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  #21  
Old 05-12-2005, 01:03 PM
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CPMcGraw CPMcGraw is offline
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Quote:
Originally Posted by A Fish Named Wallyum
This is what I think of when I hear Double D.
http://www.cartoonnetwork.com/tv_shows/eds/
(Heavy sigh.) I remember when it brought other things to mind, but I have kids now.


And I'm thinking about keeping it "G" rated, too. We don't want to completely overload the braincells of the young with such mind-numbing adult themes as this conjures up. They're already having trouble keeping two braincells together with Playstations, X-Boxes, and the like...

Quote:
Originally Posted by Nuke Rocketeer
Kinda like the old WW2 plane nose art


I've seen photos of such artwork from both sides of the war...

English and German artwork was far more tame than American art. More political. American art was more of an "in your face" and "anything goes" attitude. A few pieces of B-17 and B-24 artwork would shock the sensibilities of even today's looser standards...

Let's don't go there...


Craig McGraw
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  #22  
Old 05-12-2005, 01:14 PM
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CPMcGraw CPMcGraw is offline
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Originally Posted by CPMcGraw
...you only need to lengthen the sustainer with a 3" payload section and a balsa nose block...
Craig...


One additional thought...

Even using enlarged fins on the booster, you still need to either add nose weight, or add a payload section of at least 3-5", to achieve the needed stability. The larger fins by themselves did not do the job. Also, it needs to be a payload section, with a nose block, and not just a lengthening of the body. The weight of the nose block adds into the equation. Without this piece, you'd have to lengthen the body yet another inch or two...


Craig McGraw
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  #23  
Old 05-12-2005, 01:17 PM
Eagle3 Eagle3 is offline
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Quote:
Originally Posted by CPMcGraw
One additional thought...

Even using enlarged fins on the booster, you still need to either add nose weight, or add a payload section of at least 3-5", to achieve the needed stability. The larger fins by themselves did not do the job. Also, it needs to be a payload section, with a nose block, and not just a lengthening of the body. The weight of the nose block adds into the equation. Without this piece, you'd have to lengthen the body yet another inch or two...


Craig McGraw


I was thinking of making a booster vision payload section for a Cherokee-DD. That oughta be enough nose weight.
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  #24  
Old 05-12-2005, 01:23 PM
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CPMcGraw CPMcGraw is offline
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Quote:
Originally Posted by Eagle3
I was thinking of making a booster vision payload section for a Cherokee-DD. That oughta be enough nose weight.


Man, THAT would be sweet!

What sort of weight (flying weight, that is...) would you expect from one of those set-ups?


Craig...
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  #25  
Old 05-12-2005, 01:27 PM
Eagle3 Eagle3 is offline
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I'll weight the cam and a 9V battery tonight. It's not going to be a lot. The cam weighs less than the battery IIRC.
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  #26  
Old 05-12-2005, 01:53 PM
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Quote:
Originally Posted by Eagle3
I'll weight the cam and a 9V battery tonight. It's not going to be a lot. The cam weighs less than the battery IIRC.


I've created a 4th RKT file, this time with a 4" payload body and a 1.5 oz mass to simulate the camera package. The simulation still achieves 1950' on a D12-0/D12-7 combination.

Enjoy!


Craig...
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Name:  Cherokee DD[4].jpg
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Size:  49.0 KB  
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File Type: zip CDD with BoosterVision.zip (6.5 KB, 76 views)
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  #27  
Old 05-12-2005, 01:59 PM
Eagle3 Eagle3 is offline
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Quote:
Originally Posted by CPMcGraw
I've created a 4th RKT file, this time with a 4" payload body and a 1.5 oz mass to simulate the camera package. The simulation still achieves 1950' on a D12-0/D12-7 combination.

Enjoy!


Craig...


Awesome! I'm going to grab a CC Express this weekend and get started!
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  #28  
Old 05-12-2005, 02:31 PM
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Quote:
Originally Posted by CPMcGraw
I've created a 4th RKT file, this time with a 4" payload body and a 1.5 oz mass to simulate the camera package. The simulation still achieves 1950' on a D12-0/D12-7 combination.



...And just for the exercise, here's the Cherokee Triple-D!

Would you believe..just under 2600'????

First booster fins are 85% of the second booster fins, while the first booster body is still 3.5" long.

Flight profile uses D12-0/D12-0/D12-7 staging.

Craig "Over the edge" McGraw
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Name:  Cherokee DDD[1].jpg
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File Type: zip Cherokee DDD[1].zip (7.6 KB, 76 views)
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  #29  
Old 05-12-2005, 05:54 PM
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Nuke Rocketeer Nuke Rocketeer is offline
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How about adding three strap-ons using C6-0's to the first stage? That ought to add a few feet in altitude! Hmmmm........Cherokee triple C-triple D. I just may have to build this.
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  #30  
Old 05-12-2005, 06:39 PM
Ltvscout Ltvscout is offline
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Quote:
Originally Posted by CPMcGraw
...And just for the exercise, here's the Cherokee Triple-D!

Would you believe..just under 2600'????

First booster fins are 85% of the second booster fins, while the first booster body is still 3.5" long.

Flight profile uses D12-0/D12-0/D12-7 staging.

Craig "Over the edge" McGraw

Kind of funny how this design is the exact opposite of how Centuri and Estes use to design their multi-stage rockets. There designs always had the booster with the larger fins.
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