Logging hours
Thread Starter
Joined: Jan 2001
Posts: 456
Likes: 0
From: Between Galaxies
Logging hours
Hey - just a quick question.
Flying the other week, my instructor logged the hours flown in 1.6, 1.3 etc. and I usually do it as 1 hour 5 mins etc.
Could someone explain the conversion in simpleton words please....
cheers
Ian
Flying the other week, my instructor logged the hours flown in 1.6, 1.3 etc. and I usually do it as 1 hour 5 mins etc.
Could someone explain the conversion in simpleton words please....
cheers
Ian
Joined: Jun 2003
Posts: 13,787
Likes: 0
From: EuroGA.org
This is one of those questions that will generate as many answers as there are people 
I think the origin of the "1.3" method is from writing down the tacho/hobbs time. It is very common.
If you own your own plane and look after the maintenance, and use the CAA logbooks, they have columns for "hours" and "minutes" in which case you may prefer to log your flying time as say 1:25 (1hr 25 mins) also.
Obviously the 1st method is easier to add up. The second one is harder unless you have a hh:mm calculator or a spreadsheet whose cells can be formatted to hh:mm...
Otherwise, it is of no consequence.
I think the origin of the "1.3" method is from writing down the tacho/hobbs time. It is very common.
If you own your own plane and look after the maintenance, and use the CAA logbooks, they have columns for "hours" and "minutes" in which case you may prefer to log your flying time as say 1:25 (1hr 25 mins) also.
Obviously the 1st method is easier to add up. The second one is harder unless you have a hh:mm calculator or a spreadsheet whose cells can be formatted to hh:mm...
Otherwise, it is of no consequence.
Joined: Aug 2004
Posts: 136
Likes: 0
From: Leeds
I log my hours in 1.3, 1.8 etc too. Not sure if this is mandatory ??
Anyway, the converstion is as follows.....
Number of minutes / 60
eg 1 hr 38 mins would be 1 + (38/60) = 1.63
to do it other way round, just x by 60,
eg 1.63 would be 1 + (.63x60) = 1 hr 38 mins
Anyway, the converstion is as follows.....
Number of minutes / 60
eg 1 hr 38 mins would be 1 + (38/60) = 1.63
to do it other way round, just x by 60,
eg 1.63 would be 1 + (.63x60) = 1 hr 38 mins
Joined: Oct 2004
Posts: 6,626
Likes: 12
From: UK
6 minutes = 0.1 hour
Either log in 5 minute chunks or 6 minute chunks. Anything more accurate is a total waste of time and effort.
After years of logging minutes and trying to find calculators that work in minutes I gave up, and find decimal much simpler.
Its your choice.
Either log in 5 minute chunks or 6 minute chunks. Anything more accurate is a total waste of time and effort.
After years of logging minutes and trying to find calculators that work in minutes I gave up, and find decimal much simpler.
Its your choice.
Joined: Jan 2004
Posts: 3,247
Likes: 203
From: Here and there
Swedish rounding is the system traditionally used, which means you round UP when it is half way between. There is a more accurate system that requires you to round up half the time and round down half the time. However, using the swedish rounding,
1:15 equals 1.3
And for a semi-official view on the matter, the front of my Airservices Australia logbook says this:
mins = hours
0-2 = 0.0
3-8 = 0.1
9-14 = 0.2
15-20 = 0.3
21-26 = 0.4
27-32 = 0.5
33-38 = 0.6
39-44 = 0.7
45-50 = 0.8
51-56 = 0.9
57-60 = 1.0
As always, YMMV.
1:15 equals 1.3
And for a semi-official view on the matter, the front of my Airservices Australia logbook says this:
mins = hours
0-2 = 0.0
3-8 = 0.1
9-14 = 0.2
15-20 = 0.3
21-26 = 0.4
27-32 = 0.5
33-38 = 0.6
39-44 = 0.7
45-50 = 0.8
51-56 = 0.9
57-60 = 1.0
As always, YMMV.
Why do it if it's not fun?
Joined: Jul 2001
Posts: 4,782
Likes: 12
From: Bournemouth
The school where I did my PPL used to log time to the nearest 5 minutes, but charge decimal time. They had a conversiont table they used, which, off the top of my head, went something like:
05 min = .1
10 min = .2
15 min = .3
20 min = .3
25 min = .4
30 min = .5
35 min = .6
40 min = .7
45 min = .7
50 min = .8
55 min = .9
I think the main thing to take from this thread, though, is that there are so many different ways of converting - but at the end of the day no one really cares so long as it is roughly right.
FFF
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05 min = .1
10 min = .2
15 min = .3
20 min = .3
25 min = .4
30 min = .5
35 min = .6
40 min = .7
45 min = .7
50 min = .8
55 min = .9
I think the main thing to take from this thread, though, is that there are so many different ways of converting - but at the end of the day no one really cares so long as it is roughly right.
FFF
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