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  #21  
Old 02-28-2014, 10:59 PM
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mikeyd mikeyd is offline
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Quote:
Originally Posted by Shreadvector
Plastic model unprotected by internal body tube will melt from ejection charge and delay afterburn (which looks like a highway flare flame coming out of the top of the motor after the ejection charge has fired).


I Might be able to survive this, as I said I would paint the inside of the rocket body with epoxy, but I could also leave about 2 in of 20mm tube above the motor mount, and put a baffle in it, not a big one, but basically two, or even three, just over half moon heavy cardstock "plugs" just opposite each other about 1/4 in apart in the 20mm tube.
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  #22  
Old 03-01-2014, 07:14 AM
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Looks like Quest is out of the 20mm tubes. Any other sources?
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  #23  
Old 03-01-2014, 07:37 AM
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Brent, looks like Balsa Machining has it, as the T20Q-34 MPC/Quest T20. Make sure not to use their standard T20 as that is the Estes bt20, per their website.

How much do you need, I have one 24in length left, and could give you some of it.

On a side note, did you receive your Vostok, and Titan? If so, and you plan on opening them, I am curious if the Titan included the plastic parts for flight conversion as well, such as the clear plastic fins.

The other thing on my Vostok, as I plan to make it a flying model only, I will probably glue in the motor mount and base plate instead of allowing it to interchange with the static base. I am also contemplating painting it all green, with no white "frost". This would mean no need for the vostok space craft inside the nose, as I would end up painting the clear plastic as well.
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  #24  
Old 03-01-2014, 08:44 AM
Brent Brent is offline
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I received them yesterday. I just opened the Titan. I don't see any clear fins just looking at the parts. It looks like there may be some molded launch lugs though. Are the original Titan instructions on the net anywhere? I am on night shift so it is time for bed for me LOL. I will take another look later.
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  #25  
Old 03-02-2014, 11:12 AM
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hcmbanjo hcmbanjo is offline
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Quote:
Originally Posted by Brent
I received them yesterday. I just opened the Titan. I don't see any clear fins just looking at the parts. It looks like there may be some molded launch lugs though. Are the original Titan instructions on the net anywhere? I am on night shift so it is time for bed for me LOL. I will take another look later.


Ninfinger has the plans:
http://www.ninfinger.org/models/kitplans/mpc9002.pdf
There are plenty of clear sheets at hobbylinc:
http://www.hobbylinc.com/cgi-bin/s8...stic+sheet&ss=1
I don't know what glues would work with each though.

If you can, post pictures of the build.
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  #26  
Old 03-02-2014, 11:18 AM
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hcmbanjo hcmbanjo is offline
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Quote:
Originally Posted by mikeyd
Brent, looks like Balsa Machining has it, as the T20Q-34 MPC/Quest T20. Make sure not to use their standard T20 as that is the Estes bt20, per their website.

The other thing on my Vostok, as I plan to make it a flying model only, I will probably glue in the motor mount and base plate instead of allowing it to interchange with the static base. I am also contemplating painting it all green, with no white "frost". This would mean no need for the vostok space craft inside the nose, as I would end up painting the clear plastic as well.


I was surprised Quest was out of the tubing.
BMS will set you up with tubes.

I glued the Vostok capsule pieces inside the nose halves - along with the lead weight.
(I'm building the original MPC kit, not the reissue)
The lead weight weighed in at .18 oz.
You should add the equivalent clay (or whatever you prefer) weight to the nose.
If you don't glue in all the detail pieces inside the two nose halves, you should add their weight in addition to the .18 oz.
I have a feeling this one needs the nose weight.
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  #27  
Old 03-02-2014, 12:07 PM
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Quote:
Originally Posted by hcmbanjo
I was surprised Quest was out of the tubing.
BMS will set you up with tubes.

I glued the Vostok capsule pieces inside the nose halves - along with the lead weight.
(I'm building the original MPC kit, not the reissue)
The lead weight weighed in at .18 oz.
You should add the equivalent clay (or whatever you prefer) weight to the nose.
If you don't glue in all the detail pieces inside the two nose halves, you should add their weight in addition to the .18 oz.
I have a feeling this one needs the nose weight.


How do you think a C6 would do in this bird? I have a couple of the originals that I had intended on building at least one, but not sure how a standard C6-3 will fair with one of these. I don't recall off hand what the flight-ready weight would be.

Seems Fred mentioned that the never-issued MPC C9 was supposed to have been for these two plastic kits. I never knew anyone who had one of these kits back in the day or reports of flights on other motors.

Earl
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  #28  
Old 03-02-2014, 12:46 PM
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Thanks for the post of the old Titan Instructions, I have been doing searches off of Google, but did not find them, I did find pitures of the plastic fins, off of one sold on Ebay.

http://www.ebay.com/itm/Vtg-MPC-Tit...s-/370961775517
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  #29  
Old 03-02-2014, 01:48 PM
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Quote:
Originally Posted by Earl
How do you think a C6 would do in this bird? I have a couple of the originals that I had intended on building at least one, but not sure how a standard C6-3 will fair with one of these. I don't recall off hand what the flight-ready weight would be.

Seems Fred mentioned that the never-issued MPC C9 was supposed to have been for these two plastic kits. I never knew anyone who had one of these kits back in the day or reports of flights on other motors.

Earl


The old "fly or display" Vostok had two recommended MPC engines
The C6-4 and C9-3
MPC made a C6-4. I never saw a C9-3.
I would think an Estes C6-3 would be fine for a low altitude flight.
(Don't use a Quest C6-3 in this one . . .)
Jeff Lane did a review with flight results on RocketReviews.com:
http://www.rocketreviews.com/mpc-vo...-jeff-lane.html
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Old/New NAR # 19086 SR

www.oddlrockets.com
www.modelrocketbuilding.blogspot.com
http://www.nar.org/educational-reso...ing-techniques/
Your results may vary
"Nose cones roll, be careful with that."
Every spaceman needs a ray gun.
Look out - I'm the Meister Shyster!
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  #30  
Old 03-02-2014, 06:45 PM
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ghrocketman ghrocketman is offline
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Find some old Estes C5-3's, or use Aerotech 18mm D10/13/21/24's in it. The ones I remember seeing trying to fly on C6-3's back 30 years ago were out-of-control turds due to lack of reasonable thrust-to-weight. They flew about like most other PMC's; randomly, often crashing. If all I could find is C6-3's, a Titan IIIC would be grounded.
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