Altitude Records Online

Discussions on high/extreme altitude and mach busting rockets.

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Re: Altitude Records Online

Postby PK » Thu Apr 26, 2012 7:42 pm


makeit
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Re: Altitude Records Online

Postby makeit » Thu Apr 26, 2012 8:11 pm

Wicked!! :D Thanks PK, Your reputation holds true.
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Re: Altitude Records Online

Postby Space Mark » Thu Apr 26, 2012 8:41 pm

If you're using OpenRocket, put a "Mass Component" in the nosecone of your rocket (no weight needed) and then go to Analyze -> Rocket Optimisation.

Now expand out the Nose cone -> Mass component and select "Mass" in the "Available parameters:" tree view. Click the Add button. Because you started with 0, and 0*anything = 0, you need you set the maximum. Go for something crazy to start with like double your rockets total weight.

Make sure "Optimised value" in the optimisation settings is Apogee altitude, then click "Start Optimisation".

A rocket i had prepared earlier suggested 93.3grams of weight would be excellent to gain altitude.
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Forbury
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Re: Altitude Records Online

Postby Forbury » Thu Apr 26, 2012 9:06 pm

Thanks for that information, nice way to tweek a rocket.

I added some weight to the nose cone where the payload is (in the open rocket), and the altitude did increase by 10 to 15%. I did however notice the speed decreased.

I have done several simulations with various motors and found some will go up to mach 1.3, to 1000m, here im not going for altitude but speed.

Another simulation is just for height, at 1300m which there is some speed sacrifice.

This following topic is for the info posted here. viewtopic.php?f=56&t=3599
GTF Aerospace

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Re: Altitude Records Online

Postby Space Mark » Fri Apr 27, 2012 1:14 am

Exactly right Forbury, as PK explained, its a tradeoff :)
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Re: Altitude Records Online

Postby PK » Fri Apr 27, 2012 8:03 am

Speed is easy. Minimum diameter, Minimum mass, minimum fin size, minimum length. In that order.
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Re: Altitude Records Online

Postby cryoscum » Fri Apr 27, 2012 10:03 am

AMRS L3 | NAR L3 | QRS 089 | MDRA 224
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Total impulse for 2016: 32,458 Ns (thus far)
Total impulse for 2015: 84,231 Ns
Total impulse for 2014: 40,757 Ns
Total impulse for 2013: 62,927 Ns

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Re: Altitude Records Online

Postby october sky » Fri Apr 27, 2012 1:25 pm

PK = Sheldon ! :wink: And PK, no comments about the waistline.... :P

For a dumb A.. like myself, I feel like the 'ol Maxwell Smart when the boss explained to him his assignment....did you get that Max....I lost you after "Now Max...." Many of you would remember this, specially the "oldies". :lol:
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ogivemeahome
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Re: Altitude Records Online

Postby ogivemeahome » Fri Apr 27, 2012 10:32 pm

A smooth sea never made a skilled mariner. (English Proverb)

Forbury
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Re: Altitude Records Online

Postby Forbury » Sat May 19, 2012 6:06 pm

Launch on 6th may went well, got a D12-5 to about 1500 ft, and also lost the dam rocket.
Now rebuilding the same rocket, and going for the E30-7, and F72 record with onboard altimeter. Will post with results.
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Re: Altitude Records Online

Postby Rockoon » Sat May 19, 2012 10:41 pm

That's rotten luck Forbury :x . I hope you didn't lose an altimeter in the process.
Was it too windy when you launched?
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Re: Altitude Records Online

Postby ogivemeahome » Thu Jun 28, 2012 8:01 am

Rockoon, I've submitted a claim form for the 'Frisky Frog'.
(see thread here):
Please disregard the 'staged' submission (oops). :?
I delayed submitting due to doubts about validity - can the reading be trusted?
Opinions welcome.

Thanks.
A smooth sea never made a skilled mariner. (English Proverb)

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Re: Altitude Records Online

Postby Rockoon » Sat Jun 30, 2012 10:59 am

:D I have your rocket posted now. Sorry for the delay between responses. It's been so busy round here lately.
And for a A8 to hit over 500' is quite hard to do really.
In our neck of the woods in Canada, I can't ever remember seeing a 5 delay A in stores here. Just a 3 :roll:
So, can it take a B motor you think? Curious to see what it could do in another motor class.
Let's see...FYI. I have a U.K. rocket record of 975' on a B6-6. It does sound reachable mate.

Anyways, good luck on your next attempt.
Cheers
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ogivemeahome
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Re: Altitude Records Online

Postby ogivemeahome » Sat Jun 30, 2012 1:11 pm

A smooth sea never made a skilled mariner. (English Proverb)

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Re: Altitude Records Online

Postby Lister » Tue Oct 27, 2015 11:05 am

Is there a current aussie list of altitude records that I can see.. have been working on a couole of designs and would like to add my name to the list 8)


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