Smallest Dual Deploy Rocket

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0011001100

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For SSCIJ I got a few Loc 1 series/park flyers. One of them is the Loc Magnum and it has a payload compartment and a coupler so I thought it would be perfect to turn into a dual deploy rocket. Final length of 16" and a diameter of 1" with no external modifications other than the needed vent holes and some tiny screws so it looks pretty much stock.
IMG_20210714_165020.jpg


And here is the altimeter and battery that is housed inside. For switching it on and off I soldered two wires to the switch to allow for twist and tape.
IMG_20210706_214415.jpg


First flight was this past weekend on a C6-5 (tiniest motor I've flown in I think 6 years). Worked perfectly and reached 667ft. For the recovery gear I had a parachute come out at apogee with the motor charge (just in case) and a streamer deploy at 500ft to test that the electronics worked. It did and I will note that for the charge size I simply used the red cap that comes on the matches and filled it about 80% of the way and it seemed a bit energetic. The future for this rocket will be ex 18mm motors and might be able to break mach on a longer motor.
 

neil_w

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Wow, that is a legit competitor to @Leo 's DD Elliptic II. Looks like yours might be shorter, although you're using a relatively cavernous BT50 vs. his BT20. ;)

Nice work!
 

waltr

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Nice.
I have done DD in a 24mm ID BT50 using an Eggtimer Quark.
Used 0.3gram of BP for the change.
 

boomtube-mk2

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It would be possible to construct a dual-deploy rocket using two 18mm BP motors in a single airframe tube.
The motor tubes would run to a point just under the shoulder of the nose cone.
Motor #one would have a short delay, C6-3 and its motor tube would include a streamer-drogue.
Motor #two would have a longer delay C6-5/7 and its motor tube would have the chute, which would deploy 2 to 4 seconds after the streamer.

I was actually going to try this when for me, all things rocketry came to a halt.
 

Kelly

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AltiUno is only single channel... That looks like Alti Duo SMT?
 

Bowman

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First flight was this past weekend on a C6-5 (tiniest motor I've flown in I think 6 years). Worked perfectly and reached 667ft. For the recovery gear I had a parachute come out at apogee with the motor charge (just in case) and a streamer deploy at 500ft to test that the electronics worked. It did and I will note that for the charge size I simply used the red cap that comes on the matches and filled it about 80% of the way and it seemed a bit energetic. The future for this rocket will be ex 18mm motors and might be able to break mach on a longer motor.
That's pretty cool, nice work!
 

mikewrt

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Subscribed. Low power dual deploy is on my to-do list. Would love to see more details!
 

Rocketjunkie

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First flight was this past weekend on a C6-5 (tiniest motor I've flown in I think 6 years). Worked perfectly and reached 667ft. For the recovery gear I had a parachute come out at apogee with the motor charge (just in case) and a streamer deploy at 500ft to test that the electronics worked. It did and I will note that for the charge size I simply used the red cap that comes on the matches and filled it about 80% of the way and it seemed a bit energetic. The future for this rocket will be ex 18mm motors and might be able to break mach on a longer motor.
:cool: altimeters. Need some of these. 18 mm up to full F with 10" of propellant, 3.5 sec burn. Also have core burners with up to 60 N-s, .8 sec burn.
18mm motor 06.jpg 18mm rockets 4.jpg
I also have made 13 mm C20 and D40 motors.
 

cwbullet

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I have a couple I got from him a few weeks ago. They are tiny.
 

0011001100

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Pretty cool, Trevor. I'd like to see it next time you are at MDRA.
Likely won't be back till spring. Possibly going to FAR this fall though ;)


This week got hectic but tomorrow or Sunday I will post more info and can show it all spread out. For those asking, yes this is using a Alti Duo SMT. I plan on flying this on EX 18mm motors that I have made. This is a precursor to a minimum diameter 18mm rocket based on my 18mm 10 grain casing. That motor should be a G330 or so. (For anyone wondering, I'm looking at something north of 200Gs)
 

0011001100

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:cool: altimeters. Need some of these. 18 mm up to full F with 10" of propellant, 3.5 sec burn. Also have core burners with up to 60 N-s, .8 sec burn.
View attachment 483856 View attachment 483854
I also have made 13 mm C20 and D40 motors.
I've been watching your stuff. I'm using 29mm to characterize (can't fit a pressure port on an 18mm bulkhead) and then I will make some 18mm motors.

Nice.
I have done DD in a 24mm ID BT50 using an Eggtimer Quark.
Used 0.3gram of BP for the change.
I think I used about .1-.2 grams a most.
 

0011001100

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Sorry it took so long, school has been demanding.

Anyways here is a picture of the full layout of the rocket. I'd like to swap the shock chord in the top for kevlar and use a better chute but for the proof of concept I used what I had. I can easily swap both them though and improve it. Next flight will likely be end of October and I will use a lower deployment for the chute and do the streamer at apogee. I just have to figure out a time to cast some propellant to do so.
20211007_122632[1].jpg
 

0011001100

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Likely won't be back till spring. Possibly going to FAR this fall though ;)
Also confirmed I am going to FAR assuming the rocket is finished in time. We are making modifications to perform better and be easier to prep for the launch. N1k to 40k+ ft we are hoping for.
 

boomtube-mk2

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If you are going to far, then just stop what you are doing.
It really is that simpl . . . oh, now I get it . . . never mind.
 
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