Why would one NOT want to place the shear pins as far forward as practical?

jahall4 said:

So assuming the cone does not have a lot of ballast, that would have lots of inertia at drogue deployment, why not use a small piece (or two) of Scotch tape on the outside?

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blackjack2564 said:

I do, although use masking tape.

View attachment 282182 View attachment 282183


A viable option, in many instances....for various reasons.
forgot to drill shear-pin holes
longer than normal motor, holes could not align.
cardboard rockets -retro fit.
extra retention of a non-permanent type, or as you mention above

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blackjack2564 said:

I have only used 1 2-256 pin in 38mm airframes , going against the so -called rules , since the beginning.

1 was all that what needed according to calculations and that's what was implemented.
These are fiberglass with smooth fitting, cones. Not to tight, nor loose.
I see no reason to use 2, & have to increase BP to shear them.
I have 1 paper rocket that I wrapped a strip of glass around the top of tube where shear-pin hole is.
It also functions fine. I have never had any problem with NC's getting stuck or "cocked" in tube.
I am not the only one doing so, several of my flying buddies do the same.

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jahall4 said:

Certainly using CA.

I have seen talk about shear plates, but installing them inside a small a cardboard tube sounds next to impossible since the plates would have to be recessed. Maybe a specially crafted/modified blind nut, thoughts?

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jahall4 said:

Very cool! Thanks for the post! ... and in 2-56 too: https://www.amazon.com/dp/B00XIOO0ZQ/?tag=skimlinks_replacement-20

May still not work very well in small cardboard tube, but they look awesome for fiberglass and larger tubes of any material. Great versatility since you can standardize on the insert, but use metal or nylon bolt depending on what part of the airframe needs to separate.

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