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  #21  
Old 04-09-2021, 08:32 AM
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Quote:
Originally Posted by barone
Ohhhhh......I like the boost/rocket glider on the box cover

If it's the motor I'm thinking of, it burned about 5 seconds and was only a 7ns motor! Think of our Estes C motors which are around 8.8ns with the thrust drawn out to 5 seconds. That even seems iffy in a glider!
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  #22  
Old 04-09-2021, 12:41 PM
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I'm not sure that is enough power to keep anything over a Guillow's Sleek Streek airborne.
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  #23  
Old 04-09-2021, 01:24 PM
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Originally Posted by ghrocketman
I'm not sure that is enough power to keep anything over a Guillow's Sleek Streek airborne.

That's what I thought when I read it.
https://www.pyroweb.de/raketenmotor...000-10er-schtl/
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  #24  
Old 04-09-2021, 03:22 PM
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Quote:
Originally Posted by tbzep
That's what I thought when I read it.
https://www.pyroweb.de/raketenmotor...000-10er-schtl/

These Held sound like the old Czech rapiers. They were long/low thrust.
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  #25  
Old 04-09-2021, 03:54 PM
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Those would have been less useful than a FSI F7 smoke bomb.
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  #26  
Old 04-09-2021, 04:04 PM
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Quote:
Originally Posted by shockwaveriderz
These Held sound like the old Czech rapiers. They were long/low thrust.


The Rapiers are pretty cool - I have a few of the 18 second burn motors.
They’re used in hand tossed gliders:

https://youtu.be/s-gk5WMylao
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  #27  
Old 04-09-2021, 04:50 PM
TigerHawk TigerHawk is offline
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Quote:
Originally Posted by SEL
The Rapiers are pretty cool - I have a few of the 18 second burn motors.
They’re used in hand tossed gliders:

https://youtu.be/s-gk5WMylao


Cool video. I wonder if those ever had any cato’s as I’d hate to have it happen while holding it or that close to someone’s head/face?
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  #28  
Old 04-09-2021, 08:28 PM
shockwaveriderz shockwaveriderz is offline
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Quote:
Originally Posted by SEL
The Rapiers are pretty cool - I have a few of the 18 second burn motors.
They’re used in hand tossed gliders:

https://youtu.be/s-gk5WMylao



I could do that all day with small hand launched BG. KLIMA said they may consider making these at some future date. It's too bad somebody here in the US would make these. They aren't considered fireworks or model rocket motors here according to the CPSC.

(10) Solid fuel pellets intended for use in miniature jet engines for propelling model jet airplanes, speed boats, racing cars, and similar models, provided such solid fuel pellets:

(i) Weigh not more than 11.5 grams each.

(ii) Are coated with a protective resinous film.

(iii) Contain not more than 35 percent potassium dichromate.

(iv) Produce a maximum thrust of not more than 7 1/2 ounces when used as directed.

(v) Burn not longer than 12 seconds each when used as directed.

I think 7.5 oz is about 2.0 N. The biggest Rapiers had about 1 5 ad much thrust.
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  #29  
Old 04-09-2021, 08:52 PM
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Quote:
Originally Posted by TigerHawk
Cool video. I wonder if those ever had any cato’s as I’d hate to have it happen while holding it or that close to someone’s head/face?



I'm not sure these build up enough pressure to cato.
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  #30  
Old Yesterday, 02:19 AM
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Quote:
Originally Posted by SEL
.. and in the same general area if you look at a map and squint.


Just curious if anyone here has actually flown any of the Adast motors back in the day? Bill Spadafora mounted one in the NAR test stand ( See this link:
< https://forums.rocketshoppe.com/sho...highlight=adast > ) and in the same thread, someone mentioned that these were known as the 'Widow Makers', but I seem to remember it was different motor that earned that dubious moniker, and that the Adast were pretty stable.
Can anyone confirm or deny?


Those are similar to mine, though mine have a gray nozzle, not red. Mine are 2.5ns as well. Jim Kukowski got them as part of an Alfa kit, at the first world championships in Dubnica in 66. I bought the kit at a Cannon auction. Gave the kit to Carl at NARAM-50 (but not before Lee Piester stopped me in the hotel lobby when he saw the kit in my hand), but kept the motors. Carl was going to make a retro-repro kit to support the US FAI team. Never got the kit back from him.

These should be regular black powder motors. From what I've been told, the "Widow makers" are a different size and materials.
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