Search found 2639 matches

by OverTheTop
Thu Aug 23, 2018 8:49 pm
Forum: News & Events
Topic: Curt von Delius hits 200k' with his Phoenix 4 2 stage stack
Replies: 31
Views: 8036

Re: Curt von Delius hits 200k' with his Phoenix 4 2 stage stack

Congrats to CvD for the epic flight. I do find it interesting that with such a flight a GPS capable of working at that altitude was not procured. They are available essentially off the shelf, and with the not insignificant expense of such a large project I would have thought Curt would have gone to ...
by OverTheTop
Thu Aug 23, 2018 2:49 pm
Forum: Scratch Built
Topic: Joe Turner's 38mm Scratch-Build
Replies: 89
Views: 27175

Re: Joe Turner's 38mm Scratch-Build

You can save a bit of mass, if you want, by making the motor mount part of the coupler/avionics bay. I am using that on a project I have sitting on the bench currently: viewtopic.php?f=6&t=6030
by OverTheTop
Mon Aug 20, 2018 9:41 pm
Forum: Mid/High Powered Rocketry
Topic: Nike Apache Half-Scale Project
Replies: 91
Views: 16779

Re: Nike Apache Half-Scale Project

I had to hold the two connectors for the aft end to the sled, but allow the rear bulkhead to be removable. A piece of 0.5mm fiberglass holds the 20 way battery charging connector to the threaded standoff on the sled. Connector glued on with Loctite 401 3res.JPG A piece of 1.6mm f/g holds the 2 way c...
by OverTheTop
Mon Aug 20, 2018 4:19 pm
Forum: Melbourne Amateur Rocket Society Inc.
Topic: Tripoli (Victoria) August 2018 Launch
Replies: 6
Views: 949

IT IS ON AGAIN!!!

IT IS ON AGAIN!!! Our committee is committed to trying to get more viable launches this year, and to this end we have scheduled the next launch for 26th August 2018 . The weather forecast is looking spectacular in the lead-up to that date currently. This decision is based on getting our members roc...
by OverTheTop
Sat Aug 18, 2018 8:46 pm
Forum: Mid/High Powered Rocketry
Topic: Nike Apache Half-Scale Project
Replies: 91
Views: 16779

Progress

Progress

Altimeters wired up

DSC07154resize.JPG


DSC07157resize.JPG


DSC07158resize.JPG


Still yet to connect up the sustainer ignition circuit and the battery monitoring connector to the aft end.
by OverTheTop
Sat Aug 18, 2018 3:01 pm
Forum: News & Events
Topic: Curt von Delius hits 200k' with his Phoenix 4 2 stage stack
Replies: 31
Views: 8036

Re: Curt von Delius hits 200k' with his Phoenix 4 2 stage stack

Don't get me started on a conversation about significant figures :roll:

Six significant figures based on a simulation? I don't think so. As Drew said, round it down to three and it would probably be acceptable.
by OverTheTop
Fri Aug 17, 2018 7:23 am
Forum: Melbourne Amateur Rocket Society Inc.
Topic: Tripoli (Victoria) August 2018 Launch
Replies: 6
Views: 949

Launch Cancelled

Cancelled

The weather has not proven favourable for us this month. Conditions are unsuitable again for this coming weekend so we are going to cancel. :( :( :(

The next launch is the September launch, scheduled for 2nd September 2018.
by OverTheTop
Sun Aug 12, 2018 2:49 pm
Forum: Mid/High Powered Rocketry
Topic: Nike Apache Half-Scale Project
Replies: 91
Views: 16779

Sustainer Main Altimeter Bay

My next challenge is to turn this
DSC07152res.JPG


into this
Sch.png
by OverTheTop
Sun Aug 12, 2018 10:42 am
Forum: Higher, Faster, Further
Topic: Vertical Trajectory System (with some 3D printed parts)
Replies: 69
Views: 32225

Re: Vertical Trajectory System (with some 3D printed parts)

Still On Hold
:(

All buttoned up and ready to go. Just need the weather to cooperate. Launched cancelled for a second time. Trying again for 19th August.

OnWallOnHold.jpg
by OverTheTop
Fri Aug 10, 2018 8:53 pm
Forum: Thunda Down Under 2019
Topic: Thunda Down Under tickets available
Replies: 6
Views: 2715

Re: Thunda Down Under tickets available

Looking forward to this one! Booked.
by OverTheTop
Thu Aug 09, 2018 8:18 pm
Forum: Melbourne Amateur Rocket Society Inc.
Topic: Tripoli (Victoria) August 2018 Launch
Replies: 6
Views: 949

Re: Tripoli (Victoria) August 2018 Launch

HOLD, HOLD, HOLD AGAIN Some of our committee have just visited Serpentine and the ground is already quite wet from rains, and further rain and storms forecast for Saturday will make it a mudpit. Strong winds are also forecast for Sunday which would make flights difficult. Keeping in mind that oppor...
by OverTheTop
Thu Aug 09, 2018 8:18 am
Forum: Melbourne Amateur Rocket Society Inc.
Topic: Tripoli (Victoria) August 2018 Launch
Replies: 6
Views: 949

Re: Tripoli (Victoria) August 2018 Launch

Waiting...

We are still evaluating the weather for the rescheduled launch on 12th August 2018. I will update here when I have information. Ground condition of the access tracks is a big concern due to forecast rain and storm on Saturday 11th :( .
by OverTheTop
Fri Aug 03, 2018 6:25 pm
Forum: Mid/High Powered Rocketry
Topic: Half-Scale Apache, Flying Solo
Replies: 4
Views: 1112

Re: Half-Scale Apache, Flying Solo

I have been a bit slack getting this post happening. I just got busy and missed that I hadn't posted it :( The Apache flew again at MARS Attacks in early August 2017. Entirely nominal. 13k' on an M1770. Mach 1.1. Landed 1.9km downrange. Apache1aresize.JPG Apache3Resize3.jpg Apache2resize.jpg Here is...
by OverTheTop
Fri Aug 03, 2018 12:17 pm
Forum: Higher, Faster, Further
Topic: Vertical Trajectory System (with some 3D printed parts)
Replies: 69
Views: 32225

Re: Vertical Trajectory System (with some 3D printed parts)

Fins should be fine. NC assembly lands after the main airframe so velocity under the chute should be less than the average sink rate.

Fins are strong. They will be fine. Servo flange, maybe...
by OverTheTop
Thu Aug 02, 2018 6:38 pm
Forum: Higher, Faster, Further
Topic: Vertical Trajectory System (with some 3D printed parts)
Replies: 69
Views: 32225

Flight Fins Finished

Flight Fins Finished Since the strength testing showed the strongest parts were printed on the SLA printer in Pro Grey, a complete set was printed. Two of the fins have slightly more travel than the other pair. I didn’t want the roll control fins to not have enough authority, so I gave them an extr...

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