Challenge! Day to Day 73

MoonMind

Hall of Famer
Dec 29, 2013
Switzerland
Matt
Start Date
Aug 12, 2020
End Date
Aug 12, 2020

Ham radio! Another one of those hobbies that seems to have vanished from the face of the earth (of course, it hasn't).

Also, apart from 73 being a "emirp" of 37 (a prime whose mirror iage is also a prime), both 37 and 73 are star numbers:


1597178753948.png


That's aesthetically pleasing any way you look at it :)

M.
 

tonyturley

Legend
Nov 24, 2014
Scott Depot, WV, USA
Tony
A couple more of the dust-coverd toys hanging around my shop. I built both the USS Enterprise and Mars Lander in my teen years. Both have been launched - once. The flight profiles of both were unimpressive, so I put them on permanent display, and they have somehow managed to survive multiple moves through 38 years of marriage.

 

drd1135

Zen Snapshooter
Jul 13, 2011
Lexington, VA
Steve
A couple more of the dust-coverd toys hanging around my shop. I built both the USS Enterprise and Mars Lander in my teen years. Both have been launched - once. The flight profiles of both were unimpressive, so I put them on permanent display, and they have somehow managed to survive multiple moves through 38 years of marriage.

View attachment 232012
I had that lander. The biggest thing I ever built was the Saturn 1B model from Estes.
.
I converted the engine mount to take a single D engine and not the multiple smaller engines because I could never get that simultaneous ignition thing to work. I was able to fly it once with only repairable damage. 🤓
 

tonyturley

Legend
Nov 24, 2014
Scott Depot, WV, USA
Tony
I had that lander. The biggest thing I ever built was the Saturn 1B model from Estes.
.
I converted the engine mount to take a single D engine and not the multiple smaller engines because I could never get that simultaneous ignition thing to work. I was able to fly it once with only repairable damage. 🤓
I still have the Saturn V gathering dust on a shelf in my basement. I did launch it a few times on "D" clusters. The trick to a cluster is to use a tiny wad of recovery tissue to hold the igniter tightly in the motor nozzle, and make sure your parallel leads are wound tightly and you have a good clean connection and a strong electrical source - meaning something other than alkalines.
 

drd1135

Zen Snapshooter
Jul 13, 2011
Lexington, VA
Steve
I still have the Saturn V gathering dust on a shelf in my basement. I did launch it a few times on "D" clusters. The trick to a cluster is to use a tiny wad of recovery tissue to hold the igniter tightly in the motor nozzle, and make sure your parallel leads are wound tightly and you have a good clean connection and a strong electrical source - meaning something other than alkalines.
We always used a car battery. IIRC, the Mythbusters also struggled mightily with cluster ignition. Of course, I don't remember it being as funny when we tired to do it.
 

Latest threads

Top Bottom