Build thread - 24mm supersonic rocket

[rharshberger]

Somewhere on TRF is the story of how Scott Pearce and I came up with the 18mm E45/F55 and 24mm G42 motors.
The whole process was "Mostly Harmless".

In a minimum diameter/minimum mass rocket the E45/F55 could exceed Mach 1.
Our speed trials with these motors did not return usable data.
However, a rocket powered by a 18mm D21 motor was confirmed to pass the Speed of Sound (Mach 1.016).

Were the G110 and G55 part of that fun? I love those two motors and have one of each left, for my Lil' Fusion known as Vanishing Act.

 

[Starz]

Somewhere on TRF is the story of how Scott Pearce and I came up with the 18mm E45/F55 and 24mm G42 motors.
The whole process was "Mostly Harmless".

In a minimum diameter/minimum mass rocket the E45/F55 could exceed Mach 1.
Our speed trials with these motors did not return usable data.
However, a rocket powered by a 18mm D21 motor was confirmed to pass the Speed of Sound (Mach 1.016).

Woah, now that's cool. Anyways, finished my fillets, had to do two layers of Quick & Thick because it shrinks. Will post pictures once I can get my camera to work.

 

[Starz]

Here are some pictures of my fin fillets (you probably can't see them very well) and a full stack. I also finished the payload bay.

 

[grounded-b]

Got 1/4 but sanded down a bit to about 1/32 and it will be papered.

You sanded 1/4" balsa down to 1/32" ?? Why not just start with 1/32" balsa ?

 

[GrouchoDuke]

Fun project - that FlightSketch data will be cool to show off!

 

[Starz]

You sanded 1/4" balsa down to 1/32" ?? Why not just start with 1/32" balsa ?

It was an accident on one fin... then I had to sand all of them down.

 

[Starz]

Ended up flying on some 3Dp fly away rail guides. Sorry for the late launch update lol

 

[Starz]

Thanks @diyaerospace for the help.

 

[lakeroadster]

Thanks @diyaerospace for the help.

A 35 megabyte video.... ugh. That's just crazy huge. ​

 

[Aeva]

A 35 megabyte video.... ugh. That's just crazy huge. ​

I don't want to imagine your internet speed if that's "huge" lol

I took a 10 second 4k HDR video of the solar eclipse a few days ago and that was nearly a whole gigabyte... My last rocket slowmo was something like 620MB, 2minutes of 4k 240fps no-hdr; and a normal 5 second video 4k@30fps is like 45MB for me.

 

[bad_idea]

Ended up flying on some 3Dp fly away rail guides. Sorry for the late launch update lol

Glad to see this flew. Better late than never! Did you collect any data?