AT L-1000 DMS – flying case with a nose cone and 4 fins

[ECayemberg]

Yep. Cesaroni only made about 12 for the consumer market. There are still one or two for sale from vendors, for around $3,500 each. Some friends and I tried to figure out what happened with all of them.

Justin is about to lose his marbles talking about O25k's in his L1K thread...

But Charlie O flew one at LDRS30 (2011) in Argonia in a Wac Corporal, Skippy flew one at Balls 22 in 2013, I flew one at MWP12 in 2014.... all three are on Youtube. Of course there are others, but the derail here is real!

 

[rfjustin]

 

[Cameron Anderson]

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Can't remember if you mentioned your fiberglass coupler source earlier...Wildman?

 

[rfjustin]

Can't remember if you mentioned your fiberglass coupler source earlier...Wildman?

Fiberglass fin one, Madcow/Composite Warehouse coupler and cone.

Carbon fin one Wildman coupler and cone.

For the record, Wildman option is better as the coupler diameter is a closer match to the DMS motor.

 

[jd2cylman]

That is some mighty fine work.

 

[Dwatkins]

Yep. Cesaroni only made about 12 for the consumer market. There are still one or two for sale from vendors, for around $3,500 each. Some friends and I tried to figure out what happened with all of them.

 

[firemanup]

Impressive work man!! May make a trip to Argonia to watch

 

[rfjustin]

G10 plates from McMaster Carr arrived as well as the 8020 rails...

 

[watheyak]

Excited to see how you do the tower. I need a 4-fin tower, may copy...

 

[rfjustin]

First we mock-up, then we drill and cut some plates.

 

[grouch]

Towers interest me greatly!

 

[CPUTommy]

As is everything you've done...its super clean and way way off the cool factor charts. I cant wait to see the whole thing..wow just wow !!!

 

[rfjustin]

 

[Nytrunner]

Is that the base, or are you REally counting on your fins flying through those slits on launch?

 

[rfjustin]

Is that the base, or are you REally counting on your fins flying through those slits on launch?

Negative.... the small base (fin guide) is being used for mock-up only.

 

[mo2872]

Is that the base, or are you REally counting on your fins flying through those slits on launch?

Thank you for asking that question.......I was curious, also....... I should clarify, I have ZERO tower experience, and if they were supposed to fly through those slits, I was gonna be AMAZED.

 

[rfjustin]

I'm glad it all makes to me... lol...

 

[Dipstick]

Negative.... the small base (fin guide) is being used for mock-up only.

That and he doesn't want to scratch the nice finish on that motor case

 

[Rocketjunkie]

This is the tower I built for a 4-1/2" minimum diameter rocket in 1990 and 1992. Base was 4' x 4' piece of 3/4 plywood with a piece of 1/32 steel blast deflector. Rails were 2" conduit (cheap at Lowe's). I machined plugs to fit tubes and they were bolted to the base and top piece. Motor was an O3000-40 (yes, motor ejection ) . We didn't know about the issues with BP ejection charges at the time. We also didn't know delay grains burned even slower at altitude. (Delay was more like -55.)

 

[Tim51]

This is the tower I built for a 4-1/2" minimum diameter rocket in 1990 and 1992. Base was 4' x 4' piece of 3/4 plywood with a piece of 1/32 steel blast deflector. Rails were 2" conduit (cheap at Lowe's). I machined plugs to fit tubes and they were bolted to the base and top piece. Motor was an O3000-40 (yes, motor ejection ) . We didn't know about the issues with BP ejection charges at the time. We also didn't know delay grains burned even slower at altitude. (Delay was more like -55.)
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Is that the 'Cloudbuster' rocket referred to in Canepa's 'Large and Dangerous Rocket Ships' ?

 

[rfjustin]

Th

This is the tower I built for a 4-1/2" minimum diameter rocket in 1990 and 1992. Base was 4' x 4' piece of 3/4 plywood with a piece of 1/32 steel blast deflector. Rails were 2" conduit (cheap at Lowe's). I machined plugs to fit tubes and they were bolted to the base and top piece. Motor was an O3000-40 (yes, motor ejection ) . We didn't know about the issues with BP ejection charges at the time. We also didn't know delay grains burned even slower at altitude. (Delay was more like -55.)
View attachment 446307 View attachment 446308

Thanks Tom, we covered it already. Hard to believe that was months ago when it feels like days!

AT L-1000 DMS – flying case with a nose cone and 4 fins

The amount of force on the fins at those speeds is significant. And any misalignment will greatly increase that stress. That stress will be transferred to directly to the motor case, which was never intended to be a structural component. Fins that are adhered directly to the case will add...

www.rocketryforum.com

 

[dnp]

Really been enjoying this thread! I designed and built this tower a few years back, and I've flown many 38/1200 motors out of it with great success. The rails are 1010 extrusion, and the end plates are 1/2" waterjet cut Aluminum, secured by 1/4-20 countersunk bolts. It is fully adjustable from 38-75mm.
.

 

[grouch]

So much awesomeness.

 

[rfjustin]

Wow, those plates are killer! Very nice work!

Really been enjoying this thread! I designed and built this tower a few years back, and I've flown many 38/1200 motors out of it with great success. The rails are 1010 extrusion, and the end plates are 1/2" waterjet cut Aluminum, secured by 1/4-20 countersunk bolts. It is fully adjustable from 38-75mm.
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[boatgeek]

Really been enjoying this thread! I designed and built this tower a few years back, and I've flown many 38/1200 motors out of it with great success. The rails are 1010 extrusion, and the end plates are 1/2" waterjet cut Aluminum, secured by 1/4-20 countersunk bolts. It is fully adjustable from 38-75mm.
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That's a really elegant design. Nice work!

 

[dnp]

Thank you all for the kind feedback! Here's a PDF with a drawing of the plate if anyone is interested in making some for themselves.

 

[Rocketjunkie]

Is that the 'Cloudbuster' rocket referred to in Canepa's 'Large and Dangerous Rocket Ships' ?

Yes. This was the one I flew in 1992. The 1990 flights used the same tower and were powered by Vulcan O1550's.

 

[Tim51]

Yes. This was the one I flew in 1992. The 1990 flights used the same tower and were powered by Vulcan O1550's.

Thanks for being a pioneer!

 

[rfjustin]

Real deal plates get cut this weekend....

 

[rfjustin]

Tower is elegant in its simplicity IMHO, and not bad for DIY at home...