F-Motor Record???

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jhurst7
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Re: F-Motor Record???

Postby jhurst7 » Wed Nov 02, 2016 4:26 pm

Thanks everyone.


I've made the Tailcone Retainer in Inventor and the Nose Cone in OpenScad.
The files aren't able to be attached.
I'll send them off to be 3D printed.

I should be able to make another body tube tomorrow, the last one did not turn out well.
Thanks

-James
L1- AMRAAM 2- H54

jhurst7
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Re: F-Motor Record???

Postby jhurst7 » Wed Nov 09, 2016 8:57 pm

I have now finished my body tube, only a bit of it to be sanded.

I also got the Pro24 motor hardware today thanks to AusRocketry.

It fit well with only a small gap around the edges.
Overall, I am very happy with the body tube.

I should be getting back my 3D printed pieces tomorrow, we'll see how they go!
I will attach pictures when I am able to take them tomorrow.

Also, what is a good rotational speed to have parachutes deploy at (rpm or °/s) so that they don't get tangled?
Is there any way I can control this apart from not spin-stabilising it?

Thanks.

-James
L1- AMRAAM 2- H54

jhurst7
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Re: F-Motor Record???

Postby jhurst7 » Sun Nov 13, 2016 6:26 pm

Just a quick question on spin stabilisation, what is a good rpm to deploy at?
L1- AMRAAM 2- H54

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Jordz
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Re: F-Motor Record???

Postby Jordz » Mon Nov 14, 2016 2:47 pm

Got any bodytube pics? Love seeing progress haha

jhurst7
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Re: F-Motor Record???

Postby jhurst7 » Mon Nov 14, 2016 8:02 pm

Yeah, I think I posted one, but some posts have been getting deleted.

I don't have it right now but should have it in a few days.

I think we might call the rocket Bugsy... a bug got stuck in the body tube, it was sanded out though.
L1- AMRAAM 2- H54

Lister
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Re: F-Motor Record???

Postby Lister » Sun Jan 01, 2017 11:04 am

Gday mate.

Havent been on here in a while but noticed this thread.. how is the build going? How did the 3D printed parts turn out? I just got myself a 3D printer (Tevo Black Widow) and will be printing parts, moulds and mandrels for my rockets with it mainly using Nylon and CF filaments.

You have probably figured this out but you need to be very exact with the internal diameter of 24mm tubes.. too small and you wont get the motor in and too large and the rear closure goes in aswell. From memory (been a few months since I touched 24mm tubes) my mandrel diameter is 24.4mm.. I will run the calipers over it when I get home.

Also if you need a nose cone I have a mandrel here for my 24mm nose cone.. its a very thin wall (think ID is 24mm) and the coupler ID is 22mm which means you can fit an Atlus Metrum easy Mini and Vances gps tracker and 915mhz raido into the nose. Only thing is it has a metallic tip (Steel) as I dont have any aluminium. You can also get a tapered rear closure from carloina composites that is made for CTI 24mm cases and thin wall tubes.

Cheers,
L

jhurst7
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Re: F-Motor Record???

Postby jhurst7 » Sun Jan 22, 2017 3:02 pm

Sorry for the delay, I haven't been on the forum in quite a while with other commitments.
I recently finished my fins and have airfoiled them. I will be using JB Weld to attach them to the 24mm Fibreglass tube and then using Araldite to strengthen with fillets.
I will try and attach some body tube pictures and pictures of the nose cone and tail cone.
The 3D printing for the tail cone did not work out quite as well as I would have liked however I may still use the nosecone.
I looked into the tail cone suggestion from Lister and I have sent an inquiry to Carolina Composites. Thanks.
I do agree with Lister about how it is tough to get the ID of the tube exact.
I combated this by adding rolls of newspaper around my tube that I used and this allowed me to get it more exact.
Overall, the build is going quite well and should be able to get it out to Jimboomba for a few trial launches on lesser motors before Westmar.
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IMG_0424.png (250.42 KiB) Viewed 1641 times
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IMG_0426.png (222.55 KiB) Viewed 1641 times
L1- AMRAAM 2- H54


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