AirTalk.org Aviation discussions newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Hobbes Timer vs. Other Timers          AirTalk.org Forum Index -> Aviation (Students) View previous topic :: View next topic   Author Message ND Guest Posted: Tue May 18, 2004 1:44 pm    Post subject: Hobbes Timer vs. Other Timers Hi, I am having a difficult time trying to equate the units used by the timer/meter at my flying school in France to the Hobbes timer that I am used to using from my initial flight training in Canada. The meter in question is a dial with scrolling numbers (like an odometer) and a needle that marks the sub-units. So for example, the numbers could look like this pre-flight 2510.35 and post-flight 2512.40 thus giving you 2 hours and 5 minutes - very simple to use, but can anyone tell me how that translates to the Hobbes scale? Thanks. nd. Back to top EL Guest Posted: Tue May 18, 2004 2:59 pm    Post subject: Re: Hobbes Timer vs. Other Timers That's a strange one - the "hour" unit of time is pretty universal worldwide. Only thing I can think of that might be different is whether the pointer reads minutes or 100ths of hours. If it's minutes then 40-35 = 5 minutes. If hundredths then 40-35 = 3 minutes. One thing to try would be to take a stopwatch along, start and stop at same time, and compare the readings! Eric Law "ND" <diwann (AT) wanadoo (DOT) fr> wrote Quote: Hi, I am having a difficult time trying to equate the units used by the timer/meter at my flying school in France to the Hobbes timer that I am used to using from my initial flight training in Canada. The meter in question is a dial with scrolling numbers (like an odometer) and a needle that marks the sub-units. So for example, the numbers could look like this pre-flight 2510.35 and post-flight 2512.40 thus giving you 2 hours and 5 minutes - very simple to use, but can anyone tell me how that translates to the Hobbes scale? Thanks. nd. Back to top Jennifer Novak Guest Posted: Thu May 20, 2004 4:45 pm    Post subject: Re: Hobbes Timer vs. Other Timers Hobbs uses tenths of an hour. One-tenth of an hour is equal to 6 minutes. 60 divided by 10 = 6. 1 hr = 60 mins ..1 hrs = 6 mins Therefore: ..1 Hobbs = 6 mins ..2 Hobbs = 12 mins ..3 Hobbs = 18 mins and so on.... You indicate that 2510.35 to 2512.40 is equal to 2 hours and 5 mins. (which I believe, answers EL's question as to whether or not the .35 and .40 are referring to 35 and 40 minutes respectively, or to hundredths of an hour.) If it was 2 hours and 6 mins, it would be exactly equal to 2.1 on the Hobbs. Whether or not you take 2 hrs and 5 mins and round up to 2.1 or round down to 2.0 is an argument for another day. Hope that's the kind of answer you're looking for. Jennifer ND wrote: Quote: Hi, I am having a difficult time trying to equate the units used by the timer/meter at my flying school in France to the Hobbes timer that I am used to using from my initial flight training in Canada. The meter in question is a dial with scrolling numbers (like an odometer) and a needle that marks the sub-units. So for example, the numbers could look like this pre-flight 2510.35 and post-flight 2512.40 thus giving you 2 hours and 5 minutes - very simple to use, but can anyone tell me how that translates to the Hobbes scale? Thanks. nd. Back to top ND Guest Posted: Fri May 21, 2004 9:34 am    Post subject: Re: Hobbes Timer vs. Other Timers Thanks a lot for that - yes, it does put things into a workable perspective. Much easier for me to maintain my logbook with one set of consistent units. nd. "Jennifer Novak" <jennifer.novakNO-SPAM (AT) stanford (DOT) edu> wrote Quote: Hobbs uses tenths of an hour. One-tenth of an hour is equal to 6 minutes. 60 divided by 10 = 6. 1 hr = 60 mins .1 hrs = 6 mins Therefore: .1 Hobbs = 6 mins .2 Hobbs = 12 mins .3 Hobbs = 18 mins and so on.... You indicate that 2510.35 to 2512.40 is equal to 2 hours and 5 mins. (which I believe, answers EL's question as to whether or not the .35 and .40 are referring to 35 and 40 minutes respectively, or to hundredths of an hour.) If it was 2 hours and 6 mins, it would be exactly equal to 2.1 on the Hobbs. Whether or not you take 2 hrs and 5 mins and round up to 2.1 or round down to 2.0 is an argument for another day. Hope that's the kind of answer you're looking for. Jennifer ND wrote: Hi, I am having a difficult time trying to equate the units used by the timer/meter at my flying school in France to the Hobbes timer that I am used to using from my initial flight training in Canada. The meter in question is a dial with scrolling numbers (like an odometer) and a needle that marks the sub-units. So for example, the numbers could look like this pre-flight 2510.35 and post-flight 2512.40 thus giving you 2 hours and 5 minutes - very simple to use, but can anyone tell me how that translates to the Hobbes scale? Thanks. nd. 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