|
|
#11
02-21-2011, 03:19 PM
|
||||
|
||||
Quote:
Look at the picture you posted earlier, do the sides below the capsule seem to taper a bit at the top? Or is that an illusion? Johnathan...just stop it...we're building models here! 
__________________
"I'm a sandman. I've never killed anyone. I terminate runners when their time is up." Logan from "Logan's Run" http://sandmandecals.com/ 
|
|
#12
02-21-2011, 06:21 PM
|
||||
|
||||
|
I think its an illusion, but we are unlikely to know for sure. I've looked at the pictures available on the web including some assembly pictures (If you think the VAB is a rip-off on the outside, the only way to tell the pictures of the insides apart is what kind of rocket is being assembled) and they just don't seem tapered.
I did Bing image searches for "Shenzhou", "CZ-2F" and "taikonaut". You guys tell me what you think.
__________________
NAR 79743 NARTrek Silver I miss being SAM 062 Awaiting First Launch: Too numerous to count Finishing: Zooch Saturn V; Alway/Nau BioArcas; Estes Expedition; TLP Standard Repair/Rescue: Cherokee-D (2); Centuri Nike-Smoke; MX-774 On the Bench: 2650; Dream Stage: 1/39.37 R-7
|
|
#13
02-21-2011, 07:19 PM
|
||||
|
||||
|
Quote:
Well...DUUHHHH! I have one of those Sky Rockets models of the Shenzou! I forgot I had it! It's a lot smaller. The main body is smaller than a BT-50 (0.87"). But it is indeed tapered, well this model is and ya gotta figure since it's made in China it's probably accurate. It measures 0.942" at the top and 1.065" at the base. According to the composite pic I made the model is close...not perfect but close. It needs a LOT of details added but you can do that with an upscale. I could even do a decal upscale from it.
__________________
"I'm a sandman. I've never killed anyone. I terminate runners when their time is up." Logan from "Logan's Run" http://sandmandecals.com/
|
|
#14
02-22-2011, 09:37 AM
|
||||
|
||||
|
I played with the design last night and I came up with a capsule.
The drawing is a pdf. It scales up to 236% of the Sky Rocket's model. [SHENZOU] The only problem using an ST-20 tube is the scaling of the booster tubes. They come out to 1.44" in diameter...nothing matches that size. A BT-56, ST-13 is too small (1.34"). A BT-58 is too big (1.54") But! If you scale it up slightly to a BT-70 (closer to 1/70th scale) the main body the booster tubes are 1.56" . [pdf SHENZOU2] A BT-58 is very very close!
__________________
"I'm a sandman. I've never killed anyone. I terminate runners when their time is up." Logan from "Logan's Run" http://sandmandecals.com/ Last edited by sandman : 02-22-2011 at 09:06 PM.
|
|
#15
02-22-2011, 12:26 PM
|
||||
|
||||
|
Quote:
Did you mean "scale it up slightly to a BT-70 (closer to 1/60th scale)"? Could it be that the Sky kit had to take liberties to use standard tube sizes rendering the boosters not quite scale? Or go with TT-55 from Aerospace Specialty Products with an OD of 1.385? That is the closest commercial tube to 1.44" with the possible exception of 38mm propellant casting tubes which I have not researched and added to my list.. Bill
|
|
#16
02-22-2011, 12:32 PM
|
||||
|
||||
|
Quote:
Yea, I was probably typing too fast. I was making assumptions on the accuracy of the Sky kit. The tubes don't appear to be "standard". I'm not sure where to find the correct dimensions or that they are even available. The main body tube on the Sky kit does seem a bit long compared to the picture of the real one and the boosters seem a bit short.
__________________
"I'm a sandman. I've never killed anyone. I terminate runners when their time is up." Logan from "Logan's Run" http://sandmandecals.com/
|
|
#17
02-22-2011, 12:34 PM
|
||||
|
||||
|
Sadly, 38mm casting tube is too small. But the effort was far from wasted. It turns out that 98mm casting tube is a close approximation to the 3.4" tube I had been seeking!!!
http://www.rocketmotorparts.com/products.html Bill
|
|
#18
02-22-2011, 12:36 PM
|
||||
|
||||
|
Quote:
The best approach may be approximation using a photo as MarkB was doing. Even Peter Alway did that to a small degree on ROTW. At least one of the sounding rockets listed the diameter of a Nike booster as something slightly different than 16.5" Bill
|
|
#19
02-22-2011, 12:36 PM
|
||||
|
||||
|
Quote:
Are you making a big one?
__________________
"I'm a sandman. I've never killed anyone. I terminate runners when their time is up." Logan from "Logan's Run" http://sandmandecals.com/
|
|
#20
02-22-2011, 12:47 PM
|
||||
|
||||
|
Quote:
3.4" comes up is two situations. 10 foot boosters in 1/35 scale (Atlas, Titan) for starters. It is a nice scale to build launch vehicles. The second is that I like to build 1.67 upscales. Centuri ST-20 maps to 3.4" BT-5 0.544" -> 0.908" T-.908" (ST-8) BT-20 0.736" -> 1.229" T-52H (29mm motor mount tube) ST-8 0.908" -> 1.516" T-40 Quest BT-50 0.976" -> 1.630" BT-60 ST-10 1.040" -> 1.737" ??? BT-55 1.325" -> 2.213" BT-70 BT-56 1.346" -> 2.248" T-70H BT-60 1.637" -> 2.734" Semroc LT-275? ST-20 2.042" -> 3.410" Estes Mercury Atlas size BT-70 2.217" -> 3.702" BT-100 Bill
|
 |
| Thread Tools | Search this Thread |
| Display Modes | |
|
|
Linear Mode
