Old School Rocket Car Build

Post by **juicedcoupe** » Tue Aug 29, 2023 7:57 pm

Frankentruck wrote: ↑Tue Aug 29, 2023 7:48 pm What is the smoke puff at the end? Hitting the brakes?

Probably the parachute ejection charge.

Post by **Frankentruck** » Tue Aug 29, 2023 8:07 pm

I thought they were using rocket motors without the parachute ejection charge. Just all 'go' power in the motor.

Post by **coxbros1** » Tue Aug 29, 2023 8:34 pm

Frankentruck wrote: ↑Tue Aug 29, 2023 7:48 pm What is the smoke puff at the end? Hitting the brakes?

Its the ejection charge for the parachute

Post by **morrisey0** » Wed Aug 30, 2023 12:21 am

coxbros1 wrote: ↑Tue Aug 29, 2023 8:34 pm .

Post by **coxbros1** » Wed Aug 30, 2023 8:52 pm

The car went 85mph in 1.7 sec in that video with a small 13lb thrust composite rocket engine....2 days prior I ran a 23lb engine for 1.4 seconds....thing was ballistic but I didn't get a start on my GNSS some didn't get a read....got lots of new engines I will be testing in the near future...stay tuned!

Post by **coxbros1** » Fri Sep 22, 2023 10:25 pm

Building my own engines now...after initial cost for the housing, the reloads are much cheaper...have some runs coming...and several that Thumbs hasn't posted

...but none with this new engine combo....also, I have yet to wreck the car with the Camaro body or custom Factory Works chassis....dozens of runs so far

Post by **THEYTOOKMYTHUMB** » Sat Sep 23, 2023 6:49 pm

I think you sent me a dupe that I didn't post and that was it. I'll check. This was today.

Post by **THEYTOOKMYTHUMB** » Sat Sep 23, 2023 6:49 pm

Another Today.

Post by **THEYTOOKMYTHUMB** » Sun Oct 01, 2023 11:45 pm

Today.

Post by **coxbros1** » Mon Oct 02, 2023 12:57 am

Pretty lil run!...that was 19lbs of thrust and 1.7 sec burn...tommorrow morning doing 22lbs with 2.1 secs...car weighs 2.4lbs...want to know why i cant record speed?...got two meters ....Dynamite and SkyRC gnss...they say 14mph

Post by **TRX-1-3** » Mon Oct 02, 2023 1:21 am

Dude do they roll over after 100? 114? Just speculating.

Post by **Frankentruck** » Mon Oct 02, 2023 1:57 am

So the end of run tumbling... it's like you need a ramp at the end and some James Bond style deployable wings. Just sayin'.

Post by **Dadio** » Mon Oct 02, 2023 6:51 am

coxbros1 wrote: ↑Mon Oct 02, 2023 12:57 am Pretty lil run!...that was 19lbs of thrust and 1.7 sec burn...tommorrow morning doing 22lbs with 2.1 secs...car weighs 2.4lbs...want to know why i cant record speed?...got two meters ....Dynamite and SkyRC gnss...they say 14mph

I wonder if it's the duty cycle or refresh rate of the testers ? Maybe they just don't test frequently enough for that kind of acceleration?

Post by **THEYTOOKMYTHUMB** » Mon Oct 02, 2023 2:08 pm

Today.

Post by **1911Colt** » Mon Oct 02, 2023 4:55 pm

The "braking zone" looks pretty brutal. Is the chassis holding up well?

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Old School Rocket Car Build

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