Performance Specs???

[mhorowit]

Now that I've scared myself twice by taking off with full fuel and two people when it's hot, has anyone seen a chart that relates density altitude to take-off roll and climb to 50 feet? - Mike

[VictorBravo]

Re: Performance Specs???

Yes. The chart shows that on a hot day, with two aboard and full fuel, the 65 horsepower Taylorcraft will indeed climb out and clear a three inch blade of grass in 3000 linear feet of takeoff roll.

[mhorowit]

Re: Performance Specs???

but it's important to get the tailwheel up first! - Mike

[Acroeric]

Re: Performance Specs???

No chart will ever tell you that. . . . there are way too many variables- like height of grass, technique, prop type and pitch, CG, etc. Most all charts were developed in best case scenarios using very qualified test pilots. Nothing will substitute for time in the aircraft and feel that you gain during times with performance to spare. I know when I start my takeoff roll if things are ok. I would recommend keeping some weight and runway length in reserve. They are amazing machines but like anything have their limits.

[mhorowit]

Re: Performance Specs???

OK - here's what I was looking for a Koch Chart .
shows how a change in Temp or altitude effects take-off.

Since it is already taking the temp. into effect I apparently do not need to take density altitude into effect.

Yep, tall grass and goats would also have an effect on the take-off roll.


Now if I can find the normal TO roll for a Tcraft (65 hp) at gross... . - Mike

[mhorowit]

Re: Performance Specs???

No chart will ever tell you that. . . . there are way too many variables- like height of grass, technique, prop type and pitch, CG, etc. Most all charts were developed in best case scenarios using very qualified test pilots. Nothing will substitute for time in the aircraft and feel that you gain during times with performance to spare. I know when I start my takeoff roll if things are ok. I would recommend keeping some weight and runway length in reserve. They are amazing machines but like anything have their limits.

Eric - I worked with Tom Richards this weekend - he's the manager of the airstrip I hope to relocate to; we took time to admire his new part (aircraft, that is). Thanks for helping him out - Mike

[birdlegs]

Re: Performance Specs???

I seem to have encountered some, but would like to point out that they are referenced at; sea level, standard barometrics@59 f. So....... in order to remain in the gene pool I begin to subtract percentile's from usefull loading.
Note; also that Temperature plays a strong suit in the formula, nearly equal I think, to elevation . And If you have both; temp. and Alt. useful load vanishes quickly. My last home field elevation was 4141 msl there @ BNO
and summer flying with 90 or so degrees made for a certain feel.......
And that ain't no typo, its four thousand one hundred and fourty one feet mean sea level.
Shawn Coleman can add some to this thread if he's still there in Ontario Or.
how 'bout it Shawn? This is a real good safety topic...

[birdlegs]

Re: Performance Specs???

So...... it looks something like ; that 350 ft. take off roll @ 100f. @6000ft.msl will instead become say 900 feet of roll and a blistering 255fpm climb rate? Might need a dry lake bed w/ say 20 square miles for my comfort zone.

[mhorowit]

Re: Performance Specs???

So...... it looks something like ; that 350 ft. take off roll @ 100f. @6000ft.msl will instead become say 900 feet of roll and a blistering 255fpm climb rate? Might need a dry lake bed w/ say 20 square miles for my comfort zone.

don't know how things are out your way, but with this humidity and 95^F. just thinking about working outside makes you soaking wet. Helped a guy using a backhoe and auger to drill for footings this weekend; headed for the shade after 1 hour - MIke

[Yellow Duck]

Re: Performance Specs???

Here in South Louisiana with 100 deg days and 90% hum.Unless I have no obstructions and at last 2500 ft. I go solo and pick my passenger at another airport.

Does real good solo, but don't add another passenger (with 65 hp)