Launch lug Alignments

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joeman
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Launch lug Alignments

Postby joeman » Sun Sep 04, 2016 11:59 am

Hello,
Doing some Junior rockets at school and I've taken them home to do some flight-ready checks. Still ~ 2 weeks from launch. Dealt with several issues, fins come off, etc. All easy to deal with issues - except 1.

On a few rockets, the lug is mis-aligned slightly. The lug inner diameter is 5mm and the Rod is ~3.2mm. So there is already a bit of slack. However it is a bit too mis-aligned for my liking.

These lugs are VERY well attached to the tube - and no way to try and remove them.

I've had a think about the issue and thought that we might be able to attach another lug on to the model rocket - this time parallel and leave the existing one. I know that we will get a bit more drag so, theoretically slightly alter flight, but thinking it might be best option. What do others think?


Cheers!

Joe
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Mis-aligned lug
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L1 - Callisto (H133) - 11-Jan-2016

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OverTheTop
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Re: Launch lug Alignments

Postby OverTheTop » Sun Sep 04, 2016 1:39 pm

Perhaps shorten the lug a bit so the angle produces less offset in the ends? A scalpel would do a great job of this.

Probably only need to do one I suppose.
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Jordz
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Re: Launch lug Alignments

Postby Jordz » Sun Sep 04, 2016 4:37 pm

Put new lugs on the opposite side and shave off the existing ones with a scalpel. Worst case scenario if you cant remove the original lugs, the rocket will still be equally balanced with both weight and drag across its diameter so it wont fly off on an angle.

joeman
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Re: Launch lug Alignments

Postby joeman » Wed Sep 07, 2016 9:04 am

Nice idea.

Just waiting on Lugs to arrive and will see.
L1 - Callisto (H133) - 11-Jan-2016

matthew
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Re: Launch lug Alignments

Postby matthew » Wed Sep 07, 2016 5:25 pm

joeman wrote:Nice idea.

Just waiting on Lugs to arrive and will see.


Joe, I have heaps of LPR parts. I'm out at the Uni every day, so not far away. I can meet up with you if you want some bits. You probably still have my phone number.
Matthew Small
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joeman
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Re: Launch lug Alignments

Postby joeman » Sat Sep 10, 2016 9:06 pm

Thanks Matt :)

Very nice of you. I have the bits here for now, but if push comes to shove.

BTW, doing a little bit of model rocketry with year 5's and year 6's at Trinity Beach. Been really good so far.
Launch this week, weather permitting.
L1 - Callisto (H133) - 11-Jan-2016


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