Australian Rocketry Association INC
April 27, 2017, 11:28:50 AM *
Welcome, Guest. Please login or register.

Login with username, password and session length
News: Stanbridges Hobbies
 
   Home   Help Login Register  
Pages: [1] 2 3 4   Go Down
  Print  
Author Topic: Terra Australis - Build  (Read 13935 times)
0 Members and 1 Guest are viewing this topic.
EMiR
ARA Member

Offline Offline

Posts: 1066


Sir L3


WWW
« on: October 23, 2011, 04:57:23 PM »

Project Build
Logged

EMiR
ARA Member

Offline Offline

Posts: 1066


Sir L3


WWW
« Reply #1 on: October 23, 2011, 09:01:40 PM »

hey Guys, I asked Phil to make board so I can post this build in and so you guys can keep up to date with whats happening

please feel free to give any suggestions or advice during this build



The Beta Design;

Deciding what colour to paint it?

Maroon is ARQ's team colours (Maroon and white)

Blue is for Australia, in which I'll have white stars (Southern Cross) on the top section





Logged

EMiR
ARA Member

Offline Offline

Posts: 1066


Sir L3


WWW
« Reply #2 on: October 23, 2011, 09:15:43 PM »

First up rolling Carbon tubes, you guys have seen how I do this, so I bore you with that,

tech specs..

Forward Airframe is 2 layers of Unidirectional 3k Carbon, then 3 layers of 2x2 twill
giving me 5 layers longitudinal strands and 3 layers of hoop strands

I did this so the forward tube can withstand more bending stresses, being it's long and unsupported.
this is a trade off between compressional forces and bending forces..

Idealy I shuold have used a 3 layers of 45x45 double bias carbon and 2 twill, but the shop didn't have any double bias, and I would have had to wait to order it in.
So I made do with out


Mid section Airframe and Booster section were rolled as follows;

1 layer of Uni 3K carbon, then 4 layers of 2x2 twill
giving me 5 layers of longitudinal strands and 4 layers of hoop strand.

This arragnment gives better compressional force, to deal with motor force, and fin forces

all tubes are 4" diameter and are 1.75mm wall thickness




Tubes are raw, they have not been sanded or polished
Logged

EMiR
ARA Member

Offline Offline

Posts: 1066


Sir L3


WWW
« Reply #3 on: October 23, 2011, 09:23:01 PM »

The Nose Cose, was molded from a 5:1 ogive plastic NC

I laid up the Nose cone with 4 layers of 100gsm twill Fiber glass then 3 layers of 250gsm 2x2 twill glass

I made to nose cone from fibre glass as to be radio transparent

the nice green colour is the gel coat, in which most will get sanded back.

the nose cone will be getting an aluminum tip, this week. to deal with the heat load a little.

Also I did read about the pssiblity of melting the epoxy at the tube and NC sholder join, and sticker the NC to the body tube
So I will be added foil tape to the NC shoulder

The NC will also houses the Telemetrum GPS Tracker, and ether a com-spec RDF or a big red bee GPS tracker
as well as a screamer for close range locating





Logged

EMiR
ARA Member

Offline Offline

Posts: 1066


Sir L3


WWW
« Reply #4 on: October 23, 2011, 09:39:46 PM »

Fin Stock


I am making the fins out of 3mm 3ply Bass wood and Carbon

The first lay up is as follows;

Ply wood
1 layer of Uni 3K carbon - Laid 45 degrees rear of the fin root cord
2 layers of 2x2 carbon twill - Laid 45 x 45
1 layer of Uni 3K carbon - Laid 45 degrees rear of the fin root cord
Ply wood


Then compressed, and allow a natural cure (avoid sap bubbles forming)

Marked to fins on the ply wood as to get Carbon layers correct orientation








Cut Cross section



The fin will get another 2 layer each side of 2x2 Carbon Twill after I give them an airfoil profile (Vacbagged and Post cured)

Logged

EMiR
ARA Member

Offline Offline

Posts: 1066


Sir L3


WWW
« Reply #5 on: October 23, 2011, 09:51:34 PM »

I rough cut the Body tube to length and sticky taped on the Fin Templates, to she how she will look

 

Yer.... this is a big rocket.....
Logged

EMiR
ARA Member

Offline Offline

Posts: 1066


Sir L3


WWW
« Reply #6 on: October 23, 2011, 09:58:27 PM »

Motor Bridle



I am making a motor bridle, to retain the motor during deployment.

I have used 3 x 1000lb kevlar cords folded in half to give me 6 line that will run down the side of the NOS tank
and be enbedded into a carbon fibre sleave, which will be on the aft side of the Metal sleave on the NOS tank

Total snap strength should be around the 3000lb/f mark


Harness attachment point has a 3600lb kevlar rope over laying the 3 1000lb cords



Prepairing the cords



Un-briad the cord, ready for layup in the carbon joiner,


Laying the cords flat to allow them to fit between the body tube and the Metal Tank sleave



The Carbon sleave will be between my hand and the metal sleave, and have the kevlar strands embedded in it
the keval strands across the metal sleave will be expoied flat and line up together


Logged

EMiR
ARA Member

Offline Offline

Posts: 1066


Sir L3


WWW
« Reply #7 on: October 23, 2011, 10:09:57 PM »

This week will be finishing the AV bay, which I've started.

And turning the Boat tail and nose cone tip

and doing the Airfoil profile on the fins ( I have to make a jig for this, as I will be using a router to profile)
Logged

EMiR
ARA Member

Offline Offline

Posts: 1066


Sir L3


WWW
« Reply #8 on: October 24, 2011, 05:41:12 PM »

Today I got a fair bit done

I got the Motor Bridle laid up.

Started with 2 layers of carbon
Then laid in the Kevlar strands



Then 2 top layers of carbon.


And compressed the hell out of it with electrical tape


Logged

EMiR
ARA Member

Offline Offline

Posts: 1066


Sir L3


WWW
« Reply #9 on: October 24, 2011, 06:04:45 PM »

Also got the Fin Jig made up today,

This is for getting the Airfoil bevels strait and even







Logged

wolflair
ARA Member

Offline Offline

Posts: 4357


V2


WWW
« Reply #10 on: October 24, 2011, 07:18:46 PM »

your build is looking good so far Ash
Logged

Join the Australian Rocketry Association INC the largest model and high power rocketry organisation in Australia

ARA # 007
ARA Level 3

WRL Rocketry
Australian Aerotech Dealer
Australian Rocketry Fo
EMiR
ARA Member

Offline Offline

Posts: 1066


Sir L3


WWW
« Reply #11 on: October 24, 2011, 07:51:13 PM »

Thanks mate,

Pressure is starting to get to me though,

So much to do and so little time...
Logged

wolfies gurl
ASIO

Offline Offline

Posts: 3098


Polecat Thumper on an M1297 yeah!!!!!


« Reply #12 on: October 24, 2011, 09:22:14 PM »

Thanks mate,

Pressure is starting to get to me though,

So much to do and so little time...


This I understand completely.

Best of luck Ash and dont worry what's the worst that can happen? errr right! lol
Logged

LEVEL 3 - Australia's first female LEVEL 3 Certification. 100% born and bred.

"Never tell me the sky's the limit when there are footprints on the moon"
EMiR
ARA Member

Offline Offline

Posts: 1066


Sir L3


WWW
« Reply #13 on: October 25, 2011, 07:43:33 AM »

Thanks Nat,

I finished ordering the rest of the gear last night,

I got a TAC-9A main chute for it with depolyment bag,
and 2x 24" drouges

Also got the second Raven ordered

so fingers crossed that all should be here next week


Logged

Pages: [1] 2 3 4   Go Up
  Print  
 
Jump to:  

Design By simply sibyl And CreateAForum.com
Powered by SMF 1.1.20 | SMF © 2013, Simple Machines