"tman" inv@lid wrote in message
news
Flown C172's for quite a while, and never had anybody in the back.
Now I'm planning on quite a trip, with 2 pax and luggage.

When I fill the fuel to the *tabs*, calc everyone's weight honestly and
consider baggage -- I'm 75 lbs over the 2450 gross on departure. Maybe
100 over gross if I assume a "lie about weight" factor or some inaccuracy
with filling the tanks. Now I'm scratching my head about just how risky
this is. I know (others) have pushed over gross in these planes way more
under worse conditions, and have almost always gotten away with it. I'm
inclined to just do it, and be cognizant that it will perform differently,
i.e. don't expect the same picture on climbout that you would when solo.

Risky? Or just roundoff error on the weight? Here are some other
factors:

This is the 160HP C172, standard.
Departure runway is 5000'.
No steep terrain to climb out of.
Plenty of alternates along with the way with 3000 runways.
Not particularly hot, humid, or high. 50 degrees at 1000 MSL for
departure or any point of landing.

I'm figuring I'm 3% over gross, causing most of my V speeds to increase
1.5%, so say -- instead of flying short final at 65 knots, I'd fly at 66
knots... OK wait I can't hold airspeed to +/- 1 knot on most days anyways.

I'm thinking through many of the factors, and it is only a "little" over
gross, only on the first hour or so of the trip. What else should I be
aware of? Am I dangerous?

T

Unless your working with a over gross authority and a special airworthyness
certificate then keep it legal and stay within gross limits.

Other wise cessna 172's fly good 30% over if you have a long run way and
healthy engine and good cool temps.

As for Speeds that a hit amd miss each airplane is diffrent when over gross.

Am I dangerous? if you have not been properly instructed on flying over
weight aircraft the answer is yes.