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  #31  
Old 10-01-2017, 12:59 AM
Initiator001 Initiator001 is offline
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Here's a picture of the three new kits which were just announced.

The Super Big Bertha is in a bag but the kit is changing to a box when it becomes available.
The change was required because the body tubes were getting damaged during shipment.
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  #32  
Old 10-01-2017, 03:42 PM
Woody's Workshop Woody's Workshop is offline
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I like all three.
It's too bad I am forced to sell many of my items in my collection right now.
I've missed out on many of new releases the past few years.
Including many of the "Classic Series".
Maybe if life ever starts treating me good again I will be able to buy some off Ebay and over pay just to have some to build and fly.
Such as life.
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  #33  
Old 10-01-2017, 05:04 PM
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Jerry Irvine Jerry Irvine is offline
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Quote:
Originally Posted by Initiator001
Here's a picture of the three new kits which were just announced.

The Super Big Bertha is in a bag but the kit is changing to a box when it becomes available.
The change was required because the body tubes were getting damaged during shipment.

The Astron explorer has too many nose cones. The Bertha deserves a box.
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  #34  
Old 10-02-2017, 08:15 AM
aeppel_cpm aeppel_cpm is offline
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[QUOTE=Jerry Irvine]While on this topic why don't they have a 29mm Blender kit? Why pay less for power?[QUOTE]

29mm Blender = awesome g80 flights!
38mm Quinstar = more awesomer.
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  #35  
Old 10-02-2017, 02:54 PM
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Royatl Royatl is offline
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Quote:
Originally Posted by Jerry Irvine
Estes is long on tube length variances over the years. They have a surprising number of diameters, some of which make sense (Centuri ST-13 Astrocam) and some of which do not (BT-52/56).

Jerry


BT-56 is just Estes' name for ST-13

BT-52 is a slip fit of BT-50 and it was used for the Thor Agena.

96 (thor diam.) / 60 (agena diam.) = 1.637 (bt-60 diam.) / 1.024 (bt-52 diam. + 0.01 -- I wonder if that wasn't an off-by-one error originally when specifying to the tube manufacturer?)
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  #36  
Old 10-02-2017, 03:18 PM
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mwtoelle mwtoelle is offline
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A shorter piece of BT-52 was also used in the K-39 Saturn V.
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  #37  
Old 10-02-2017, 05:50 PM
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Jerry Irvine Jerry Irvine is offline
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I wonder if BT-52 is Centuri ST-10?
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  #38  
Old 10-02-2017, 09:17 PM
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hcmbanjo hcmbanjo is offline
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Quote:
Originally Posted by Jerry Irvine
I wonder if BT-52 is Centuri ST-10?


From the Semroc website:
http://www.semroc.com/Store/Products/BodyTubes.asp


Estes BT-52 I.D. 0.988" O.D. 1.014"
Centuri ST-10 I.D. 1.000" O.D. 1.040"
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  #39  
Old 10-03-2017, 02:01 AM
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Royatl Royatl is offline
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Quote:
Originally Posted by Jerry Irvine
I wonder if BT-52 is Centuri ST-10?


no, ST-10 was 1.04" od, BT-52 was 1.014 od
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  #40  
Old 10-03-2017, 01:54 PM
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mwtoelle mwtoelle is offline
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Another thing to consider is that ST-10 has a wall thickness of 0.020", and the equivalent dimension on the BT-52 is 0.013". The Centuri tube has an extra layer of paper in it, so ST-10 is a bit sturdier than BT-52.
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