burning question - HSI?

[AndyT]

As long as I'm dreaming, the Cessna would be for work and this baby http://www.tecnamaircraft.com/BrP2006T.pdf is for pleasure. In the meantime, I'll be happy with a BK style version.

[ruprecht]

Well if we're dreaming, I see you and raise you this: http://www.avtechgroup.com/

[AndyT]

Yep. Saw that one too. They discontinued work on it for lack of money. Too bad. It was scheduled to be only 3.2 mil each.

[AndyT]

At any rate, I'd like to see the new 3Ds of what we have so far.

[ruprecht]

Been flying tonight mate, no 3ds work. Showed my brother how to fly the Kai Tak checkerboard IGS in a Baron Love that same-cockpit multiplayer!

[P1IC]

Thanks for the welcome! Actually I haven't drawn out my thoughts for the CDI yet - and I can't do it right now, since I'm moving house, and today is the day I de-commission my computers! Sucks.

However, just so that you know I'm not all full of BS, I've attached three images of my altimeter design, hopefully showing how I have arranged for the opto indexing.

Once I'm settled in my new home and paid an arm and a leg and the sale of my firstborn to pay for satellite internet access, I'll get on to the CDI thoughts I have, and try to explain it visually.

But knowing the speed at which you guys work, you'll have finished the project by then!

(I haven't uploaded attachments to this forum before - I hope it works!)

[cscotthendry]

P1IC:
Love the idea with the worm gears. I worked this out just a few days ago and realized that you can get really high ratios with very small gears. BTW for 48TPI gears, a 1.75mm pitch thread is your friend. Fits exactly.

Oops looks like I put the cat amongst the pigeons mentioning money, LOL

[AndyT]

By the way, for our readers who do not know what 'The Book' is, here is the link to it.

http://www.mikesflightdeck.com/mfdbooks.htm

(Hey Mike, That'll be a dollar for the advert. LOL )

[ruprecht]

Tasks for modelling this evening:

- reduce gear thickness to 1.4mm
- expand divider plate thicknesses to 1.2mm
- position optos
- adjust shafts, support gears and driver gears to suit
- check plate dimensions are 3.24" not 3" (we might have more room than we think!)
- model the CRS needle affixed to the CDI plate

Anything else, please advise before tonight. Also please advise: what thickness should the divider plates be? I'm working on 1.2mm (18 gauge) as that's commonly available in hobby/electronics stores here.

[AndyT]

Don't forget the thickness of the outer casing.
Actually, I would use 1.5 mm gears just because.
18 gauge is fine for the divider plates.