Handy 10% Rules of Thumb

[AndyG]

Handy to remember when conditions change.

When taking off on grass add 10% to your take off roll

When taking off on a wet surface add 10% to your take off roll.

For every kt of tailwind add 10% to your take off roll.

For every 1deg degree above ISA add 100feet density altitude.

Seems like basics but handy to remember on tight or strange fields.

[nicow]

Thanks.