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Altitude sucks, at least when it's above sea level

Extreme Speed Prop Planes Discuss the need for speed with fast prop planes (Screamin Demon, Diamond Dust, Shrikes or any REAL sound breakin'''' plane)

Altitude sucks, at least when it's above sea level

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Old 08-05-2003, 04:44 PM
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LGM Graphix
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Default Altitude sucks, at least when it's above sea level

So, this past weekend, I go out with the magnum (no I didn't break it) and I have 2 perfect flights. Second flight I didn't get the engine shut down quick enough and broke my last 9x7 prop, no big deal, I was wanting to change to the 8x8 anyway. Well, I was only getting about 15,500 on the 9x7 which seemed weird to me, but whatever, the airplane flew good. I put the 8x8 on (stock header length still) and got 18,900. I figured GREAT!!!!!

I'm at 2900ft above sea level. The flight was awesome, but man did the launch ever SUCK!!!!!! It was given a good hard toss, and came within inches of the ground, it seemed to take forever to get that prop to bite the air.

I'm hoping to hit around 20,500 or 21,000 when I shorten the pipe, hopefully that will help, but I'm a little concerned because I have my whiplash ready to go with a West .50 on it with the 8x8 as well, and it's heavier than the magnum, however it also has alot more area than a magnum (and more of an actual airfoil hehehe)

Anyone think I'll have issues with the Whip? The magnum isn't as huge of a concern as it's $300 with engine and pipe, but the whip's are fairly pricy for what they are, not that I'm so concerned about destroying an all kevlar plane on launch, but I'm tired of breaking props LOL!!!!!
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Old 08-05-2003, 05:07 PM
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Default Altitude sucks, at least when it's above sea level

I'm at 3250' ASL here and launch the Whip without any trouble.

This pic was taken when the temp was over 100F, no telling what the density altitude was that day!
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Old 08-05-2003, 05:38 PM
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LGM Graphix
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Default Altitude sucks, at least when it's above sea level

You've got a fairly big prop on that 65 though don't ya?
I'm not to worried, just curious more than anything

Jeremy
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Old 08-05-2003, 05:59 PM
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Default Altitude sucks, at least when it's above sea level

9" diameter...
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Old 08-05-2003, 08:47 PM
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Default whip

Theres always the whiplash launcher that allows you to take off perfectly everytime.
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Old 08-06-2003, 01:20 AM
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Default Altitude sucks, at least when it's above sea level

I'm not sure but I think I did read some where that the launch was a little low with the 8/8 on the magnum but when she unloads watch out.
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Old 08-06-2003, 02:36 AM
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Default Altitude sucks, at least when it's above sea level

...but then again, you should reach higher speeds because there's just less air to "push aside".... or does the decrease in engine performance compensate for that... I don't know cause I fly at about 300 ft ASL...
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