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How interchangable are parts from different manufacturers?

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soopirV

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I'm sure this has been asked, but I don't have strong google-fu tonight...
I have a MadCow Mini DX3 that I built stock, and now want to convert to dual deploy. Madcow sells the tube I need, but is out of stock on the coupler. I can get a 38mm tube and coupler from Discount Rocketry for a great price, but I'm not sure it'll work...anyone ever mix brands (bonus points if it's THESE brands!)? Any tips and tricks to recommend? Thanks in advance!
 

DavidMcCann

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Madcow and RW and old wildman FG all match up.

LOC cardboard and blue tube "sorta" match up but I do it a lot with success.

Not sure where DR sources from, so can't help you there.
 

caveduck

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Discount Rocketry (modelrockets.us) is very thorough about providing dimensions on their tubes and couplers. Madcow, not so much; they don't list dimensions for their couplers. But I have been researching all sorts of parts for my OpenRocket add-on parts database (see https://github.com/dbcook/openrocket-database) and have a pretty good idea. The Madcow 38mm tubes are nominally 5 mils larger than the DR tubes (1.635 Madcow vs 1.630 OR). This should mean that the DR coupler should work but will have an extra 5 mils of clearance, which could make it a bit loose, but I think it oughtta be OK.
 

Handeman

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You can always order the DR coupler and if it doesn't work, it's a good excuse to spend time waiting on the Madcow coupler by buying the DR BTs and scratch building another rocket. Can't have too many rocket ya know!
 
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