Altimeter 3 jolly logic placement

Hi iam sure there is some threads already but after searching I figured I would just reach out

I was wondering if attaching the altimeter to a 12 inch line of Kevlar string and then connecting it to the nose cone loop would be good for a location
Also I plans to drill 3 vent holes just have to figure the size out for that

plan to use the altimeter for some hpr and mid
Rockets such as the apogee zephyr and Estes V2

thank you
Adam

I’ve generally attached the Alt3 directly to the NC eye bolt using a fishing snap swivel.

Voyager1 said:

I’ve generally attached the Alt3 directly to the NC eye bolt using a fishing snap swivel.

View attachment 400366

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thanks for the info

Voyager1 said:

I’ve generally attached the Alt3 directly to the NC eye bolt using a fishing snap swivel.

View attachment 400366

Click to expand...

Do you make vent holes ? I see most people do 1 to 3 holes

Adam3836 said:

Do you make vent holes ? I see most people do 1 to 3 holes

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Definitely! At least one near the top of the body tube below the NC shoulder. Number (typically odd) and size of holes depending upon the BT diameter.

From a fluid mechanics point of view... you only need one hole to achieve atmospheric pressure within the body of the rocket.

Pull_and_Twist said:

From a fluid mechanics point of view... you only need one hole to achieve atmospheric pressure within the body of the rocket.

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Ah, but with how much (and what kind) of a pressure transient affecting accurate readings!