Search found 1483 matches

by andrewwski
March 18th, 2020, 12:51 pm
Forum: General Competition
Topic: Replaying Events for 2021
Replies: 228
Views: 17436

Re: Replaying Events for 2021

Yeah... but there's a lot that could be done in quite a few states about bids that wouldn't be too hard. However, SOinc doesn't really care. To put it in different terms, it feels like Nintendo; it does good with its stuff, but doesn't support its users. Hang on there. The entire reason for existen...
by andrewwski
October 25th, 2019, 12:01 am
Forum: Ping Pong Parachute B/C
Topic: Ping Pong Parachute B/C
Replies: 355
Views: 33727

Re: Ping Pong Parachute B/C

Really? That seems really good to me! I've been getting about ~4ish second dropping off from that same height. I know you probably don't want to give much away, but are there any tips/other info you are willing to share? This is a basic tip that applies to all builds, but perfection is key, especia...
by andrewwski
October 13th, 2019, 10:57 pm
Forum: Ping Pong Parachute B/C
Topic: Ping Pong Parachute B/C
Replies: 355
Views: 33727

Re: Ping Pong Parachute B/C

A fairly common method to make a better seal is to heat the PVC over a candle at the point where the neck of the bottle will contact, and then as the pipe softens, push the two ends together to make a slight bulge in the pipe. This bulge helps seal as you push the bottle down against it.
by andrewwski
October 12th, 2019, 10:05 pm
Forum: Ping Pong Parachute B/C
Topic: Air powered launcher
Replies: 4
Views: 1431

Re: Air powered launcher

https://www.nasa.gov/pdf/153405main_Rockets_Water_Rocket_Launcher.pdf These instructions are for a pretty good design. If you can't find the #3 stopper at a hardware store, try a home brewing store. The rest of the parts you can get at Lowe's or Home Depot. I'm partial to it over the PVC and zip-tie...
by andrewwski
October 10th, 2019, 9:51 am
Forum: Ping Pong Parachute B/C
Topic: Ping Pong Parachute B/C
Replies: 355
Views: 33727

Re: Ping Pong Parachute B/C

Well, a FAQ has been posted about the maximum pressure. What's the maximum psi? Due to the variation in the sites where the ping pong parachutes will be held, there can not be one max psi that is published. Teams will be placed in Tier 3 per rule 5.g. if any part of their rocket or parachute hits th...
by andrewwski
October 8th, 2019, 9:01 pm
Forum: Ping Pong Parachute B/C
Topic: Ping Pong Parachute B/C
Replies: 355
Views: 33727

Re: Ping Pong Parachute B/C

Carbonated water seems to be the most cheap, regular water's fine too. Although you probably won't ever get called out for this, the rules specify a carbonated beverage bottle, so a bottle for regular water is technically not allowed. As an ES I'd definitely not let you fly with a regular water bot...
by andrewwski
September 18th, 2019, 10:34 am
Forum: ​W​r​i​g​h​t​ ​S​t​u​f​f​ ​C​
Topic: Wright Stuff C
Replies: 874
Views: 68969

Re: Wright Stuff C

A diagram for Wright Stuff has been posted to the national website. Huh, That's not the approach I would have taken at all. I don't see how that design will do a whole lap the right. I guess the question is whether it is better to have a long flight to the left, and not worry about going right, but...
by andrewwski
September 3rd, 2019, 11:21 pm
Forum: Ping Pong Parachute B/C
Topic: Ping Pong Parachute B/C
Replies: 355
Views: 33727

Re: Ping Pong Parachute B/C

Well 4.b. requires that teams justify their pressure selection using past trials (which should indicate their device can tolerate that pressure), and 5.c. requires the ES to verify they actually pressurized the device to the stated pressure. Also, since hitting the ceiling incurs a large penalty (T...
by andrewwski
September 3rd, 2019, 1:21 pm
Forum: Ping Pong Parachute B/C
Topic: Ping Pong Parachute B/C
Replies: 355
Views: 33727

Re: Ping Pong Parachute B/C

Looks like the rules do not give a maximum allowable pressure? This is going to need to be addressed. Well 4.b. requires that teams justify their pressure selection using past trials (which should indicate their device can tolerate that pressure), and 5.c. requires the ES to verify they actually pr...
by andrewwski
September 3rd, 2019, 11:41 am
Forum: Ping Pong Parachute B/C
Topic: Ping Pong Parachute B/C
Replies: 355
Views: 33727

Re: Ping Pong Parachute B/C

Looks like the rules do not give a maximum allowable pressure? This is going to need to be addressed.

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