The Flying Disc Golf Basket of Death and Distruction

Short answer, yes

Longer answer: Newton's 2nd law: Force of thrust divided by mass of vehicle -> acceleration of body in m/s^s or ft/s^2
If you want that in "G's" divide a by gravity (9.81 m/s^s or 32.2 ft/s^s)
It's naturally easier to do N/kg so you don't have to pound any slugs.

But....since that turns things into A=F/(m*g) then you can make an assumption and just say A=F/wt since weight of an object is its mass times gravity

Just saw the carnage, er, footage. Still cool!

Sounds like a good use for a barro altimeter. I'd just drop an Eggtimer Quark in there somewhere. Quick and easy, no need to worry about breakwires and such.

Nytrunner said:

Short answer, yes

Longer answer: Newton's 2nd law: Force of thrust divided by mass of vehicle -> acceleration of body in m/s^s or ft/s^2
If you want that in "G's" divide a by gravity (9.81 m/s^s or 32.2 ft/s^s)
It's naturally easier to do N/kg so you don't have to pound any slugs.

But....since that turns things into A=F/(m*g) then you can make an assumption and just say A=F/wt since weight of an object is its mass times gravity

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LOL...yeah I don't know why I didn't think that through better. It's much simpler than I was making it out to be. Thanks.

ttabbal said:

Sounds like a good use for a barro altimeter. I'd just drop an Eggtimer Quark in there somewhere. Quick and easy, no need to worry about breakwires and such.

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How high does a Quark have to go to arm? Also, where do I place an altimeter with sample holes so it can get an accurate reading without dramatically changing the looks? There's chains, spokes and all other assorted nonsense interfering with the airflow that I fear a baro is not going to work out ok. It may or may not. Believe me, I seriously considered this option.

With this timer I can set 2 charges as close as 1/2 a second apart if I want to make sure we get the chute out in time.

It doesn't say, but that's a valid concern. I would certainly ask about it. I don't think all the other features of the rocket would cause problems with the readings. It would be interesting to run both and grab the data from a barro altimeter to see what it might show though.

Accelerometer based is another option, but the minimum altitude/velocity issues would be equally important.

I know you already have a timer and I'm not sure of all its features but I bought a Perfect Flight timer for a pyramid I have been planning for a while. I chose that timer because you can set it to start on motor ignition or motor burn out. The way I see it, set it for a second after burnout would most likely work out fairly well. I have been kicking around the idea of a chute cannon next to the motor tube so that when the pyramid arcs over, the chute will get spit out into the airstream.

grouch said:

I know you already have a timer and I'm not sure of all its features but I bought a Perfect Flight timer for a pyramid I have been planning for a while. I chose that timer because you can set it to start on motor ignition or motor burn out. The way I see it, set it for a second after burnout would most likely work out fairly well. I have been kicking around the idea of a chute cannon next to the motor tube so that when the pyramid arcs over, the chute will get spit out into the airstream.

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I think Sunward made some pyramid kits which were a little tricky to fly. Needed a lot of nose weight and they essentially ejected the motor mount with the chute wrapped around it. Sometimes it came out sometimes not. It was tough to achieve the balance between too tight of a fit and loose enough. A chute cannon is probably a better idea and maybe use some shear pins to prevent the chute from coming out during thrust. The Pet2 can be programmed to time before or after thrust. I like the Pet2 I got - used from the yard sale here on TRF - has DIP switches and I kinda like that better than the idea of trying to program a Pet2+ with the blinking lights and 2 buttons. I think I am going to set my timers to what would have worked in the video. IIRC that was about 2 or 3 seconds.

I shared this with a friend (heavy discgolf competitor) and he loved it

He also sent me this photo of the UAH course's 18th hole

Nytrunner said:

I shared this with a friend (heavy discgolf competitor) and he loved it

He also sent me this photo of the UAH course's 18th hole

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LOL Thanks for sharing this thread with him

That's at UAH? Huh. I usually play as many Huntsville courses as I have time for when I am in Huntsville for the SLI competition and I don't remember that basket at UAH when I played it a few years ago. Now I gotta go play that course again just to see that. Thanks for sharing.

Tell your DG friend I am working hard on a 2.0 version of this basket and fully intend to fly it within the next month or so. Also tell him I'm trying to get a pro or two..or more to come try to hit it with a disc while it's in the air.

And apparently it's made out of the cones of two Little John rounds!

Turns out disc golfers think alike, I will pass along the word!

Wow...Guess I haven't updated this thread in a while. Got a lot of photos and since most of you are rocket folk it should be pretty self explanatory. But if it isn't feel free to ask away. This first photo is really cool because these little triangle parts were made with a laser printer at the local community community college. Set right at 135 degrees these thingies made creating the lower basket octagon MUCH easier.
On the left is the original base plate that supported the lower spokes/basket. The other circles are a little warped and I decided to glue the two together to eliminate the warpage.

So since it is WAY too cold to be doing ejection testing outside I decided to get some indoor work on v 2.0. Got all the chains on tonight and decided to do a putter test:



Probably going to get some of the miles and miles of cat5 cable stripped up and run a length of the pairs between the spokes so the putters don't fall out the bottom like that one did. Why cat5? 'Cause I got a BUNCH of it years ago for free so I might as well use it...

You are having tons of fun! Keep it up

This thread is full of win.

So this happened yesterday:



(sigh)

Best flyin rocket I've seen!! Make sure you post when you get the recovery workin.

Man that thing is cool. Makes me giggle how straight it flies.

Bummer... This is one seriously odd rocket, but in a really good way.

Does the chute eject once on the ground?

I may have missed it... what motor are you using.

Well, the up part was cool...

I'm sure its just a scratch..........

Actually, the damage while extensive is very repairable. It will take some time but it isn't nearly as bad as the first time. When I walked up to the rocket the timer was still beeping 3 beeps as if it were still awaiting launch. So either I didn't set the dip switched correctly (doubtful) or it didn't detect launch because either the G switch is faulty or it didn't pull enuogh g's. I think it didn't pull enough g's. Next time I will have to go with a burn/pull wire to activate it.

It was a good learning experience though. The I140 certainly proved to be the right motor for this configuration. Also having the video is going to invaluable to setting the timer on the next flight.

-Dave

DAllen said:

Actually, the damage while extensive is very repairable. It will take some time but it isn't nearly as bad as the first time. When I walked up to the rocket the timer was still beeping 3 beeps as if it were still awaiting launch. So either I didn't set the dip switched correctly (doubtful) or it didn't detect launch because either the G switch is faulty or it didn't pull enuogh g's. I think it didn't pull enough g's. Next time I will have to go with a burn/pull wire to activate it.

It was a good learning experience though. The I140 certainly proved to be the right motor for this configuration. Also having the video is going to invaluable to setting the timer on the next flight.

-Dave

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If you're like me, you'll do it better the second time.

Bat-mite said:

If you're like me, you'll do it better the second time.

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Um...well...that was the second time.



Third times a charm?

Maybe you should consider renaming it? Just a thought....

Wayco said:

Maybe you should consider renaming it? Just a thought....

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Why? It's funny.

Wayco said:

It is funny, but since you have destroyed it twice, and used "Distruction" (sp) in it's name, maybe it thinks that's what it's supposed to do.

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Thats why we don't bring up the name in front of the rocket. Sheez.

At the moment it thinks its name is Fred.

Soooo I flew it at LDRS and ... It worked! Came down pretty hard and knocked off the bottom ring but I do not care. Since this project has gotten so much positive reaction from both the rocketry and disc golf communities I am going to completely rebuild it with lessons learned from this project. Starting with it's core and making that out of 38mm fiberglass tubing and then figuring out a way to separate it into pieces to make it easier to transport. This current iteration is rather janky in construction and a real PITA to fit in a car. The rear plywood plate is starting to delaminate and I just don't have it in me to rebuild it AGAIN. Anyways here are some vids I have of it so far:

I found a better video!



If anyone has photos or videos of this flight PLEASE send them to me! Or post them some where I can see them! Pretty please!

That's great! I love it! Third time is the charm!