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-   -   Astron Sprite questions.... (http://www.oldrocketforum.com/showthread.php?t=608)

Thrustline 1 12-16-2005 12:45 PM

Astron Sprite questions....
 
Not sure if this is the correct area to ask this so mods please feel free move OR terminate...

Anyway, I am trying to offer a new parts pack for the Sprite. It's one of the few models I never built when I was a wee lad so I have some questions.

1.) What was the preferred motor and what was the diameter of that motor?

((The reason for the first question is that I am trying to decide whether or not to produce a model that will duplicate the exact version of it or should I leave out the gas vent, weight the nose, provide a streamer and motor mount and provide a flyable option? Which brings us to question number 2...))

2.) I have resurected the Sprite on RocSim8 as best I can and looks like I can convert it ot 13mm and with about .25oz in the nose, it should be a stable flyer that could recover via streamer. Anyone else done something similar?

I want to provide the best possible product I can. Unlike other OOP models, the Sprite is not the most straight forward kit to provide an avenue for a modeler who wants to re-produce her...mostly from the powerplant perspective.


Any addtional feedback would be most welcome!

Thanks,
John

Bob H 12-16-2005 01:15 PM

I still have my 1967 original Sprite.

It was made to fly on 18mm 'S' motors. They were 1.75" long and came in 1/4A, 1/2A, and A impulse only.

In order to fly mine now, I use an adapter cut from a used 18mm motor and put a 13mm motor inside. I think it's kind of cool the way it tumbles down but I don't know if the average person is going to want to make adapters to fly it.

ghrocketman 12-16-2005 02:34 PM

I have an original Astron Sprite that I have flown with a 13mm adapter using 1/4a3's for flying.

I have also made my own "S-series" short engines by cutting an inch off the engine casing of 1/2A6-2's, but this is not exactly NAR safety-code legal :rolleyes:
Whether or NOT this SHOULD be cosidered a safety code violation is a whole other topic.
I think it is silly that removing the plug from A10-PT's to "create" A10-0T's is a violation of the safety code.

If it was me, and I was to make this a kit, I would go with a 13mm mount and leave out the gas vent; make it streamer or 8" chute recovery instead of tumble.
I think tumble recovery, in a word, STINKS !
It is good for getting a VERY beat up looking rocket, very fast !

Tumble recovery should be used for one thing and one thing ONLY; recovery of light boosters on BP powered 2+ stage models. Even that can be iffy....such as with the booster for the Astron Omega, which is quite heavy for a booster.

A Fish Named Wallyum 12-16-2005 03:08 PM

Quote:
Originally Posted by ghrocketman
If it was me, and I was to make this a kit, I would go with a 13mm mount and leave out the gas vent; make it streamer or 8" chute recovery instead of tumble.
I think tumble recovery, in a word, STINKS !
It is good for getting a VERY beat up looking rocket, very fast !


I agree. Just because it WAS done that way is no reason to keep it that way. I've got a Sprite ready for paint that's streamer recovered AND still has the vent hole. I just done trust the Estes ejection charges of late, as I may have mentioned previously. Unless you're talking Mosquitos, tumble recovery blows.

Thrustline 1 12-16-2005 05:03 PM

Quote:
Originally Posted by Bob H
I still have my 1967 original Sprite.

It was made to fly on 18mm 'S' motors. They were 1.75" long and came in 1/4A, 1/2A, and A impulse only.

In order to fly mine now, I use an adapter cut from a used 18mm motor and put a 13mm motor inside. I think it's kind of cool the way it tumbles down but I don't know if the average person is going to want to make adapters to fly it.


Good point. Perhaps the way to offer it is giving the 13mm mmt an optional install.

Thrustline 1 12-16-2005 05:05 PM

Quote:
Originally Posted by A Fish Named Wallyum
I agree. Just because it WAS done that way is no reason to keep it that way. I've got a Sprite ready for paint that's streamer recovered AND still has the vent hole. I just done trust the Estes ejection charges of late, as I may have mentioned previously. Unless you're talking Mosquitos, tumble recovery blows.


Bill...did you have to add any nose weight? (BTW, I shipped your stuff yesterday)

Bob H 12-16-2005 07:34 PM

1 Attachment(s)
Quote:
Originally Posted by ghrocketman
..........I think tumble recovery, in a word, STINKS !
It is good for getting a VERY beat up looking rocket, very fast !........


LOL :D :D My Sprite was the first rocket I ever built and with the finishing skills I had back then, it looked VERY beat up before I ever launched it. ;)

ghrocketman 12-16-2005 07:41 PM

SHEESH !!!
Yechhhhhhhhhhhhhhhh !

I'm not sure I'd own up to one that ugly.... :D

I think I'd at least refinish it to a PRESENTABLE state !

Bob H 12-16-2005 08:27 PM

Quote:
Originally Posted by ghrocketman
SHEESH !!!
Yechhhhhhhhhhhhhhhh !

I'm not sure I'd own up to one that ugly.... :D

I think I'd at least refinish it to a PRESENTABLE state !

Oh, I don't think I will. If I refinished it, it would probably get lost on the next launch. Ugly rockets always seem to come back.

It serves a purpose just like it is. No matter how badly I screw up the finish on a new model, I can always say " At least it isn't as bad that Sprite" :eek:

Doug Sams 12-16-2005 10:45 PM

Quote:
Originally Posted by Bob H
LOL :D :D My Sprite was the first rocket I ever built and with the finishing skills I had back then, it looked VERY beat up before I ever launched it. ;)
Nice Mars Outllander there :) Is the stager in the background the Delta (Camroc lifter)?
Doug


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