I had an Echo that I launched on a D20 booster with an E5-6 in the upper stage. The high thrust of the D got the rocket going well and then the long-burn E made for a nice show.
If FSI motors magically reappeared on the market, I think I'd go for the 21mm motors but stay away from the 27mm E and F motors. There are just too many composite motor options out there now that would be less prone to CATOs.
timmwood

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NAR 60014, Level 1, SAM 124

Sounds sweet. I build my Echo I with 18mm mounts. Much more subdued in flight
But you can't beat BP for ease of staging.

Doug

Timm (and 2ahoser),

Here ya go for starters: http://www.semroc.com/Store/Scripts...asp?company=FSI

But then, you probably already knew about that link.


Cheers,

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Jay Goemmer
"Centuri Guy"/"Tau Zero"
YORF Member 28
Semroc SAM #0029
NAR 86131


"I think about organizing things all the time. Never seems to happen. I find something that piques my interest and I'm off on a quest. Or a Centuri. "

--Bill Eichelberger, 02/22/2022


“Centuri fret buzz in an updated form.”
Bill “Wallyum” Eichelberger re: Estes Flutter-By
03 Sept 2014

The Thunderbolt motors were composite propellant motors.

Here are some pictures of the G60 Thunderbolt in my collection.

Bob

Attached Thumbnails

     

And here I thought the Thunderbolts were vaporware

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Don
NAR 53455
"Carpe Diem"

I remember the Thunderbolts from one of the last Pitcons. Someone flew one at that launch.

The F100s (and E60 and D20) were 100% reliable when ignited at the nozzle like conventional BP motors, instead of at the top of the core like a composite. I'd love to see the return of big honken cored BP motors, like FSI or Rocketflite.

That's an awesome motor for your collection! I wonder what the "special purpose" was for these rare motors that was referenced on the label?

.

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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

Going supersonic....

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Dave, NAR # 21853 SR.

Yes, F100s were awesome! I have a 2 stager w/ F100-0 booster and E5-6 sustainer that rocked! Unfortunately, the last time I flew it, I used a modern composite-type ignitor (rather than the old FSI ignitor), and lit the top of the core. There was a "BANG-whooooooooooooooooooooosh" as the F semi-cato'd and lit the sustainer! The rocket recovered normally, but the rear of it was toasted.

As stated earlier, BP motors are easier to stage, and that big honkin' nozzle of the F100 was sooooo cool to look at!

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David Stribling
NAR 18402 SR
But it is rocket science!
Get yer Barrowmans here

Recently tried to fly my FSI OSO kit (newly built, I might add) with the F7-6 as part of the
NAR OOP motor testing program. Used one of my QuickBurst Hot Shot igniter for ignition.
But the F7 catoed immediately on ignition and made a nice, big fireball several feet off the
pad. The OSO was really toasted, burned to a crisp just above the fin can area. I found from
looking through my parts stash that I have a 27 mm tubing that can be used to easily repair
the OSO to look like new again.

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Dave, NAR # 21853 SR.