Tuesday, April 4, 2017

Water Rockets

A Water Rockets study guide will be published soon, and it will be announced here. 

Several Water Rockets questions have come in recently. Here are the questions and answers.
Q:  A parent asked if we were building rockets with parachutes or "back gliding"/"back sliding" rockets.  I had assumed we would be building parachute rockets similar to last year, but after reading the event description, it doesn't specify other than in the maximum dimensions.  Will we be using parachutes this year?
A:  Yes, similar to last year, parachutes may be used. Q:  I have two teams who are interested in doing water rockets for 3rd and 4th grade. I’m new to this and I'm not sure how to sign them up for their launch time.
A:  There is only one combined team for 3rd and 4th grades for each school.  We will be using SignUp Genius for self-scheduling.  More details will be coming in the next 2 weeks. Q:  Looking at the schedule posted on 3/19, I don't see any times given for the 5th grade water rockets event. Has that been published somewhere?
A:  Schools can sign up for a time slot using SignUp Genius later this month.  Details will be coming in the next two weeks. Q:  I have a question about the dimensions of the rockets, the total height max is 250 cm which seems too tall? And the max width is listed as 30 cm which seems too small if you include the parachute.

A:  250 cm is the maximum length of the rocket with the parachute fully extended.  In other words, if you were to pull the center of the parachute out as far as it goes, the linear distance from the tip of the parachute to the bottom of the bottle or fins (whichever extends further) must not exceed 250 cm.The 30 cm max width is for a fully assembled rocket.  In other words, with the parachute packed and fitted with the nose cone, the rocket, including fins, should be able to pass through a hole 30 cm in diameter.