HPR X Wing - T70

Discussions for scratch builders. For the enthusiast that builds from the ground up. Tell us what you've built and what projects you working on in the space race.

Moderator: Moderators

Aquaman33
Rocket Crew
Rocket Crew
Posts: 408
Joined: Tue Jul 03, 2018 6:12 pm

Re: HPR X Wing - T70

Postby Aquaman33 » Sat Nov 07, 2020 9:35 pm

How's the build going Matt?

Any update?

:D

User avatar
SpaceManMat
Astronaut
Astronaut
Posts: 2329
Joined: Mon Dec 15, 2008 9:56 pm
Location: Brisbane

Re: HPR X Wing - T70

Postby SpaceManMat » Sun Nov 08, 2020 11:18 pm

Aquaman33 wrote:How's the build going Matt?

Any update?

:D


It’s been a bit painful I’m afraid. Got knocked over and busted a wing, which I then botched the repair (mixed the epoxy wrong so it would never set). I have removed the broken wing and cut a new one, need to bevel it which is a major pain and then put it back together including the 2 body panels I had to remove. I have also have a special purpose stand mostly built. Unfortunately other things have been a priority so have not got further. :roll:
QRS: 124
AMRS: 32 L2 RSO
Highest Altitude: 13,647 feet
Fastest Flight: Mach 1.55
Largest Motor: CTI 1115J530 IM
Current Project: X Wing

Aquaman33
Rocket Crew
Rocket Crew
Posts: 408
Joined: Tue Jul 03, 2018 6:12 pm

Re: HPR X Wing - T70

Postby Aquaman33 » Mon Nov 09, 2020 7:11 am

SpaceManMat wrote:
Aquaman33 wrote:How's the build going Matt?

Any update?

:D


It’s been a bit painful I’m afraid. Got knocked over and busted a wing, which I then botched the repair (mixed the epoxy wrong so it would never set). I have removed the broken wing and cut a new one, need to bevel it which is a major pain and then put it back together including the 2 body panels I had to remove. I have also have a special purpose stand mostly built. Unfortunately other things have been a priority so have not got further. :roll:


I know your pain. I have so many half finished projects. Its hard when you hit a hurdle and then other stuff gets in the way.

Best of luck with the rest of the build.

User avatar
SpaceManMat
Astronaut
Astronaut
Posts: 2329
Joined: Mon Dec 15, 2008 9:56 pm
Location: Brisbane

Re: HPR X Wing - T70

Postby SpaceManMat » Sun Feb 21, 2021 11:05 pm

I’ve finally got this build back on track am now back to working on the nose weight.
I started out moulding clay around the 3D printed model of the weight.
Image
Nose Weight Mould on Flickr

I then removed the 3D printed shape and let the clay air dry on top of the fridge for about a week.

Next I made up a smelting container out of a fruit salad tin, complete with spout and handle.
Image
Nose Weight Mould and Smelting Container on Flickr

I then placed a bag of lead sinkers in the smelting container and used the BBQ to melt it.
Image
Melting the Nose Weight on Flickr

Once the lead was fully melted, I waited a few extra minutes to make sure I had plenty of heat so the lead would not solidify too quickly as I poured it. I also added about 30% more lead than I thought was required, again to make sure I had extra heat and to account for any lead that solidified during the pour. I decided to get a little video of the pour as it’s not something I had seen documented on the forum. I did noticed some bubbling occurred in the molten lead, I believe it was caused by boil off of the small amount of water left in the clay. I had thought was a possibility, what I really wanted to avoid was having lots of water and getting violent boil off sending lead everywhere, hence leaving the clay to dry for a week and also using a full face mask. You can see the shimmer of the molten lead in the video as the boil off occurs.

As the lead solidified it formed a nice little dip in the middle, it should not be of any consequence as I filled it with more lead than required.
Image
Nose Weight Pour Completed on Flickr

Once it all cooled off I split the mould open to reveal the cast nose weight. Really happy with the result, the spiky ridges are where cracks formed during the drying. It should be easy enough to tidy the cast up with a file, then I can weigh it and fit it to the sled.
Image
Nose Weight Cast Result on Flickr
QRS: 124
AMRS: 32 L2 RSO
Highest Altitude: 13,647 feet
Fastest Flight: Mach 1.55
Largest Motor: CTI 1115J530 IM
Current Project: X Wing

User avatar
kopius
Elle3
Elle3
Posts: 2971
Joined: Mon Apr 23, 2007 4:30 pm
Location: Gold Coast, Queensland
Contact:

Re: HPR X Wing - T70

Postby kopius » Mon Feb 22, 2021 10:20 pm

That's awesome work Mat!!

This is such a great build thread

Sent from my SM-G973F using Tapatalk
QRS Secretary

AMRS #3 L3 ACO
Life member of QRS

NAR L2 #98260

MDRA Member #0241

drew
Southern fried goodness
Southern fried goodness
Posts: 1074
Joined: Sat Aug 01, 2009 10:20 pm
Location: Perth

Re: HPR X Wing - T70

Postby drew » Wed Feb 24, 2021 10:07 pm

Excellent work Mat! I'm having flashbacks to my childhood when my father would melt lead in a process virtually identical to this to pour lead weights for duck decoys.
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

User avatar
str8up
Children, today we're going to learn about space
Children, today we're going to learn about space
Posts: 469
Joined: Sat Oct 06, 2012 1:02 pm
Location: Karalee QLD

Re: HPR X Wing - T70

Postby str8up » Fri Feb 26, 2021 6:45 am

So drew that explains why you are so totally 'quackers'.

Hope all is well on your side of the big island mate.

drew
Southern fried goodness
Southern fried goodness
Posts: 1074
Joined: Sat Aug 01, 2009 10:20 pm
Location: Perth

Re: HPR X Wing - T70

Postby drew » Tue Mar 02, 2021 11:37 am

str8up wrote:So drew that explains why you are so totally 'quackers'.

Hope all is well on your side of the big island mate.


Look, lead fumes are fine, right? I mean, if I ate some flecks that shouldn't be an issue, correct? :D

I hope y'all are well over there too bud. I'm hoping to get over your way in 2022 to attempt some shenanigans! Fingers crossed.
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

User avatar
SpaceManMat
Astronaut
Astronaut
Posts: 2329
Joined: Mon Dec 15, 2008 9:56 pm
Location: Brisbane

Re: HPR X Wing - T70

Postby SpaceManMat » Tue Mar 09, 2021 10:03 pm

So having done the pour I then proceeded to clean up the weight. It appears in the process of removing the 3D print from the mould I flattened the tip, also as it dried it warped too. Nothing that a file and a grinder couldn’t sort out. Next I cut the weight with a hacksaw so that it would fit either side of the sled. After doing that I realised I had cut the top part but sized it for the larger bottom :roll: In addition the shape I designed could not fit through the shoulder of the nose cone :roll: Fortunately this is a case of 2 wrongs making a right, back to the grinder for a lot more work :oops:

I started with 315 grams, cut, ground and drilled it down to 190 grams :lol:

This is the larger bottom weight which is 137 grams
Image
Nose Weight on Flickr

The smaller (although longer) top weight is 52 grams, it is narrower to accommodate nuts that are epoxied to the shoulder.
Image
Nose Weight on Flickr

I need to go back to the sims, from memory I was looking to put up to 200 grams of weight in the nose, so this has turned out pretty good in the end. The maximum nose weight combined with the largest motor will be used to determine how long the nose will be so that I can maintain a stable design.
QRS: 124
AMRS: 32 L2 RSO
Highest Altitude: 13,647 feet
Fastest Flight: Mach 1.55
Largest Motor: CTI 1115J530 IM
Current Project: X Wing

Aquaman33
Rocket Crew
Rocket Crew
Posts: 408
Joined: Tue Jul 03, 2018 6:12 pm

Re: HPR X Wing - T70

Postby Aquaman33 » Thu Mar 11, 2021 6:20 am

Great work.

Nice to see something different on this forum.

User avatar
SpaceManMat
Astronaut
Astronaut
Posts: 2329
Joined: Mon Dec 15, 2008 9:56 pm
Location: Brisbane

Re: HPR X Wing - T70

Postby SpaceManMat » Wed Apr 28, 2021 1:13 am

Some good progress has been happening...

First I fitted a bulkhead and recovery cord.
Image
Parachute Bulkhead on Flickr.

The bulkhead is fitted ahead of a 5G case, the shock cord was run through the main tube. A skewer used to thread it through.
Image
Threading Recovery Chord on Flickr

Then externally cockpit bulkhead was attached and the recovery cord secured.
Image
Cockpit Section and Bulk Head Fitted on Flickr

This arrangement prevents the parachute from being push further down the tube.
QRS: 124
AMRS: 32 L2 RSO
Highest Altitude: 13,647 feet
Fastest Flight: Mach 1.55
Largest Motor: CTI 1115J530 IM
Current Project: X Wing

User avatar
SpaceManMat
Astronaut
Astronaut
Posts: 2329
Joined: Mon Dec 15, 2008 9:56 pm
Location: Brisbane

Re: HPR X Wing - T70

Postby SpaceManMat » Wed Apr 28, 2021 1:29 am

Next the forward bulkhead was attached externally.
I had planned to just cover the 2 bulkheads with cardboard to create the external skin, however I decided that it is too flimsy so added a balsa frame to support he skin.
Image
Forward Structure on Flickr

Two 2mm vent holes were added to the parachute bay, these then vent forward via 4 vents in the forward bulkhead (not shown) or rearward eventually exiting via the the astromech bay.

Finally the skin was attached.
Image
Nose Completed on Flickr
QRS: 124
AMRS: 32 L2 RSO
Highest Altitude: 13,647 feet
Fastest Flight: Mach 1.55
Largest Motor: CTI 1115J530 IM
Current Project: X Wing

User avatar
markf74
Rocket Flyer
Rocket Flyer
Posts: 83
Joined: Sun Jul 12, 2020 6:11 pm
Location: Ipswich

Re: HPR X Wing - T70

Postby markf74 » Wed Apr 28, 2021 7:04 am

This looks great ! Love the progress and detail.
QRS # 271
AMRS #367
L1 - PML Calisto on DMS H115DM-14 Metalstorm
L2 - LOC 835 "Bodgy One" on DMS J425R-14 , Dual Deploy
L3 - ???
http://fehringerrocketry.com/

User avatar
SpaceManMat
Astronaut
Astronaut
Posts: 2329
Joined: Mon Dec 15, 2008 9:56 pm
Location: Brisbane

Re: HPR X Wing - T70

Postby SpaceManMat » Mon May 03, 2021 9:49 pm

The cockpit and canopy sections have been added so we are pretty much done 8)
I also assembled the stand I designed for it, I do need to get a few more bolts and wing nuts to finish it off.

Image
X Wing Ready for testing on Flickr

I do think that the canopy needs to be longer, particularly at the back. This is due to me stretching the X Wing nose for stability reasons. Also I need to figure out how to build more structural rigidity into the canopy, but for the first test flight it will be fine. The plan is to use a CTI G115 motor with an expected altitude of 700 feet.

I also did some testing on the electronics and ejection charge with good results, although I think I should lengthen the recovery harness to give it the nose a chance to slow down a bit more.
QRS: 124
AMRS: 32 L2 RSO
Highest Altitude: 13,647 feet
Fastest Flight: Mach 1.55
Largest Motor: CTI 1115J530 IM
Current Project: X Wing

Aquaman33
Rocket Crew
Rocket Crew
Posts: 408
Joined: Tue Jul 03, 2018 6:12 pm

Re: HPR X Wing - T70

Postby Aquaman33 » Tue May 04, 2021 9:15 am

I was just thinking about Star Wars rockets as its May 4th.

Great to see this project is still progressing.


Return to “Scratch Built”

Who is online

Users browsing this forum: No registered users and 6 guests