Reefing parachutes

This forum is for non-members to ask questions about our competitions. Please check our FAQ page before you ask.
Post Reply
User avatar
retrotec29
WRA2 Member
WRA2 Member
Posts: 62
Joined: Sat Jul 22, 2017 7:46 pm

Reefing parachutes

Post by retrotec29 » Fri Dec 22, 2017 12:48 pm

Due to some interesting geography of my launch site I am forced to get a little creative on recovery. Being in a valley past a certain altitude the recovery becomes less predictable. Reefing the chute so it inflates at a lower altitude seems like a good choice. Reefing uses a ring sliding down the chute lines to delay inflation. Simple in design but kind of complex to master. Ring weight, line friction and chute shape are all factors. As I read the different class rules and follow the forum it appears descent rate has become a fall back in validating some attempts. An exception is class D which only requires a peak altimeter. As we go higher and higher controlling the decent rate may become more of an issue. I just wanted to put it out there for discussion.


No matter where you go, there you are. Buckaroo Banzai

User avatar
WRA2
Site Admin
Site Admin
Posts: 1082
Joined: Sat Dec 30, 2006 11:30 pm

Re: Reefing parachutes

Post by WRA2 » Fri Dec 22, 2017 4:42 pm

Just to clarify in case anyone is wondering. The descent rate applies to the speed at which the recovered rocket touches the ground. Main/drogue, reefing systems or even deploying a parachute at a low altitude on the way down are all acceptable if the speed at touchdown is within the specification.


Lisa Walker,
:WRA2: Forum Administrator. :WRA2:
:WRA2:The Water Rocket Achievement World Record Association :WRA2:

User avatar
retrotec29
WRA2 Member
WRA2 Member
Posts: 62
Joined: Sat Jul 22, 2017 7:46 pm

Re: Reefing parachutes

Post by retrotec29 » Fri Dec 22, 2017 6:57 pm

Cool. Thanks for clarifying.


No matter where you go, there you are. Buckaroo Banzai

Post Reply