L-Class Sugar Motor Launch

[panzuman]

so umm ya totally had to pick up my lower jaw from the floor after that

[normanja02]

that was awesome

[SomeJoker911]

Wow, that was a powerful motor. You say it had two grains, 3.5''wide by 6'' long, with 1 inch core in them. Was the nozzle 1'' as well?

So, your Kn would peak at 114, give you 250lbs of maximum thrust and a pressure of 231 psi.....was that the calculation for you?

And yeah, it is L motor--1047...yeah and the burn time was a good 3 seconds+.

[KaMakeLoa]

Those were the approximate specs we calculated using a program from CP Technologies & actual thrust stand data prior to launch. Another launch is planned for later this year using an high M / low N class sugar motor.

I'll post ground as well as on board flight vid's as soon as available!

Thanx, Rick.

[nakazatoGTR]

sir where can we get that software?

[manvstaco]

how do you position the grains in the tube? are they just long cylinder shaped things mounted side by side in the tube? how long was your pipe? Very nice rocket! how high did it go?

[auburntaco]

I would love to see how you built this.

[alphadeltaforce]

so you used basic rcandy,, how much? what was the size of you motor?! Thanks and fantastic vid!!

[KaMakeLoa]

Thanks! The motor was constructed out of 4" schedule 40 PVC pipe. The grains were 3.5"OD X 6"L with a core of 1.125". There were two (2) grains and a 1" graphite nozzle. Specs showed about 177lbs for 3.5 seconds.

[alphadeltaforce]

sory would you be able so say that a little simpeler! sorry! thanks!

[alphadeltaforce]

4 inch long or wide?

[KaMakeLoa]

4" diameter. The grains were 3.5" diameter X 6" long; 2 grains were used! Hope this helps.

[alphadeltaforce]

yh it does! thanks! I tried using rcandy but it just blew the end corks out and shot the pvc pipe half way across my garden. What do would you advise and what do you use as end plugs? Thanks again,

[KaMakeLoa]

For the bulkhead I use a standard schedule 40 4" dia pipe cap; for the nozzel I used a 4" to 2" reducer, the lower half (where the taper begins down) was filled with Portland cement and a graphite insert around a ~1" dowel rod in the center. Be sure to use heavy duty cement and a "primer!" According to the specs I've found, this combo will handle 250 p.s.i. with a safety factor of 2X.

[alphadeltaforce]

thanks! Perfect! So there is a one inch core,

[KaMakeLoa]

Yup.. 1" dia core..

[alphadeltaforce]

how big do you think the nozzel should be for a 1.5 inch pipe?? thanks

[iRenaatsouvagie]

@KaMakeLoa I know this video is quite old, but question:

I've been building about 30 small (1/4 pound) rockets now using dry KNO3& Sugar, the best one went about 300 feet high. I want to upscale my rockets now, do I have to use molten mixture now? I've made an aluminium rocket case, 2" diameter, about 10" long. Nozzle is stainless steel fitted with 3 small bolts.

[KaMakeLoa]

Hey there Jimmy! Your right! I totally forgot to list our site! DUH!! I will when we get the "M" class off the ground!

[r0ck3tsm0k3]

nonamer moron.

Great flight man, must feel good to make your own motors and have them perform so well!

[KaMakeLoa]

Yeah, there is really no feeling better than doing it all tourself! Even the recovery electronics (R/C airplain receiver to PIC processor) were "homemade." I plan to fly again in Feb~March under an "M" class PVC motor. I'll send in the video from the ground & on board cameras as soon as I can! Thanks for the comment!

[nonamer101]

you could of atleast said what website you got it off... jamesyawnDOTcom.....

[KaMakeLoa]

No website listed because it's a video of MY rocket that I launched.