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Paolorange, let me wish you all the luck in this thread too :)

I find the endeavour well worth pursuing, and if I can make a suggestion: how about an inner bezel, either with 60min count-up (as is on the dash-chronos) or 60min count-down, and as a third option, 12h scale for a second time-zone.
Basicly always the same watch: case, dial, hands, colour - only the bezel-scale as the option :)

I believe that you would easily sell the minimum required quantity for production ;-)
 

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Discussion Starter · #22 · (Edited)
Yes I made thoughts for a rotating inner bazel, Navitimer style, but it's way too early and they arte just thoughts.
As I said, I designed this watch just for myself and at this stage I want to focus to make it as close as possible to my own original design that is a wristwatch version of the iconic A-13A clock.
There are some important details (crown, case back, hands..) that still need to be improved and I want first to address them before everything else. As soon as the layout will be consolidated, I want then to test it as much as I can that is to say spending some good time in the cockpit and honestly see how it performs compared to other pilot watches I have.
Then will see, but yes, apparently there are quite a lot of people asking for that so providing that everything goes OK, I should eventually make a cost analysis for a small batch....I feel like I'm putting myself in troubles :).
 

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Go, Go, Go!!!

I totally root for you and the watch - I know that you will enjoy the road ahead :)
 

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Discussion Starter · #25 ·
The new semi-matt (or semi gloss? ) hands are now installed and almost everybody likes the new configuration much more. The lesson learnt is that the color of the dial, of the hands and the glass interact together A LOT and it's very very difficult to make a reasonable forecast of the final result based on a guess.


I'm now waiting for the new crown and the new case back with much deeper engraving.
Apparently ETA is not selling to individuals the AcuDrive version of it's 251.264, so I have to remove from the back the text "Thermocompensated Quartz" and replace that with ETA 251.264 Quartz. Does it make any sense to you?
 

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The new semi-matt (or semi gloss? ) hands are now installed and almost everybody likes the new configuration much more. The lesson learnt is that the color of the dial, of the hands and the glass interact together A LOT and it's very very difficult to make a reasonable forecast of the final result based on a guess.


I'm now waiting for the new crown and the new case back with much deeper engraving.
Apparently ETA is not selling to individuals the AcuDrive version of it's 251.264, so I have to remove from the back the text "Thermocompensated Quartz" and replace that with ETA 251.264 Quartz. Does it make any sense to you?
Looks great!
Where or how did you get that dial printed?
Love the stealth Pilot watch writing
Dirk
 

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Omega might not take it badly but the Alpha watch company might. :)

Alpha Watch

Chad
Alpha's probably too busy selling poorly made copies with fake COSC certification to have bothered to file a trademark in the EU...

However, since it's a one-off and not for commercial sale, there's not much a trademark holder can do anyway. Obligatory IANAL.

Beautiful watch, by the way. :)
 

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An airfoil would probably be unique, and you'd have to be an aeronautical engineer or aviation history nerd to get it, which is cool... But, frankly, i think if you want the alpha symbol you should go for it. It's your project, make it perfect for you.


Sent from an over-caffeinated state via Tapatalk.
 

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Phenomenal build! Thanks for sharing and I will echo the sentiments in the thread that I would wear that in a heartbeat. Excellent work!
 
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Great work!!. Suscribed to this thread. Go for a Kickstarter campaing!!!!
 

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Looking good. Although I dont fully understand the function of the chrono pushers. I also dont know why it needs to be lemania to be perfect pilot watch. But thats me.
 

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Looking good. Although I dont fully understand the function of the chrono pushers. I also dont know why it needs to be lemania to be perfect pilot watch. But thats me.
If i understand it well, is it a chrono that only counts minutes with its chrono hand?
 

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Discussion Starter · #39 ·
The watch displays current time in hours and minutes while chrono shows only minutes and seconds.

However let me very briefly address the excellent Diablogt’s comments.
First of all a pilot watch is a navigation tool and the panel clock A-13A has been designed to fulfill this basic requirement. Even if today everybody relies on GPS, inertial platform, radio navigation etc., the principles of basic, low level, VFR navigation are fundamental for any pilot. Let me also say that this type of “basic” navigation is actually a kind of art since the pilot has to calculate, estimate, check the progress of his/her navigation based only on the “estimated” information provided by map, speed, time and heading. That means that the minimum assets for aircraft navigation are a map, a compass, an airspeed indicator and, of course, a watch.

Books have been written on the art of the estimated navigation, but in an oversimplified way it works like this. Have a look of the photo below.



You split your route from the departure to destination in several legs. Each leg, like the one above, begins and ends with turning point (in my case a small city and the conjunction of 2 big rivers). Then, given your estimated ground speed, you divide the leg in minutes of flight, one notch per minute. A smart move is then writing close to the leg its the magnetic course (238°).

In flight, as soon as you reach the initial turning point of that specific leg, you start your chrono and set your airplane heading for 238°. Ideally your route on the ground will be as per the leg you drew on the map:
After 4 minutes you will have the small city of Lodi on your right and you will be just crossing a small railway,
After 5 minutes you will cross a large highway
After 6 minutes you should see the small airfield of Borghetto on the left
After 9 minutes and half you will be crossing another railway headed to Pavia
And finally 11 minutes after leaving the initial turning point you will be at the two rivers intersection ready to stop your chrono, set the new route to the next turning point and start your chrono again.

All the above observations will of course keep you on your route, but will also provide you information on the influence of the wind and on your navigation errors so that you can compensate their effects. Basically while flying you compare your actual position with the theoretical position you should be at that time of the flight and, if required, you make adjustment.

It's a back and forth process and as you can see reading your chrono minutes is fundamental. That's the reason why the hand of the minutes is so important. In flight you monitor your watches much as much as your heading, your speed and you map. So, like anything else in the cockpit, you need that unmistakable clear and error proof.

The purpose of the following photo is to compare how the same elapsed time looks in a central minute watch and in two of the most exquisite pilot watches equipped with the minute chrono sub dial.



It’s interesting to report here another application of the central minute hand aircraft clock: the dash board clock used of rally competition in the sixties and seventies.



It looks like rally pilots came to the same conclusions..

And sorry for my English.
 

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Very nice design! I love the concept. I find inset chronograph dials slow to read when flying, having the chronograph minutes counter central would be great.

I hope you offer these for sale.
 
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