"Rules of Thumb"
 

Thought this might be interesting and a bit useful. what rules of thumb do you use or know.

Is it legal...? And is it safe..!

Double your throttle, double your trouble...

OK... start with the simple ones ;) Bank angle required for a rate one turn 7+(IAS/10)

-2Donkeys

Rate o' descent req'........1/2 i.a.s
(Ball park for slipping down ils)
or 5x g.s,or autopilot armed

[This message has been edited by 3 putt (edited 29 March 2001).]

This was asked about 2 months ago and one of the interesting urls was:

http://www.flightinfo.com/html/rules_.shtm

Have a look at Thumb Rules from Dunnunder & Godzone

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Tech Log forum moderator

One cup rice, two cups water...

Required rate of climb against climb gradient. Gradient x groundspeed = Required rate of climb.
Ex. 6.6 x 120 = 790 fpm.

No wazzing when the boss is looking.

Oh, and max drift = wind speed / groundspeed in n.m. per minute.

[This message has been edited by ShyTorque (edited 02 April 2001).]

top of descent point- (flightlevel x 3) + 10 miles. eg FL350, (35x3)+10 = 115 miles.
B747 fuel requirements- estimated flight time to destination x 12 (-100), 11 (-200/300), 10 (-400) + your diversion requirement + 2500kg taxi/APU allowance.
These always work out to within a % or so of the computer generated plans value. Nice to know!

If not at half take-off speed by 1/3 of runway length start worrying. If not airborne by 2/3 runway length, abort.

Always assume that anybody flying a Piper or Cessna can't see you.

Never assume that you'll be given anything better than a FIS, no matter how much you beg.

Any aircraft designed in the USA will need the wing re-inforcing for UK approval.

Any aircraft designed in France will need the flying controls strengthening before UK approval.

Any aircraft designed in Germany will need to lose about 30kg before UK approval.

Any military customer will move the goalposts at least once every 2 months before completion of the project.

G

Remember Green Aircraft get priority at Dublin!

Another descent one which factors in groundspeed...

Observe groundspeed, add a '0' then half it, this figure becomes your VS for the descent which is commenced at a distance from destination of 3x height:

eg. 23,000' at 400 kts G/S = A descent rate of 2000 fpm commenced at 69 nm from destination. Remember to adjust VS for any increase in G/S during descent, and factor in a few miles to slow down at the end.

Number of bars on sleeve times seniority times aircraft weight times MSF (*) devided by number of wives square rootet by number of children is "what he takes home"

*MSF: Management Suckup Factor

A real rule of thumb :

On a half-mil chart, your thumb measures roughly 10nm.

It easily follows that a thumb is 5nm on a quarter-mil, and 1nm on a 50thou.

Fairy, Big Hands, havn´t you http://www.pprune.org/ubb/NonCGI/tongue.gif

- The longer the logbook entry, the simpler the fault.

- If it ain´t f¤%%&d, don´t fix it

- If it works, it´s not allowed

- If it´s grumpy, argumentative and rude, It´s your freindly ground engineer.

Sorry, I´m not a pilot, so I thought I would contribute some from the dark side.
Brgds
Doc

Bus journeys from the airport to hotel are measures in "Beiraes" (pronounced "beers"). A one beirai journey is about 12-15 mins, a two beiraes trip 25-35 mins and I don't know of any 3 beiraes journeys due to BALPA regs on our distance from slip hotels.

A two beiraes trip on a weekday evening can be equivalent to a one beirai on a Sunday.

Once day I'll fathom it out and post the exact conversion for beiraes > minutes > kilometres here on PPRuNe.

Rod

[This message has been edited by EDDNR (edited 07 April 2001).]

If your hat blows off, its too windy to fly.

Descent planning III:

When performing a CDA, ATC gives you "Trackmiles" to go:

groudspeed : 60 = X,
trackmiles : X = Y,
current altitude : Y = descent rate.

For example, assume a groundspeed of 360 kts at FL150 and you have 30 NM till touchdown;

360 kts : 60 = 6 NM/min,
30 NM : 6 Nm/min = 10 min,
FL150 : 10min = 1500 fpm.

(Adjust for changes in groundspeed off course)

Start your rollout half of your bank angle before your desired heading.
Start your level off ten percent of your roc/rod before your desired altitude.
Halve your groundspeed then multiply by ten for a good rod on the ILS.
Very quiet passengers are sick, scared, sleeping or dead.