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XLR8 wrote: ↑Sat May 06, 2023 7:01 pm

coxbros1 wrote: ↑Sat May 06, 2023 4:54 pm Next test launch...5:45am Sunday May 7th

Cool!
So, can we assume this launch will be televised like the others??

Dadio is right, the body is developing a certain ... um ... patina.

That yellow body I have and will be on the car in 2 to 3 weeks!

Yes, it will be video'd....the body is really looking classic!

This morning.

Maybe exhaust nozzles are needed to concentrate / direct the motor thrust and keep it on center. There also is the possibility of increasing the motor thrust by accelerating the flow rate.

https://www.grc.nasa.gov/WWW/k-12/rocket/nozzle.html

or maybe not. Looks like they might already have nozzles incorporated.

https://www.grc.nasa.gov/WWW/k-12/rocket/rktengine.html

Frankentruck wrote: ↑Sun May 07, 2023 11:02 am Maybe exhaust nozzles are needed to concentrate / direct the motor thrust and keep it on center. There also is the possibility of increasing the motor thrust by accelerating the flow rate.

https://www.grc.nasa.gov/WWW/k-12/rocket/nozzle.html

or maybe not. Looks like they might already have nozzles incorporated.

https://www.grc.nasa.gov/WWW/k-12/rocket/rktengine.html

Model rocket engines do indeed have nozzles already incorporated.

That thing really looks like a handful out there

RogueIV wrote: ↑Sun May 07, 2023 2:08 pm

Frankentruck wrote: ↑Sun May 07, 2023 11:02 am Maybe exhaust nozzles are needed to concentrate / direct the motor thrust and keep it on center. There also is the possibility of increasing the motor thrust by accelerating the flow rate.

https://www.grc.nasa.gov/WWW/k-12/rocket/nozzle.html

or maybe not. Looks like they might already have nozzles incorporated.

https://www.grc.nasa.gov/WWW/k-12/rocket/rktengine.html

Model rocket engines do indeed have nozzles already incorporated.

That thing really looks like a handful out there

I spent alot of time working on it today...got the timer for the 2nd stage working properly, now I can time the 2nd stage in relation to the burn time on the 1st stage....put some small wings on the body too....can't get more engines till teus so testing won't be till mid week...starting off with 2 Ds to get it running straight again and test the timer...then work my way back up to E and F engines and hopefully get that 100mph goal....it's gonna be harder than I thought

Today.

Two D engines 2 stages with automatic timing system. Worked great. E and D next. Gotta crawl before we walk (fly)

ETA next launch...8hr45m

........

This morning

That's a proper rocket car picture! That is begging for a Batmobile body!

This morning.

Wet road, lost traction when 2nd stage hit...1st stage "E" flawless

Have you tried putting a cinder block behind the car for a little more oomph on launch? I know it's been mentioned but I haven't seen it tried in any of the videos.

Frankentruck wrote: ↑Tue May 09, 2023 12:21 pm Have you tried putting a cinder block behind the car for a little more oomph on launch? I know it's been mentioned but I haven't seen it tried in any of the videos.

Already have too much power at launch I am trying to control...thing has big power...no joke!