating, as was Carl's description here. And Carl, I've reconsidered. Make it a case of each. |
#33
|
|||
|
|||
Hello Carl,
I noticed there isn't a port burner listed in the 24mm casing sizes. I know you said the 24mm and 29mm motors would be the last to be produced but I was just curious to see if you thought there might not be enough interest for a high thrust 24mm motor? Since we're bouncing ideas in this new forum, I was thinking along the design lines of a Semroc version of the FSI Mach-1 Dart with a 29mm port burner staged to a 24mm port burner using the LT tubing sizes. Either a slightly larger version using the same FSI fin patterns or a complete make over into a new unique Semroc design. If you thought there would be enough interest I'd be willing to create and submit some designs for your consideration. Just a thought. What do you think? .
__________________
Steve Naquin TRA# 677 L2 NAR# 85518 L2 SAM# 0052 🚀 In Construction: Der Blue Maxx/Minie-Magg 5.5” & Vander-Burn MDRM Clone w/Stickershock23 Custom Decals 🚀 In Paint & Detail: USR Banshee 🚀 In Build Queue: Estes Doorknob w/Vander-Burn Rocketry Upgrade Kit [Sport Decor], Semroc Centurion-F, Semroc Egg Crate 🚀 In Repair: SLS Lil’ Hustler, SLS Aero-Dart 1969 Trim 🚀 Stay Tuned For Fall 2021 Launch Dates Last edited by snaquin : 01-03-2007 at 07:53 PM. |
#34
|
||||
|
||||
One small vote for different colored smoke if feasible. Either boost or delay/tracking.
|
#35
|
||||
|
||||
Quote:
Colored smoke is something we are looking at. Orange has always been my favorite, but it leaves bad stains from the dye. Manufacturability and repeatability is also a problem. Getting the delay correct with a reasonable amount of smoke is our primary design goal. We used hexachlorethane in the 60's which made volumes of smoke, but it was volatile and the delay time decreased with age. We will probably start out with the a more conventional delay.
__________________
Carl McLawhorn NAR#4717 L2 semroc.com |
#36
|
||||
|
||||
Quote:
Unless you've got a way to undercut Estes on price on A8-3, B6-4, and C6-5's I think you should concentrate on motors that are different at first. I'll bet a 13mm B would be popular and if you can get a reliable black powder F or an E that has more power than the E9 there will be dancing in the streets. I think someone has mentioned that the cored B's and C's would fill a void.
__________________
Bill Spadafora http://www.billsplumbing.com billspad@comcast.net bill@billsplumbing.com |
#37
|
||||
|
||||
Quote:
On the other hand, one of the purported psychological barriers of entry in the hobby industry for small rocket kit manufacturers is the lack of a similarly branded line of motors.
__________________
Roy nar12605 |
#38
|
||||
|
||||
Quote:
But I still like the idea of pooling demand from the varied kit vendors to establish a critical mass of demand for new motors. I think the key is for the kit vendors to invent new designs which would use new, unique motors. For example, vendor X develops a kit which needs 1/2A boosters. Semroc private labels for the vendor who in turn promotes both the kit and the motor. The business is done over the web. Getting it onto store shelves would probably take painful amounts of effort But the key is that the motor manufacturing risk is shared with other kit vendors. Doug |
#39
|
||||
|
||||
Quote:
Doesn't the existence of Semroc , Flis and a bunch of smaller manufacturers disprove that?
__________________
Bill Spadafora http://www.billsplumbing.com billspad@comcast.net bill@billsplumbing.com |
#40
|
||||
|
||||
Quote:
The 10-18mm engines will be much earlier than the larger engines. Basically, the larger machine would be capitalized from sales from the smaller machine. We have presented the entire proposed family for input and to see if we have missed any holes before we start the EX procedure.
__________________
Carl McLawhorn NAR#4717 L2 semroc.com |
Thread Tools | Search this Thread |
Display Modes | |
|
|