Old School Rocket Car Build

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Re: Old School Rocket Car Build

Post by juicedcoupe »

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.
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Re: Old School Rocket Car Build

Post by Frankentruck »

I thought they were using rocket motors without the parachute ejection charge. Just all 'go' power in the motor.
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Re: Old School Rocket Car Build

Post by coxbros1 »

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
Tap pic for clarity: Derek

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Re: Old School Rocket Car Build

Post by morrisey0 »

coxbros1 wrote: Tue Aug 29, 2023 8:34 pm .
Image
I build RCs like people would have done back in the '90s ..................................... if they had 3D printers.

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Re: Old School Rocket Car Build

Post by coxbros1 »

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!
Tap pic for clarity: Derek

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Re: Old School Rocket Car Build

Post by coxbros1 »

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
20230922_160013.jpg
20230922_160402.jpg
Tap pic for clarity: Derek

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Re: Old School Rocket Car Build

Post by THEYTOOKMYTHUMB »

I think you sent me a dupe that I didn't post and that was it. I'll check. This was today.
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Re: Old School Rocket Car Build

Post by THEYTOOKMYTHUMB »

Another Today.
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Re: Old School Rocket Car Build

Post by THEYTOOKMYTHUMB »

Today.
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Re: Old School Rocket Car Build

Post by coxbros1 »

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
Tap pic for clarity: Derek

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Re: Old School Rocket Car Build

Post by TRX-1-3 »

Dude do they roll over after 100? 114? Just speculating.
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Re: Old School Rocket Car Build

Post by Frankentruck »

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'.
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Re: Old School Rocket Car Build

Post by Dadio »

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?
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Re: Old School Rocket Car Build

Post by THEYTOOKMYTHUMB »

Today.
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Re: Old School Rocket Car Build

Post by 1911Colt »

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

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