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

[g.pitts]

View attachment 446725

The doggie is not impressed, Justin.

 

[rfjustin]

The doggie is not impressed, Justin.

Ha, true! 18 holes of disc golf in the snow, she was cashed. For that matter so was I, but wanted to see tower together for a dry run.

 

[g.pitts]

Ha, true! 18 holes of disc golf in the snow, she was cashed. For that matter so was I, but wanted to see tower together for a dry run.

In all seriousness, it's really looking good and coming along very nicely. Looking forward to the video of the launch this Spring!

 

[watheyak]

Hey! I have that same basket. That I should use way more than I do...

I'ma steal your tower idea, thanks for sharing!

 

[Theory]

Like it!

I’m a huge fan of “simple!”

 

[rfjustin]

I cut some clam-shell shims for the tower, but will likely not use them. They fit too tight on the motor and its not clear to me how easily they will come off during flight. Neat thought, but probably a solution looking for a problem...

 

[rfjustin]

Simple stuff like recovery cord and getting the Wildman nose tip glued in place.

 

[g.pitts]

View attachment 448179

Just curious... what is the reddish material that was applied to the tip of the nose?

 

[rfjustin]

Just curious... what is the reddish material that was applied to the tip of the nose?

https://www.amazon.com/Bondo-907-Glazing-Spot-Putty/dp/B0002JM8PY

 

[tfish]

Neat thought, but probably a solution looking for a problem...

I use cardboard folded/cupped along the corrugation lines.

Tony

 

[rfjustin]

M1350 to L1000...I dare ya!

That project would start with a robust transition...

 

[Nytrunner]

What do you tack that stuff down with? superglue? 5min epoxy? other?

 

[rfjustin]

What do you tack that stuff down with? superglue? 5min epoxy? other?

Thin CA, then dab on CA accelerator, then rinse/repeat.

 

[rfjustin]

 

[neil_w]

I want a separate subforum just filled with pictures of you making those tailcones.

 

[EeebeeE]

I just hastily put together an OR sim. The airframe diameter is 4mm with 0 wall thickness and this is just my concept from the photos you've shown to this point. Interestingly, the rocket needs a lot of inertia for altitude. My sim shows only about 24K feet at a 3,800' launch altitude AGL ... but it hits Mach 3.45. You really should switch to CF fins. I'm not sure the G10 is going to hold up. When you presss the button, this thing is going to sound like a very loud gunshot.

Here's what I put together. I don't have your fin dimensions, but what is in here seems optimal. You do not want fin height to be less than 1.1x airframe diameter or you may have a serious coning issue. There is 4 oz. of ballast and the electronics, sled bulkheads, etc. are estimated to be 4 oz. Single deploy with a 24" chute and a 20' long Kevlar shock cord.

Feel free to use the OR file if you want. I'd love to see a video of this. Something pulling 55Gs is just a thrill to see.

 

[rocketkyle]

I just hastily put together an OR sim. The airframe diameter is 4mm with 0 wall thickness and this is just my concept from the photos you've shown to this point. Interestingly, the rocket needs a lot of inertia for altitude. My sim shows only about 24K feet at a 3,800' launch altitude AGL ... but it hits Mach 3.45. You really should switch to CF fins. I'm not sure the G10 is going to hold up. When you presss the button, this thing is going to sound like a very loud gunshot.

Here's what I put together. I don't have your fin dimensions, but what is in here seems optimal. You do not want fin height to be less than 1.1x airframe diameter or you may have a serious coning issue. There is 4 oz. of ballast and the electronics, sled bulkheads, etc. are estimated to be 4 oz. Single deploy with a 24" chute and a 20' long Kevlar shock cord.

Feel free to use the OR file if you want. I'd love to see a video of this. Something pulling 55Gs is just a thrill to see.

View attachment 448593

I don't think Justin has asked for unsolicited advice at all in this thread....

that said, ive flown 89G, over mach 3 to 30k' on 1/8" G10 fins multiple times. these fins will be fine.

 

[rfjustin]

I just hastily put together an OR sim. The airframe diameter is 4mm with 0 wall thickness and this is just my concept from the photos you've shown to this point. Interestingly, the rocket needs a lot of inertia for altitude. My sim shows only about 24K feet at a 3,800' launch altitude AGL ... but it hits Mach 3.45. You really should switch to CF fins. I'm not sure the G10 is going to hold up. When you presss the button, this thing is going to sound like a very loud gunshot.

Here's what I put together. I don't have your fin dimensions, but what is in here seems optimal. You do not want fin height to be less than 1.1x airframe diameter or you may have a serious coning issue. There is 4 oz. of ballast and the electronics, sled bulkheads, etc. are estimated to be 4 oz. Single deploy with a 24" chute and a 20' long Kevlar shock cord.

Feel free to use the OR file if you want. I'd love to see a video of this. Something pulling 55Gs is just a thrill to see.

View attachment 448593

I'm all set thanks.

Why would I need to switch to carbon fins when one of two that were built has carbon fins (plus glass fin-to-fin) over that?

 

[rfjustin]

I want a separate subforum just filled with pictures of you making those tailcones.

Ha.... thanks.

 

[rfjustin]

Kloudbusters high altitude application submitted and approved.

 

[watheyak]

Kloudbusters high altitude application submitted and approved.

Airfest?

 

[rfjustin]

Airfest?

Negative... Saturday March 27, 2021, Argonia Cup Competition/KLOUDBurst 29.

Coming up sooner rather than later, 2021 is ripping by thus far...

 

[crossfire]

Jf
Any chance to paint it yet?

 

[ThePlmbr]

Good-luck Justin. May it fly high and straight. And may you recover it, all in one piece. Greg Olson

 

[Theory]

She’s gonna TEAR off that rail boy!!!

going to be one heck of a flight

wishing you all the best. The bird will do fine, just hope you get her back!

 

[Conway Stevens]

Kloudbusters high altitude application submitted and approved.

Awesome to hear Justin. Planning on some good video? Love the oned on your YouTube channel. The Wildman Mach 3 was pretty kick butt. Good luck on the flight.

 

[Walter Longburn]

Do you know what the rocket's on the pad weight is?

 

[Sluggo]

Utterly amazed by your craftsmanship. Incredible. I just had to say so.

 

[rfjustin]

Do you know what the rocket's on the pad weight is?

Both hover right at 6.5 lbs (not including small tracker though).

 

[rfjustin]

Jf
Any chance to paint it yet?

Negative, been too cold. Maybe some primer between now and then, we shall see.