Aerotech UDDT Question

[tg08]

What's up, I've got another question. I'm about to use the Aerotech UDDT for DMS motors soon, and I was wondering how to take off odd amounts of delay. My motor requires a 7 second delay, from the original 14. So I need to take off 7 seconds, but what would be the best way to do this? I was thinking to buy a 1/32 inch diameter washer, but I can't find one that has the same dimensions as the original that came with the UDDT. If anyone has advice, it would be appreciated.

 

[kswing]

You might be able to find some stiff plastic (maybe from packaging?) that is about the right thickness and cut a washer from that. Also, keep in mind that according to the certification rules ejection delays can vary by up to 20%, so, even if you drill it perfectly it may be off by a second.

 

[2-0turbo]

I made some 1-second spacers from a hotel room key. Right at 1/32” thick. Satisfies the need to set your delay to a 1-sec tolerance for those anal folks (me included).

 

[DigBaddy]

https://www.rocketryforum.com/threa...est-way-to-remove-1-additional-second.184664/

 

[-Slick-Ice]

I only use the RMS but I used this from Thingiverse and printed different delay tools for each delay I use.
https://www.thingiverse.com/thing:3260614

I always lose the washers and forget which end of the tool to use.

 

[3stoogesrocketry]

Back when I flew alot of pro38 motors when they first came out, I got two delay tools and just took 1/32 inch off the tip of the drill so I had one drill for even numbers and one drill for odd numbers

 

[Donnager]

I made some 1-second spacers from a hotel room key. Right at 1/32” thick. Satisfies the need to set your delay to a 1-sec tolerance for those anal folks (me included).

You do mean a Key card, not an actual brass key. Usually the metal ones are thicker (0.065"?).

 

[2-0turbo]

You do mean a Key card, not an actual brass key. Usually the metal ones are thicker (0.065"?).

Yes, the plastic key card. And @DigBaddy posted where I learned about this. Shamelessly stole it and made my own 1-sec spacer.

 

[teepot]

I measured the thickness of the supplied washer and bought some more washers the same thickness from Home Depot.