Water Rocket Parachute Deployment Mechanism

[TheScienceguy1998]

Where did you get the server and the timer?

[gk123434534]

@TheScienceguy1998 We make the timers ourselves, and the servo motors we buy on ebay for a few dollars each.

[sasha06081]

THAT THE BEST ROCKET I EVER MADE!! =D

[nakibeso1]

この動画を参考に、自分の水ロケットの2段目にパラシュートをつ­けることができました。

どうもありがとうございました。

[FLIGHTSIM01124]

@gk123434534 thanks george also can you send me all the names of the things a i need to build it becaus i dont know if a can get´em in my city because im from Mexico and i nedd to see where i can find them

[gk123434534]

@FLIGHTSIM01124 Please send me an email so I can reply to it. I can't post links to items here.

[gk123434534]

@FLIGHTSIM01124 I got your email address from your comment. I'll email you the details. I've also removed your comment with your email address to prevent spammers from getting it.

[FLIGHTSIM01124]

@gk123434534 Hi George, where do i can find a flight computer and a servo motor like the one you use

[gk123434534]

@FLIGHTSIM01124 We don't have any more of these left for sale. If you would like to build your own, I can send you the full details, source code, compiled hex file as well the PCB layout. The RC servo motors we buy on e-bay for a few dollars each.

[fatpeople249er]

Hi gorge this is walker do u think u can use a servo from a rc car for the servo and for the parachute mechanism

[gk123434534]

@fatpeople249er Hi Walker, yes you can use a standard servo motor from an RC car. We use 9g RC servo motors for our deployment mechanisms.

[MrTomcarnahan]

Do you think using epoxy to bind two pieces of 3mm together (90 degree offset) would work? We have a lot of election signs people put up that are made of the 3mm stuff. After the election is over, they are readily available ... for free.

[gk123434534]

@MrTomcarnahan Epoxy won't hold all that well to the Corriflute as it is made from polypropylene. We find contact adhesive works quite well for bonding. If you want to use epoxy, I suggest making lots of small holes on the sides of the corriflute to be bonded. This way the epoxy will be able to grab a hold of the surfaces.

[MrTomcarnahan]

Great video and instructions on your web, George! Another first-rate production.

Question:  what thickness Corriflute sheet did you use? For the deployment module? For your fins?

Thanks as always! -- Tom

[gk123434534]

@MrTomcarnahan Thanks Tom :) We use 5mm Corriflute for both the deployment mechanism as well as fins. We find that the 3mm stuff we have access to just isn't very strong and tends to warp.

[MrJakeFehr]

I like that set-up I think I will build one to for high pressure rockets.

[bobilol24]

i make water rocket but i don't want to spend a lot on it so do you have some mechanic water rocket deployement parachute?

[gk123434534]

@bobilol24 You should be able to use a Tomy timer instead of the servo with this design.

[FruitLoopGroup]

I live in the northern hemisphere so I was wondering if I should I use the left or right side of my ping pong balls?

[gk123434534]

@FruitLoopGroup Oh definitely the right! :)

[FruitLoopGroup]

I live in the northern hemisphere so I was wondering if I should I use the left or right side of my ping pong balls?

[wyz2285]

really nice tutorial! love it :D

but won´t a tomy timer be a lighter and cheaper solution to the servo and the time chip?

[gk123434534]

@wyz2285 Indeed a Tomy timer can be used with this mechanism, and would result in a lighter and cheaper solution. The timer and servo has certain advantages over a Tomy timer though such as a built in launch detect and accurate timing. It can also be connected to a other sensors that detect apogee like the uMAD we fly with the timer.

[wyz2285]

@gk123434534 so did you make the timer chip or you bought it some where?

[gk123434534]

@wyz2285 We make the Servo Timer II (shown here) ourselves. But the design will work with other servo controlling timers or RC servo remote controls.

[wyz2285]

@gk123434534 ok thank you very much, that´s very helpful :)

[wyz2285]

really nice tutorial! love it :D

[thermosinthesis]

Thanks!!!!!!! I gotta tell my aerospace teacher!!

[Basrockets]

Looks like it is not mutch work ! Very nice system

[gk123434534]

@Basrockets Thanks :) It really only takes 1-1.5 hours to make from scratch. Using the contact glue allows you to keep working as it bonds quickly.

[Basrockets]

@gk123434534 Very nice , i'm still working on my big 8,1 Liter water rocket (high pressure) and he is almost done ! and that i go launch it, i can't wait to do that.

Cheers Bastiaan