Low power electronics deployment.

My latest rocket. It's a low power D plugged to experiment with electronics deployment. I set up the nose cone to be removable so that I can check on the electronics while on the pad. Not much room other places. I have not seen others like it so I thought it good to share.








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Interesting approach! I like the removable nose. A few questions, though: 1) I see three terminals and a single charge well... how are you planning on initiating the charge? Why three wires? 2) What kind of electronics are you running in there? I'd like to see how you have the sled set up, battery, etc. 3) It's difficult to see but do you have the static ports drilled yet? What size did you need?


Later!

--Coop

Hi.

I was thinking starting with single charge in the well. Electronics I am experimenting with is the half oz timer from rocket reviews.

Three posts are enough for two separate charges if I use common ground. Or I could use the U post as a forth. Choices

As for the electronics bay I will rig something up once electronics done.



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Aaah---okay--a common ground makes sense.


Later!

--Coop

Fascinating. That's an awfully small rocket to be packing so much cool stuff into.

Thanks


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Cool design, will definitely be watching this project.

Interesting, can't wait to see your flight results. I took a charge-less approach to smaller rocket DD. See https://www.rocketryforum.com/showthread.php?t=66693.


NAR #91867, L2
Member CMASS, MMMSC, RIMRA, CATO

Which altimeter?

That nose cone looks really heavy. Are you concerned about overstability and weather-cocking?

It's not going high enough to do much weather cocking. And at the moment the nose is quite light. The fins are laser cut plywood which I like for sturdy ness. The weight also helps over stability.


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I realize this is old but took a while to get a flight out of it. I used a Perfectflite altimeter and it did not work. I did not get to the minimum 160ft required, which I knew from the OpenRocket simulation. But did not notice the minimum on Perfectflite until I reread the manual. Going to try with a strait forward timer instead. Lesson learned, the manuals are good and worth reading.

A timer? Why bother? You might as well use ejection delay on the motor... I'd go with a bigger motor...

The picoalt AD-4 is probably one of the smallest DD units out there. https://www.picoalt.com/ Probably pretty pricey for a modroc and a bit difficult to setup. ie. one has to solder a harness. Kurt

Three wires?

Must be a Lucas Electric system.

I hear CTI makes a 24mm G motor.....

qquake2k said:

If it were me, I'd go with a 24mm AP motor. Might as well make the DD worthwhile.

Click to expand...

One of those newfangled Aerotech F44-8 motors might just be perfect. They are just-barely "F" class at 41Ns. A bit more than double the performance of the Estes D12.

If you have room for a longer motor - an F32-8 might be even better.

Next step is a 29mm motor mount and using aerotech composites. Thanks for the variety of good suggestions. Looking to find an inexpensive motor option so that I can practice dual deployment on the cheap. The body is a standard BT80 so I have lots of room.

boomtube-mk2 said:

Three wires?

Must be a Lucas Electric system.

Click to expand...

No actually sneaker than that. I might use a shared ground or use the u bolt as a fourth. Not decided yet.

Coop said:

A timer? Why bother? You might as well use ejection delay on the motor... I'd go with a bigger motor...

Click to expand...

Timers are fun, they also are very simple. I really want to use the half ounce timer (from rocket reviews) but having a few troubles with my components. Got some new ones and it son the list to try out. Two of these together makes dual deployment possible on a very tiny platform. But yes, not necessary, just fun.

If you stick with the 24mm motor tube, just make it long enough to use the AeroTech 24/60 case.
That F35W they make for that case is real nice for rockets such as yours.