Some help with 'chute selection

[RocketsNorth]

I have just finished a SEMROC Thunder Strike https://www.rocketryforum.com/showthread.php?t=8538 and would like to get it in the air, but I would like some advice on the chute selection. I had thoughts of replacing the 16" plastic chute SEMROC supplied with an 18" Mylar chute because Mylar stays more plyable in cold weather (below freezing) than standard plastic chutes do.
When I opened the SEMROC chute I noticed it is a 4 shroud octagon design. The chute I was planning on replacing it with is a 3 shroud hexagon design. I'm now a little worried that the Mylar chute may not be up to the stress of deployment and decent. Anyone have any thoughts??
Thx

 

[Handeman]

At less then 4 oz. I don't think it will matter if the chute is octagon or hexagon. What is going to make the biggest difference is if you select the correct delay. Getting that right is most of the battle.

 

[kullas]

here is a calc to help ya on the sizing of a chute
https://www.rocketreviews.com/cgi-bin/resources/recoverybox.cgi

and for decent rate
https://www.rocketreviews.com/tool_descent_rate.shtml

 

[RocketsNorth]

At less then 4 oz. I don't think it will matter if the chute is octagon or hexagon. What is going to make the biggest difference is if you select the correct delay. Getting that right is most of the battle.

Thanks

 

[RocketsNorth]

here is a calc to help ya on the sizing of a chute
https://www.rocketreviews.com/cgi-bin/resources/recoverybox.cgi

and for decent rate
https://www.rocketreviews.com/tool_descent_rate.shtml

Awesome, sites thanks very much.

 

[kullas]

anytime glad i could help