#21
|
|||
|
|||
Carl, how do you plan to make the core burners?
__________________
Quando Omni Flunkus Moritati |
#22
|
||||
|
||||
Quote:
The largest core burner initially will be the 3/4C19 - 7.5ns. That was the only booster I liked better than the B14.
__________________
Carl McLawhorn NAR#4717 L2 semroc.com |
#23
|
||||
|
||||
Quote:
Carl; Given the process in front of you, about how far away is Semroc from putting the first few on a store shelf somewhere?
__________________
John YORF #003 SAM #004 |
#24
|
|||
|
|||
Hello Carl,
Do you plan to manufacture your own igniter to ship with these? It would seem the 29mm PB would need a special igniter. The 24mm and 29mm would be exciting for two stage rockets based on the LT tubing sizes. The first thing I think of when I see these 24mm and 29mm BP motors in your diagram is staging them. .
__________________
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 |
#25
|
||||
|
||||
Quote:
Seriously, you are involved in the earliest stages and will probably see the whole thing evolve, warts and all.
__________________
Carl McLawhorn NAR#4717 L2 semroc.com |
#26
|
||||
|
||||
Quote:
__________________
Carl McLawhorn NAR#4717 L2 semroc.com |
#27
|
||||
|
||||
Carl,
Concerning those PB (Port Burner, or cored) motors, you said they would need to be drilled. What is the manufacturing problem about using, say, a Teflon-coated mandrel run up through the nozzle during the pressing operation? Couldn't the BP be pressed around the mandrel evenly and completely in a single pass of the ram? Or even have a double-piston, one pressing down from the top, the other pressing the mandrel up from the bottom, to ensure the even distribution of powder?
__________________
Craig McGraw BARCLONE Rocketry -- http://barclone.rocketshoppe.com BARCLONE Blogsite -- http://barclone.wordpress.com BARCLONE Forum -- BARCLONE Forum BARs helping BARs SAM 0044 AMA 352635 |
#28
|
||||
|
||||
Quote:
It is really hard to explain.
__________________
Carl McLawhorn NAR#4717 L2 semroc.com |
#29
|
||||
|
||||
Quote:
So the pressing action is multi-layered? You fill a small amount, press it, fill some more, press that, etc... until you build up the final amount of powder, then perhaps, you give the whole mass one final pressing to reach the desired compression density? That explains why the mandrel approach would be difficult. You would also need a mandrel at each fill and press station, and getting the mandrels aligned correctly each time would be difficult. The drilling process can be done in one pass after the cylinder has been filled and final-pressed. It's a shame the BP couldn't be hard-pressed into pellets separately, then soft-rammed into the cylinder during the final assembly. I know this brings possible deformation and cracking issues into the pellets, leading to grain failures (CATOs). I'm learning as we go along. This was new information to me. Thanks!
__________________
Craig McGraw BARCLONE Rocketry -- http://barclone.rocketshoppe.com BARCLONE Blogsite -- http://barclone.wordpress.com BARCLONE Forum -- BARCLONE Forum BARs helping BARs SAM 0044 AMA 352635 |
#30
|
||||
|
||||
Quote:
Will one of the objectives be then to actually produce a USA-based FAI acceptable competition motor?
__________________
John YORF #003 SAM #004 |
Thread Tools | Search this Thread |
Display Modes | |
|
|