Vent Holes on Nose Cone?

Hello,
Does anybody have a formula for vent hole sizes on a nose cone? Also, where should they go? I have been searching the forums and google fruitlessly, and wanted to know Y'all's opinion.


Thanks
Matt

I have used nosecone vents a lot. Typically I will just use the volume of a cone to approximate the inside area of the nosecone (or part of the nosecone depending on where your bulkhead is located). I put the vent hole near the bottom of the bulkhead location or the nosecone aft, again depending on your application. I typically will use one or two holes I will tilt them so the transition through the wall is facing downward somewhat. I have never had problem measuring altitude and doing events when implemented in this manner (although my apogee event is typically set up to use an accel trigger).

Would it be OK on an RRC3?

I have not used an RRC3 in this application, although I have used a soon-to-be-announced variant of the RRC3 in this application and it worked fine. I have found Missileworks products to be very tolerant to almost any install / configuration.

One of the RRC3 beta testers mounted his in a nosecone, and it performed well.

I do not know the specifics of how he built/vented, and I have zero experience doing this myself.

-Kevin

Apogee has a news letter that may help #329

https://www.apogeerockets.com/education/downloads/Newsletter329.pdf

michigander said:

Apogee has a news letter that may help #329

https://www.apogeerockets.com/education/downloads/Newsletter329.pdf

Click to expand...

Thanks for posting this. As always an excellent article by Apogee.