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  #21  
Old 01-30-2020, 09:36 AM
stefanj stefanj is offline
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I love that Skyhook, LeeR!

* * *

1/4" masking tape is certainly hard to find. Try specialty paint stores.

It's nearing the end of its life, but I bought from American Science & Surplus a huge bag of 1/4" and 1/2" masking tape. It came in lots of nice colors, especially the 1/2" rolls.
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  #22  
Old 01-30-2020, 10:35 AM
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ghrocketman ghrocketman is offline
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I think Sherwin-Williams carries 1/4" masking tape.
Don't expect to pay 98 cents a roll though.
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  #23  
Old 01-30-2020, 11:47 AM
chris m chris m is offline
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Quote:
Originally Posted by Jerry Irvine
Along the line of my motor fit question how are the motor retainers configured? Since Estes motors do not have integrated thrust rings and are flush at both ends, what is the maximum tolerance for a nozzle extension or a delay extension? I am thinking about a new line of motors and I have some ideas to flesh out.


So are you thinking about making motors to sell again . With the US rockets that i have i use z clip or the estes retainer and tape .
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  #24  
Old 01-30-2020, 12:28 PM
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LeeR LeeR is offline
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stefanj and ghrocketman,

Thanks for the compliments on my Super Sky Hook. I remember admiring the Sky Hook when I got my first Estes catalog, a 1964. I built Scouts and Streaks and WAC Corporals, a Drifter, an Aerbee 300 early on, but somehow never built a Sky Hook.

Iíve kind of been focused on nostalgia builds lately. Iíve built a Spaceman (from Semroc), a Super Astron Cobra (built a Ranger as a kid, never did build a Cobra). I built a 24mm booster for a Farside-X, and just recently bought a Semroc Farside-X kit rather than scratch building one to go with the new booster.

When I bought the Estes Panavia, I knew it had to get bashed into something else. After building a Semroc Sky Hook II (moderately upscale Sky Hook), I knew I needed a Super Sky Hook.

I also am completing a huge Super X-Ray a friend started in the 90s, and gave to me last year.

Oh yeah, Iím working on a BMS Mars Snooper as well. Iíve got a very bad case of nostalgia!
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  #25  
Old 01-31-2020, 12:29 PM
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Jerry Irvine Jerry Irvine is offline
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Quote:
Originally Posted by chris m
So are you thinking about making motors to sell again . With the US rockets that i have i use z clip or the estes retainer and tape .

1/4" tape?

Since ceasing selling to the NAR/TRA market, which will continue going forward, I have made thousands of SU and RL motors 24mm, 29mm, 38mm and some larger but not very many.
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  #26  
Old 01-31-2020, 01:04 PM
chris m chris m is offline
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No i take a new roll and with a razor knife i will cut around the circunfance of the roll and just pull one side of it .
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  #27  
Old 02-01-2020, 07:48 AM
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PaulK PaulK is offline
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The Semroc SLS-Arcas should fly nicely on the F15, at least that's what I plan to fly it on when I get around to building it.

The new Estes Pro Series II Doorknob has the F15-6 listed as a recommended motor.

The Estes Mean Machine, modified for 29mm, flies great on the F15 - I flew it a few times before losing the top half.

I have a stash of 1/4" masking tape from a now-closed LHS for thrust rings, works great. I extend the motor tube enough for an outer wrap to hold the motor in place.
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  #28  
Old 02-01-2020, 08:42 AM
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ghrocketman ghrocketman is offline
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I used the HPR instructions for building the Semroc SLS Arcas.
Epoxy heavy-duty construction throughout.
It has flown on as little as an E30-4, but I would never try it on a F15.
The E30 was barely enough.
If you use LPR construction throughout, it may be fine but then you would not be able to use anything decent in it like a G80, G138, or H128.
With LPR construction, I would think about a G40 would be max.
__________________
When in doubt, WHACK the GAS and DITCH the brake !!!
No DIRECT and MEASURABLE Harm=NO Foul advocate

If you are NOT FLYING LOW in the left lane, you need to GET THE #$&@ OUT of it !

Yes, there is such a thing as NORMAL
, if you have to ask, you probably aren't
!
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  #29  
Old 02-01-2020, 10:39 AM
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Chas Russell Chas Russell is offline
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ASP has 1/4" and 1/2" masking tape.

https://www.asp-rocketry.com/ecomme...nt=79&navPanel=

Chas
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  #30  
Old 02-01-2020, 11:07 AM
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Jerry Irvine Jerry Irvine is offline
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Quote:
Originally Posted by Jerry Irvine
Along the line of my motor fit question how are the motor retainers configured? Since Estes motors do not have integrated thrust rings and are flush at both ends, what is the maximum tolerance for a nozzle extension or a delay extension? I am thinking about a new line of motors and I have some ideas to flesh out.
Bump the question and add a news link. So far I have gleaned the specified thrust ring is 1/4" and commercial tape is not readily available so I should include something with the motors. Right? The tentative nozzle extension is 5/8" OD and variable length depending on throat but around 1/2". The tentative delay extension is also 5/8" but I feel it could be comfortably reduced to 1/2" if helpful. These are questions that will lead to a product that is on the market for the next 10-20 years. so these are not stupid questions. YORF hive mind is shockingly valuable. Geeks!!

https://www.oldrocketforum.com/show...479&postcount=6

Just Jerry

Best year ever x10!

Last edited by Jerry Irvine : 02-01-2020 at 11:40 AM.
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