Ye Olde Rocket Forum

Go Back   Ye Olde Rocket Forum > Work Bench > Projects
User Name
Password
Auctions Register FAQ Members List Calendar Today's Posts Search Mark Forums Read


Reply
 
Thread Tools Search this Thread Display Modes
  #11  
Old 08-17-2018, 01:50 PM
A Fish Named Wallyum A Fish Named Wallyum is offline
BP Mafia
 
Join Date: Mar 2005
Location: Ft. Thomas, KY
Posts: 8,592
Default

Quote:
Originally Posted by Rocketflyer
Bill, you did an outstanding job on that build.

Thank you. I like it, but up close it shows my normal lack of attention to detail. The balsa grain is pretty evident, but the on-pad pics should be good enough, especially for my non-exacting standards.
__________________
Bill Eichelberger
NAR 79563

http://wallyum.blogspot.com/

I miss being SAM 0058

Build floor: Centuri Design Contest F-150 Hurricane Estes - Low Boom SST Semroc - Gee'Hod, Shrike, SST Shuttle

In paint: Canaroc Starfighter Scorpion Estes F-22 Air Superiority Fighter, Solar Sailer II Semroc Cyber III

Ready to fly: Estes - Multi-Roc, Solar Sailer II Semroc - Earmark, Snake Jumper
Reply With Quote
  #12  
Old 08-17-2018, 08:26 PM
tbzep's Avatar
tbzep tbzep is offline
Dazed and Confused
 
Join Date: Mar 2005
Location: TN
Posts: 11,604
Default

Quote:
Originally Posted by A Fish Named Wallyum
Thank you. I like it, but up close it shows my normal lack of attention to detail. The balsa grain is pretty evident, but the on-pad pics should be good enough, especially for my non-exacting standards.


Yeah, you're trying to play down the finish quality to disguise the real question that remains... Where's the launch lug?



.
__________________
I love sanding.
Reply With Quote
  #13  
Old 01-09-2019, 05:13 AM
blackshire's Avatar
blackshire blackshire is offline
Master Modeler
 
Join Date: Jan 2009
Location: Fairbanks, Alaska
Posts: 6,507
Default

Quote:
Originally Posted by A Fish Named Wallyum
Yup. Faked the hell out of it. I think I'm pretty close.
Thank you for rescuing this old Bo-Mar kit (and Bo-Mar itself) from oblivion; that's a pretty model, that's painted up like a model rocket *should* be, with a White Sands-type checkerboard roll pattern! I hope the weather cooperates with you at Muncie this time, and I'm sure your up-scaled Bo-Mar Spartan will attract a lot of admiring attention ("Is that a scratch-build?" ["Well, Bo-Mar kind of directed my scratches..."] "Bo-Who?!" :-) )--and speaking of 'directed scratches' regarding replicating obscure old kits:

A useful name for this type of model reproduction that you've done here, where you only have incomplete data to go on, might be "Forensic Scale," because it is similar to the other forensic arts (see: http://en.wikipedia.org/wiki/Forensic_arts ). While the term "forensic" is usually associated with police work (where a police department sketch artist or sculptor [both can use computer techniques and/or the original manual ones] creates a portrait or sculpture of a subject from witnesses' descriptions), these techniques are also used in other fields, such as art reconstruction, anthropology, archaeology, etc. Also:

A few plastic model kits have been Forensic Scale, too (one example is the Testors 1:48 scale Area 51 UFO kit, which was designed based on verbal description or descriptions). A working definition of Forensic Scale model rockets might be:
************************************
A Forensic Scale model rocket is a replica of a full-scale rocket or spacecraft (or of a proposed, cancelled, or existing but yet-to-be-flown vehicle of either type, or a fictional vehicle of either type), or a replica of a non-scale, Scale, Sport Scale, or semi-scale model rocket kit of the past, whose design requires the builder to utilize forensic art techniques due to having only incomplete data to use.

These forensic techniques can include reconstructing fin patterns, other parts (including body tube lengths), and decor schemes from published and/or unpublished, partly-dimensioned and/or un-dimensioned drawings, illustrations, sketches, and/or photographs of the original vehicles or models, as well as printed and/or verbal descriptions from the original vehicles' or models' manufacturers, as well as from others who built or owned examples of the original vehicles or models.
************************************
I hope this information will be helpful.
__________________
Black Shire--Draft horse in human form, model rocketeer, occasional mystic, and writer, see:
http://www.lulu.com/content/paperba...an-form/8075185
http://www.lulu.com/product/cd/what...of-2%29/6122050
http://www.lulu.com/product/cd/what...of-2%29/6126511
All of my book proceeds go to the Northcote Heavy Horse Centre www.northcotehorses.com.
NAR #54895 SR
Reply With Quote
  #14  
Old 01-09-2019, 06:23 AM
blackshire's Avatar
blackshire blackshire is offline
Master Modeler
 
Join Date: Jan 2009
Location: Fairbanks, Alaska
Posts: 6,507
Default

Quote:
Originally Posted by astronwolf
Well it looks pretty good to me. I noticed that Bomar offered a very limited selection of parts, and if they used only those parts to make their kits, getting accurate dimensional data would be easy. It looks like almost their whole 1969 lineup was based on 9-inches of BT-20 and the same hardwood nose cone!
I had thought that Bo-Mar used BT-20 as well, but apparently not. Their 1969 catalog (on the Ninfinger Productions website, see: http://www.ninfinger.org/rockets/ca.../69bomar14.html ) shows that their body tubes called BBT-1 and BBT-2 (9" and 18" long, respectively) were 0.715" I.D. and 0.755" O.D., which is larger than BT-20 (0.736" O.D.) and just a smidgen narrower than BT-30 (0.763" O.D.)--with that tiny (just 0.008" [0.004" on each side]) difference in diameter, BT-30 could be substituted for the Bo-Mar BBT-1/BBT-2 body tubes. Also:

This information, along with catalog descriptions of the kits, enables forensic reconstruction of them. For example, Bo-Mar's Phoenix kit (see: http://www.ninfinger.org/rockets/ca...9/69bomar8.html ) was described as being "21 inches long" in bullet points at the top of its page. Its hardwood nose cone (which was mentioned in the kit description) was 3.25" long, as the catalog showed (see: http://www.ninfinger.org/rockets/ca.../69bomar14.html ). The BBT-2 body tube--also listed on that page--was 18" long, and 18" + 3.25" = 21.25", which they probably rounded off to the "21 inches long" bullet point on the Phoenix's catalog page, and:

The drawing of the Phoenix on its citation page, plus the "group portrait" photograph of all of the Bo-Mar model rockets (in built & finished form) on the back page of the catalog (see: http://www.ninfinger.org/rockets/ca...9/69bomarb.html ), would enable forensic reconstruction of the Phoenix's fin pattern, its nose cone if needed (it was a ~4.3:1 tangent ogive), and also its "official" decor scheme. (While the picture is black-and-white, the stark contrasts between the "white" body tube and the "black" nose cone, fins, and the portion of the rear body tube that's between the fins could be matched by several colors--white and black, or yellow and black [or white or yellow, perhaps with a red or blue nose cone, fins, and rear body tube]--it's possible that no particular colors were specified, and that only the paint scheme contrasts themselves were suggested in the kit instructions.)

I hope this information will be helpful.
__________________
Black Shire--Draft horse in human form, model rocketeer, occasional mystic, and writer, see:
http://www.lulu.com/content/paperba...an-form/8075185
http://www.lulu.com/product/cd/what...of-2%29/6122050
http://www.lulu.com/product/cd/what...of-2%29/6126511
All of my book proceeds go to the Northcote Heavy Horse Centre www.northcotehorses.com.
NAR #54895 SR
Reply With Quote
  #15  
Old 01-09-2019, 11:57 AM
BARGeezer BARGeezer is offline
Avid Builder
 
Join Date: Nov 2017
Posts: 610
Default

A Centuri (Semroc) ST-7 tube would be a nearly identical match to the Bo-Mar tubes at .715 ID and .759 OD.
Reply With Quote
  #16  
Old 01-09-2019, 12:35 PM
blackshire's Avatar
blackshire blackshire is offline
Master Modeler
 
Join Date: Jan 2009
Location: Fairbanks, Alaska
Posts: 6,507
Default

Quote:
Originally Posted by BARGeezer
A Centuri (Semroc) ST-7 tube would be a nearly identical match to the Bo-Mar tubes at .715 ID and .759 OD.
You're right--and ST-7 is an even closer match; their inside diameters are identical, and their outside diameters differ by only 0.004" (just 0.002" on each side), which is a difference not even worth mentioning! Also, I wouldn't be surprised if Semroc has a 3.25" long tangent ogive ST-7 size nose cone--or at least one quite close to that length.
__________________
Black Shire--Draft horse in human form, model rocketeer, occasional mystic, and writer, see:
http://www.lulu.com/content/paperba...an-form/8075185
http://www.lulu.com/product/cd/what...of-2%29/6122050
http://www.lulu.com/product/cd/what...of-2%29/6126511
All of my book proceeds go to the Northcote Heavy Horse Centre www.northcotehorses.com.
NAR #54895 SR
Reply With Quote
  #17  
Old 01-09-2019, 12:43 PM
LeeR's Avatar
LeeR LeeR is offline
Retired with Way Too Many Kits
 
Join Date: Jun 2007
Location: Colorado
Posts: 3,221
Default

Very nice. May it be found in the corn fields, to fly a second time ...

__________________
Lee Reep
NAR 55948

Projects: Semroc Saturn 1B, Ken Foss Designs Mini Satellite Interceptor
In the Paint Shop: Nothing! Too cold!
Launch-Ready: Farside-X, Maxi Honest John, Super Scamp
Reply With Quote
  #18  
Old 01-09-2019, 12:55 PM
blackshire's Avatar
blackshire blackshire is offline
Master Modeler
 
Join Date: Jan 2009
Location: Fairbanks, Alaska
Posts: 6,507
Default

Quote:
Originally Posted by LeeR
Very nice. May it be found in the corn fields, to fly a second time ...

That sounds like a troubling "Twilight Zone" episode that involved a cornfield... :-)
__________________
Black Shire--Draft horse in human form, model rocketeer, occasional mystic, and writer, see:
http://www.lulu.com/content/paperba...an-form/8075185
http://www.lulu.com/product/cd/what...of-2%29/6122050
http://www.lulu.com/product/cd/what...of-2%29/6126511
All of my book proceeds go to the Northcote Heavy Horse Centre www.northcotehorses.com.
NAR #54895 SR
Reply With Quote
  #19  
Old 01-09-2019, 03:16 PM
BARGeezer BARGeezer is offline
Avid Builder
 
Join Date: Nov 2017
Posts: 610
Default

Quote:
Originally Posted by blackshire
That sounds like a troubling "Twilight Zone" episode that involved a cornfield... :-)

And Billy Mumy.
BTW here's a nose cone that's the closest I could find to the BoMar one:
http://www.erockets.biz/semroc-bals...ne-7-3-3-ogive/
With that and the ST-7 tube ( and some "eye-sim" ) should be able to clone all seven of their kits.
Reply With Quote
  #20  
Old 01-10-2019, 10:24 AM
A Fish Named Wallyum A Fish Named Wallyum is offline
BP Mafia
 
Join Date: Mar 2005
Location: Ft. Thomas, KY
Posts: 8,592
Default

Quote:
Originally Posted by LeeR
Very nice. May it be found in the corn fields, to fly a second time ...


That was August or September. The next thing to find it will be a mower come spring.
__________________
Bill Eichelberger
NAR 79563

http://wallyum.blogspot.com/

I miss being SAM 0058

Build floor: Centuri Design Contest F-150 Hurricane Estes - Low Boom SST Semroc - Gee'Hod, Shrike, SST Shuttle

In paint: Canaroc Starfighter Scorpion Estes F-22 Air Superiority Fighter, Solar Sailer II Semroc Cyber III

Ready to fly: Estes - Multi-Roc, Solar Sailer II Semroc - Earmark, Snake Jumper
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump



All times are GMT -5. The time now is 02:42 AM.


Powered by: vBulletin Version 3.0.7
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Ye Olde Rocket Shoppe © 1998-2024