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Astron Sprite plans
I was looking at the plans for the Astron Sprite, and discovered that they are the old plans for the short 18mm engine version. This is the case on both Jimz and Shasta. Does anyone have access to the 13mm version that was used later?
Greg |
#2
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Was this offered as a 13mm version? I though that the advent of the 13mm vs the 18mm shrties was the cause of the death knell for this bird.
But... I have been wrong before... and will be again.... (just ask my wife!) Phred |
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Yup - the Sprite lasted until 1973 - and that catalog lists it has flying with 1/4A3-2T through A3-4T. It is listed that way in the 1972 catalog as well - but listed with the short engines in 1971 and earlier. A well... not like I have the BT and nose cone any way. I think I may do a BT-5 downscale using MicroMaxx engines, tho
Greg |
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Greg, I have my original Sprite from 1967. I made an adapter out of a piece of BT-20 coupler, two centering rings, a piece of BT-5 and an engine block. The Sprite was made using BT-30, which was a little bigger than BT-20 so the coupler slides in the body tube just fine. Bob |
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I cloned the Sprite from a Scout II kit and used the included 13mm adapter, which is about a 1" long BT-5 to BT-20 centering ring (like a thick coupler) holding a BT-5 with engine hook. Yes, the Sprite was listed as a Mini Brute for a while, I believe. It's not in the catalogs, but I recall seeing one on eBay a while back that had the Mini Brute logo on the card. Anyway, I am pretty sure the 13mm plans are exaclty the same as the short 18mm, but say to use the 13mm adapter.
Drew Tomko Last edited by dtomko : 03-15-2005 at 08:41 AM. |
#6
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You can buy a nice 18mm shorty to 13mm adapter from Semroc at www.semroc.com. They sell this with their Fire Fly kit.
__________________
Scott D. Hansen Ye Olde Rocket Shoppe - Your One Stop BAR Shoppe! Ye Olde Rocket Plans - OOP Rocket Plans From 38 Companies! Ye Olde Rocket Forum WOOSH NAR Section #558 |
#7
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Greg, If this isn't a soon-to-be Semroc kit. Doesn't Semroc have these parts for you. Or at least a nose cone that's close. I have built two originals long ago. Still have one. One of my first five kits. After K-27 Honest John, Aerobee 300, Thor Agena-B, and Astron Nighthawk from Estes (from May '69 to early 1970, didn't hold a Centuri kit until fall of 1970). In Centuri went thru Honest John, MX-774, Arcon-Hi (can you tell I like scale models ) , Long Tom, and Mach-10 as my first five . Skyward, Larry Rice -Columbus, OH |
#8
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The MC-717 is the same size as the old Series III Shorty engines. You can glue or friction-fit an Estes "T" mini-engine in the MC-717 to approximate an old Shorty. An engine conversion mount from 13mm to 18mm x 45mm was just too small and fragile to produce. The BNC-30D is close to our BC-714. We have laser-cut fin sets for the Sprite, but they are not online. Ask for one on your next order. Carl |
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Carl, Thanks for the info. I will. Is the nose cone you speak of the same one that's on your Triton ? I have built that Semroc kit. Larry Rice |
#10
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Greg, The plans are the same. The only difference was an adapter, Which Estes also sold separately (I have one). And it only consisted of a rejected engine casing, a self- adhesive strip, and a engine clip. (will look for part number). Upwards, Larry Rice |
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