Advertisement: What size Sprint kits would you guys want?

[bachsta]

Originally posted by sandman
OK...bachsta has got me thinking...&%&^%% trouble maker!

mwahahaha

 

[sandman]

OK...Don't be so smug!

I just checked...I only have two 29mm models ready to fly anyway...I need another!

 

[bachsta]

sorry

 

[dragonshiprider]

Originally posted by sandman

BTW I still haven't heard from Astronboy...you guys are not clapping!!

Neither have I.As much as I hate to do it I may have to go to Tango Papa.Most of the "custom" stuff I need now has to do with colors as apposed to actual artwork.For instance;Commanche-3 decals in black.Estes Mean Machine in yellow and a few Sprint sets in black.
BTW I was gonna try using Future to help my curling problem with my Commanche decals like you suggested but when i dipped the second one in water it curled up like a salted snail.Oh well! I'd rather have `em in black anyhow.
I just hope that Tango's stuff is as good as Phred's.He's gonna be hard to beat.

 

[sandman]

I'm getting a little concerned about Astronboy...I sent him a PM and it shows that he was online on the 10-07 but...nothing

In the meantime...I did make a few sprint parts that will take a 29mm motor mount.

I haven't cut the motor tube yet but here are the fins, they are ROCK hard balsa almost as hard as basswood! The nose cone which I sealed with fill N Finish while it was still on the lathe. and the tailcone drilled for a 299mm tube.

Main body tube is a Totally Tubular T-60 (BT-60) cut to 16" (15.96"...more or less)

 

[sandman]

oops!

Don't do that very often!

Forgot the pic.

 

[KarlD]

Wow Sandman.

That 29mm pic looks like it would be a model that would just almost "dissappear" upon launch...

Any Sim data available on what that would do?

 

[bachsta]

yah there would be extremely little drag on that kit

 

[sandman]

Here is the RocSim file for the 29mm powered BT-60 sized Sprint.

It doesn't go as high as I would have guessed but still...pretty darn high! 4,600'

I guess if you lose it...it really doesn't matter how high it goes!

I may have the wrong size motor tube in it.

Hey...I'm new at this!

 

[bachsta]

4600 on what motor. i only have the dem version of rocsim so i cant open the file for some reason

 

[sandman]

OK! Let me list out the estimated performance on a 29mm version for ya.

F10-8 (not yet available from Apogee) 4,587'
F20-7 (Econojet motor) 3,639'
G35EJ-7 (Econojet) 3,929'
And if you could find it!

An H90-15 goes 6,342

Keep in mind The H90-15 the Econojet G35-7's delays are way too short for this rocket!
Deployment is about 300' before Apogee and it is moving right along between 60 and 120 ft/sec at deployment...there will be some damage to the rocket with those motors.

A 24mm Estes E9-8 with an adaptor will get it to 1,900'

 

[bachsta]

sweet

 

[wwattles]

And we're supposed to recover this thing HOW???

WW

 

[bachsta]

who said anything about recovering it?

 

[Karl]

Recovery is bleak with a rocket that size touching those alt's!
Karl

 

[KarlD]

It is hard to judge the size of the rocket with the one picture you posted. I have a scale that is similar so I am guessing that the finished length is about 2 to 2.5 feet.

Close?

6000+ feet with that size of rocket?? LOLOLOLOL.

I submit that you change the name from Sprint to.....


3...2...1...Buhh, Bye!


What do you think?

 

[sandman]

Overall length of the 29mm BT-60 version is about 24" nose to tail.

GONE!

OK...maybe I should make something a bit bigger!

 

[KarlD]

IMHO I think you may want to add a spare bulkhead and give the person building it an option for dual deploy.

Somehow the idea if such a high preformer is exciting....

Tim Allen said it best...


"UGH, UGH, MORE POWER!!!!"

 

[bachsta]

that is one amazing rocket. and maybe for the faint of heart (not me) you could make a larger diameter version and a performance version meaning 38mm for those of us that just love to see things really move

 

[wwattles]

I'd like to see performance on par with This Sprint (the Martin Marietta version)

WW

(Maybe balsa nose cones wouldn't work...)

 

[KarlD]

Originally posted by wwattles
I'd like to see performance on par with This Sprint (the Martin Marietta version)

WW

(Maybe balsa nose cones wouldn't work...)

Bet that one has Dual Deploy!

 

[sandman]

I've just been having a ball with RocSim

I modified the BT-56 sized Srint a bit!

With a D12-0 to D12-0 to E9-8 I got 3,427'!!

But...if you could get the E9-0's and it would lift it...

E9-0 to E9-0 to E9-8 gives you.....4,587'!!

And! It's stable!

 

[KarlD]

Wow, a three stage Sprint.

That has got to be a "Blink and you miss it" Launch followed by a smoke trail to oblivion...

I like IT!!

 

[wyldbill]

sandman,

what have you got left? I'm intereseted in a couple...

 

[Karl]

Originally posted by sandman
I've just been having a ball with RocSim

I modified the BT-56 sized Srint a bit!

With a D12-0 to D12-0 to E9-8 I got 3,427'!!

But...if you could get the E9-0's and it would lift it...

E9-0 to E9-0 to E9-8 gives you.....4,587'!!

And! It's stable!

Now your talking my language! A 3stage Sprint , geez! That things gonna' get up there man! Are E9-0's in production though?
Karl

 

[OKTurbo]

"That has got to be a "Blink and you miss it" Launch followed by a smoke trail to oblivion..."

More like...

Whoosh...Pop....whoosh...pop...SEE YA!

 

[sandman]

I don't think the E9-0 ever was in production. You can do the D12 to D12 to E9-8.

Just not enough initial kick as a booster motor.

I do have kits left...if I run out I have parts to make more!

I still have no decal sets or word from Astronboy.

I guess i can send kits out..I will get decals eventually.

I hope!

 

[bachsta]

Originally posted by sandman
I've just been having a ball with RocSim

I modified the BT-56 sized Srint a bit!

With a D12-0 to D12-0 to E9-8 I got 3,427'!!

But...if you could get the E9-0's and it would lift it...

E9-0 to E9-0 to E9-8 gives you.....4,587'!!

And! It's stable!

hmm i wonder how high a 29mm or even a 38mm 3 stage sprint would go...

 

[TheRadiator]

Sandman, what's the availability on the BT50 and BT56 Sized Sprints?

 

[sandman]

BT -50 and BT-56 sizes are ready I'm just waiting on decals but astronboy has contacted me and he'llm hav 'em ready soon