Airframe choices (or why you should consider rolling your own airframes)

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Viking
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Re: Airframe choices (or why you should consider rolling your own airframes)

Postby Viking » Tue May 22, 2018 1:32 pm

Simon

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Re: Airframe choices (or why you should consider rolling your own airframes)

Postby drew » Wed May 23, 2018 9:40 am

Andrew Hamilton
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Max Alt AGL - 26,850ft - L935 - THUNDA 2019
Max V - 3,004 ft/s, ~Mach 2.67 - L935 - THUNDA 2019

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Re: Airframe choices (or why you should consider rolling your own airframes)

Postby 03flyer » Wed May 23, 2018 10:21 pm


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Re: Airframe choices (or why you should consider rolling your own airframes)

Postby Viking » Thu May 24, 2018 1:23 am

Was simply asking if his surname is Burger. Nothing more to it than that. But you've answered my question.
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Re: Airframe choices (or why you should consider rolling your own airframes)

Postby Oldboy » Thu May 24, 2018 11:19 pm

If using chicken wire to lay glass over ,
1, Would that cause any interference to electronics ,ie tracking ?
2,I have made things using similar process, but is this acceptable with the minimum use of metal in our hobby ?
Queries to the of knowledgeable folks with in our hobby
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Re: Airframe choices (or why you should consider rolling your own airframes)

Postby drew » Fri May 25, 2018 12:36 pm

Andrew Hamilton
AMRS 28 L3
AMRS Records Committee Chairman
Max Alt AGL - 26,850ft - L935 - THUNDA 2019
Max V - 3,004 ft/s, ~Mach 2.67 - L935 - THUNDA 2019

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Re: Airframe choices (or why you should consider rolling your own airframes)

Postby OverTheTop » Fri Jun 01, 2018 7:07 pm

TRA #13430
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"Everybody's simulation model is guilty until proven innocent" (Thomas H. Lawrence 1994)

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Re: Airframe choices (or why you should consider rolling your own airframes)

Postby joeman » Wed Jun 13, 2018 6:58 am

Hello,
I've decided I'm going to roll my own air-frame for the next rocket.

I've been looking high/low for a supplier of tubes that could sell me something to use as a Mandrel - 38mm.

AusRocketry sell couplers, but all small sizes. Nothing long enough to roll on.

What are others using as a Mandrel? Can anyone suggest a possible supplier?

Thanks!

Joe
L1 - Callisto (H133) - 11-Jan-2016
L2 - March Fly (1633K940) - 18-Mar-2018 - RSO

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OverTheTop
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Re: Airframe choices (or why you should consider rolling your own airframes)

Postby OverTheTop » Wed Jun 13, 2018 7:36 am

TRA #13430
L3
"Everybody's simulation model is guilty until proven innocent" (Thomas H. Lawrence 1994)

drew
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Re: Airframe choices (or why you should consider rolling your own airframes)

Postby drew » Wed Jun 13, 2018 9:48 am

Andrew Hamilton
AMRS 28 L3
AMRS Records Committee Chairman
Max Alt AGL - 26,850ft - L935 - THUNDA 2019
Max V - 3,004 ft/s, ~Mach 2.67 - L935 - THUNDA 2019

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Re: Airframe choices (or why you should consider rolling your own airframes)

Postby Viking » Wed Jun 13, 2018 12:36 pm

Simon

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Re: Airframe choices (or why you should consider rolling your own airframes)

Postby joeman » Wed Jun 13, 2018 3:15 pm

Hi Guys,
Yep, MD.

RE: Length
I was hoping to create one tube that I could then cut the switch-band and air-frame from...so I know they will have a nice fit.
I've assumed first 50mm of each end are "waste", so when i add it up...it does add up to over 1m.
[When I have a bit more to show..... I'll start up a build thread]

I have managed to find Aluminum tubes - 38.1mm (Capral in Cairns) - which happens to be same diameter as the PRO38 cases. Not sure how straight they are. I'll find out. Still might give Blake a tingle

Guess it is a case of build a few tubes and check to see how things fit and improve as one goes along. Patience and persistence.



Cheers!
Joe
L1 - Callisto (H133) - 11-Jan-2016
L2 - March Fly (1633K940) - 18-Mar-2018 - RSO

drew
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Re: Airframe choices (or why you should consider rolling your own airframes)

Postby drew » Wed Jun 13, 2018 3:21 pm

Andrew Hamilton
AMRS 28 L3
AMRS Records Committee Chairman
Max Alt AGL - 26,850ft - L935 - THUNDA 2019
Max V - 3,004 ft/s, ~Mach 2.67 - L935 - THUNDA 2019

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Viking
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Location: Perth WA

Re: Airframe choices (or why you should consider rolling your own airframes)

Postby Viking » Thu Jun 14, 2018 5:06 pm

Simon

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Re: Airframe choices (or why you should consider rolling your own airframes)

Postby joeman » Fri Jun 29, 2018 9:48 am

I've been having a "play" with Glad Bake on the "possible" pipe I'll use as a Mandrel. I figured this is a very important thing to get right because so many people seem to run into some grief removing their finished air-frame.

NOTE: I've taken note of Drew's comment regarding two layers of Glade Bake... and this sounds like a sensible place to start.

First attempt
Wrapping Glade bake (1 piece of glad-bake) two times around and taping on to itself seems to be a bad way to go about it, because when I try and simulate removing the air-frame, the two glade bake layers tend to crease up and cause it to jam.

Second attempt
So I tried two separate pieces of glad-bake. Put one on...tape it up to itself. Put the other piece on and tape it to itself. The outer layer glides VERY easily over the inner one. So easily I need to apply tape at each end to the mandrel. So I'm thinking this is probably how I'll do it, at least in the first instance.

Seems like a lot of people have their own way of rolling it on..taping it up, etc. Probably just a case of working out what works best for one self I guess.


Cheers

Joe
L1 - Callisto (H133) - 11-Jan-2016
L2 - March Fly (1633K940) - 18-Mar-2018 - RSO


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