New scratch build, now "Binary Effusion"

qquake2k · Apr 1, 2014

Okay, this is TopRamen's fault. He started a thread titled, "Anyone Here Have a Dual 29mm Cluster Rocket???" Well, I don't, and that was all it took.

I'm calling this one "Dual Exhaust", because of its 2x29mm cluster. (I'm open to suggestions, if anyone has a better name.) It will be 4" diameter, 86.5in long, will have five 1/4" plywood fins, and a boattail. The nose cone will be a fiberglass conical I ordered from Performance Hobbies. I ordered the LOC components from Discount Hobby Center. I considered turning the nose cone, but a solid basswood cone would be heavier than the fiberglass, and it's over stable as it is. Plus it's difficult to find 4-1/2" square pieces of basswood. I also considered turning the boattail, but decided on a LOC 3.9-3.0 transition instead. The plastic transition will have much thinner walls than a basswood one would, and give me more clearance for the two motor tubes.

View attachment Dual Exhaust_conical2.ork

qquake2k · Apr 1, 2014

I want to use TTW fins with tabs, but figuring out the various tab lengths for the two motor tubes would be impossible for my foggy brain. So I decided to try adding a short length of 3.1" tubing with two centering rings, for the tabs to attach to. I've never done this before, so I'll have to see how or if it works out.

cjp · Apr 1, 2014

When you sent me your idea the other day you got me thinking about my unbuilt Madcow Striker.I thought about building it duel deploy also.Very close in appearance.As far as your duel motor mount,I had the same problem when I built my Gemini Titan with TTW.But I had a smaller body tube to work with.You figured it out,wish I had run it by you first when I built mine.

Cl(VII) · Apr 1, 2014

I'm thinking of starting a thread called "Does anyone here have a 16 fin with pods (8x18mm, 8x24mm) 3x38 central cluster rocket." Just to see what you do.

In all seriousness, I like the looks of that rocket a lot.

qquake2k · Apr 1, 2014

cjp said:
When you sent me your idea the other day you got me thinking about my unbuilt Madcow Striker.I thought about building it duel deploy also.Very close in appearance.As far as your duel motor mount,I had the same problem when I built my Gemini Titan with TTW.But I had a smaller body tube to work with.You figured it out,wish I had run it by you first when I built mine.

I don't know if it'll work, but it's worth a try.

qquake2k · Apr 1, 2014

Cl(VII) said:
I'm thinking of starting a thread called "Does anyone here have a 16 fin with pods (8x18mm, 8x24mm) 3x38 central cluster rocket." Just to see what you do.

In all seriousness, I like the looks of that rocket a lot.

Ha! Not sure I'd rise to THAT challenge! I like the design of this a lot, too. It was mostly an accident. I played around with the shape of the fins in Open Rocket, and increased them to five. I really like the five fins on Death Punch.

SteveA · Apr 1, 2014

I love it! Kinda reminds me of a harpoon or something along that line. Very cool indeed.

TopRamen · Apr 1, 2014

Obviously I too will be following this build to see what you come up with.

rocketgeek101 · Apr 1, 2014

Excellent! Another captain low-n-slow
build! (Love the design BTW.) 'Tis like sitting down for a good movie. Subscribed!!:grin:

Sent from my iPod touch using Rocketry Forum

qquake2k · Apr 1, 2014

SteveA said:
I love it! Kinda reminds me of a harpoon or something along that line. Very cool indeed.

TopRamen said:
Obviously I too will be following this build to see what you come up with.

rocketgeek101 said:
Excellent! Another captain low-n-slow
build! (Love the design BTW.) 'Tis like sitting down for a good movie. Subscribed!!:grin:

I appreciate the compliments, guys, but it's just going to be the same old techniques. Not much new here. But I do agree, it's a cool design.

patelldp · Apr 1, 2014

Think of a name pertaining to car exhausts.

Loudmouth
Flowmaster
Magnaflow
Cat Back

Something like that.

qquake2k · Apr 1, 2014

What do you guys think about "Binary Effusion"? From Merriam-Webster: "(2) : the flow of a gas through an aperture whose diameter is small as compared with the distance between the molecules of the gas"

chris m · Apr 1, 2014

One day I want you to fly all of your rockets !
One , you would be the only one flying
Two , it would be a weekend event .
I like your idea very cool .

o1d_dude · Apr 1, 2014

A stretched version of the "Double Pumper" with 29mm motor tubes, I think. LOL!

cjp · Apr 1, 2014

qquake2k said:
What do you guys think about "Binary Effusion"? From Merriam-Webster: "(2) : the flow of a gas through an aperture whose diameter is small as compared with the distance between the molecules of the gas"

As a certain someone would say,I like it,I like it a lot!

qquake2k · Apr 2, 2014

chris m said:
One day I want you to fly all of your rockets !
One , you would be the only one flying
Two , it would be a weekend event .
I like your idea very cool .

Ha! You're probably right! I must have over 50 rockets, if you include LPR.

o1d_dude said:
A stretched version of the "Double Pumper" with 29mm motor tubes, I think. LOL!

Actually, that was one of my initial ideas, building an upscale Double Pumper. But I decided I wanted something different. An upscale DP would be pretty short, and I've built enough stubbies recently.

cjp said:
As a certain someone would say,I like it,I like it a lot!

Just not sure the LCO could pronounce "Effusion". :tongue:

SteveA · Apr 2, 2014

qquake2k said:
What do you guys think about "Binary Effusion"? From Merriam-Webster: "(2) : the flow of a gas through an aperture whose diameter is small as compared with the distance between the molecules of the gas"

Perfect!

cjp · Apr 3, 2014

qquake2k said:
Ha! You're probably right! I must have over 50 rockets, if you include LPR.

Actually, that was one of my initial ideas, building an upscale Double Pumper. But I decided I wanted something different. An upscale DP would be pretty short, and I've built enough stubbies recently.

Just not sure the LCO could pronounce "Effusion". :tongue:

Why not shorten to the Big E!,For adults only.LOL.

gdjsky01 · Apr 3, 2014

You could call 10 x 00011101

qquake2k · Apr 3, 2014

gdjsky01 said:
You could call 10 x 00011101

I'm guessing that's some sort of binary code...

nute · Apr 3, 2014

qquake2k said:
I'm guessing that's some sort of binary code...

2X29... or so the interweb tells me

gdjsky01 · Apr 4, 2014

Well you brought up the Binary meme.

o1d_dude · Apr 4, 2014

How about from Cheech and Chong's "Big Bambu" when Pedro de Pacas is describing his low rider to The Man (Tommy Chong) and mentions the dual exhaust:

"It's got twice pipes".

Hot rod/low rider slang from the 60's. I was there.

Zeroignite · Apr 4, 2014

...twice pipes. I like it.

qquake2k · Apr 4, 2014

nute said:
2X29... or so the interweb tells me

gdjsky01 said:
You could call 10 x 00011101

Pretty clever!

Cookie the Dog's Owner · Apr 4, 2014

qquake2k said:
I want to use TTW fins with tabs, but figuring out the various tab lengths for the two motor tubes would be impossible for my foggy brain. So I decided to try adding a short length of 3.1" tubing with two centering rings, for the tabs to attach to. I've never done this before, so I'll have to see how or if it works out.

That should work just fine. It's rather an elegant solution.

CRC · Apr 5, 2014

just saw this thread....very cool rocket Captain!!!! I got to say thats good thinking about how to deal with the fin tabs, I might have to use that one day, I've so far not done much with clusters, bu t as my desire for bigger rockets increases I might have to explore clusters more

qquake2k · Apr 6, 2014

CRC said:
just saw this thread....very cool rocket Captain!!!! I got to say thats good thinking about how to deal with the fin tabs, I might have to use that one day, I've so far not done much with clusters, bu t as my desire for bigger rockets increases I might have to explore clusters more

I haven't done anything yet with high power clusters, just a few black powder. But the BP clusters were a lot of fun, so I imagine HP will be even more fun.

qquake2k · Apr 6, 2014

I don't have all the components yet, but I decided to get started on what I could. I'm using 1/4" birch plywood from Michael's for the fins. I cut out the "blanks" with the bandsaw, then as I do with most of my builds, I pinned them together with 1/4" dowels so I could cut and match sand them together.

GDJ · Apr 6, 2014

patelldp said:
Think of a name pertaining to car exhausts.

Loudmouth
Flowmaster
Magnaflow
Cat Back

Something like that.

Add Pacesetter, Hindle to that list.

For obvious reasons, don't name it "Cherry Bomb" please.

New scratch build, now "Binary Effusion"

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