Making fibreglass nose cones

Discussions about techniques for rocket building. Leave your tips and tricks to making the perfect rocket.

Moderator: Moderators

krusty
Engineer
Engineer
Posts: 1306
Joined: Tue Nov 27, 2007 12:21 pm
Location: Noble Park, Vic, Australia
Contact:

Re: Making fibreglass nose cones

Postby krusty » Sat Jan 26, 2013 10:45 pm




krusty
Engineer
Engineer
Posts: 1306
Joined: Tue Nov 27, 2007 12:21 pm
Location: Noble Park, Vic, Australia
Contact:

Re: Making fibreglass nose cones

Postby krusty » Sat Feb 02, 2013 12:27 am

Ok, here's what I've been doing for the last few days :)

I've started with one of the new Estes Mega Der Red Max. This is a 4" kit and it's huge!!
MDRM-NC0-s.jpg
MDRM-NC0-s.jpg (40.38 KiB) Viewed 2247 times


The nose cone is 16.5" / 420mm from the tip to the shoulder. The shoulder is 4" / 100mm for a total length of 20.5" / 520mm
MDRM-NC1-s.jpg
MDRM-NC1-s.jpg (15.1 KiB) Viewed 2247 times


The first thing I did was to create the parting plate etc. to hold the nose cone nice and straight.
MDRM-NC2-s.jpg
MDRM-NC2-s.jpg (26.92 KiB) Viewed 2247 times


And put in supports underneath
MDRM-NC4-s.jpg
MDRM-NC4-s.jpg (31.57 KiB) Viewed 2247 times


(Continued...)

Krusty



krusty
Engineer
Engineer
Posts: 1306
Joined: Tue Nov 27, 2007 12:21 pm
Location: Noble Park, Vic, Australia
Contact:

Re: Making fibreglass nose cones

Postby krusty » Sat Feb 02, 2013 12:32 am

Here's the first side curing -
MDRM-NC5-s.jpg
MDRM-NC5-s.jpg (124.77 KiB) Viewed 2246 times


After two days I removed it from the board. It came away perfectly!!
I had planned on rolling the nose over to avoid having the shock cord attachment point show up but in stead I cast a big block of silicone rubber into the space instead. There's going to be a bit of a mark in the mold around the edge of the rubber but it won't matter.
MDRM-NC6-s.jpg
MDRM-NC6-s.jpg (72.23 KiB) Viewed 2246 times


And now the second side is curing...
MDRM-NC7-s.jpg
MDRM-NC7-s.jpg (178.45 KiB) Viewed 2246 times


I dyed the gel coat red for the first half and, to contrast, blue for the 2nd. It did make it easier to see where i was working :)

Now to wait!!!!

Krusty



PJR
Rocket Crew
Rocket Crew
Posts: 267
Joined: Fri Jul 13, 2012 7:37 pm
Location: Albion Park/Wollongong

Re: Making fibreglass nose cones

Postby PJR » Sat Feb 02, 2013 8:40 am

krusty great look mould. Good idea with the silicone rubber.

Phil

krusty
Engineer
Engineer
Posts: 1306
Joined: Tue Nov 27, 2007 12:21 pm
Location: Noble Park, Vic, Australia
Contact:

Re: Making fibreglass nose cones

Postby krusty » Tue Feb 05, 2013 1:56 pm

First nose out of the mold!

Was a bit thin (only a couple of layers of glass) so I filled it with two-part foam. Didn't add much weight - but it's now rock solid :)

Sanding and finishing next :)

3.9-inch-nc.jpg
3.9-inch-nc.jpg (28.14 KiB) Viewed 2210 times

(Not a great photo - taken on my phone!)

Krusty



PJR
Rocket Crew
Rocket Crew
Posts: 267
Joined: Fri Jul 13, 2012 7:37 pm
Location: Albion Park/Wollongong

Re: Making fibreglass nose cones

Postby PJR » Tue Feb 05, 2013 2:10 pm

krusty great job on the nose cone :) . I did the same thing this week. On my 2.5" cones I use 2 layer of 3 oz/84g glass and they are quite strong. I wanted a light nose cone for my Sladgehammer so I tried 1 layer came out like paper. Layed up another and it came out at 27g, Happy with that.

Phil
Last edited by PJR on Tue Feb 05, 2013 2:20 pm, edited 2 times in total.

air.command
Astronaut
Astronaut
Posts: 1954
Joined: Mon May 14, 2007 11:18 am
Location: Sydney, Australia
Contact:

Re: Making fibreglass nose cones

Postby air.command » Tue Feb 05, 2013 2:18 pm

Very nice work on the nosecone krusty! How have you attached the shock cord loop, just glued it to the side? How much does the whole nosecone weigh?
Crop Circles: ... just a bunch of guys looking for their rockets ....

rocket_troy
Engineer
Engineer
Posts: 1005
Joined: Thu Oct 09, 2008 9:30 pm
Location: Melbourne Australia
Contact:

Re: Making fibreglass nose cones

Postby rocket_troy » Tue Feb 05, 2013 2:51 pm

Nice work Krusty.

TP
ERG #02


Return to “How to's”

Who is online

Users browsing this forum: No registered users and 1 guest