Dead Reckoning Computers

[Herc-u-lease]

Hello All,

Does anyone have pictures of Mk4 or Mk5 dead reckoning computers they would be willing to share? It would help me out a great deal. Happy to PM if required.

With thanks

H

[Stuff]

There's any number of images of them on Google.

http://www.rekeninstrumenten.nl/pages%20and%20pictures/17421.jpg

[david parry]

Ha! Ha! RAS To TAS, where is my red chinagraph to put on the wind speed and direction;)

[unclenelli]

H-u-L
Check your PM's
I may be able to help

[CoffmanStarter]

Excuse me for asking but are CDR's still issued and are students taught how to use the good old Wiz Wheel ?

[Sloppy Link]

Probably can find one you can have, PM me. Still use the whizz wheel for time/distance and fuel calcs.

[yotty]

Come on Herc, it's "ded" as in deduced! Not dead!:eek:

[barnstormer1968]

It says dead on the pic of the actual item above :)

[yotty]

Must be right then! ;)

[MAD Boom]

Coffman,

As a Wiz-wheel fan, I'm happy to see it is still being taught on Multi Engine groundschool at Cranwell.

[Courtney Mil]

Still taught? I should say so!

http://flightcomputer.net/wp-content/uploads/2011/10/StarTrek-FlightComputer.jpg

[CoffmanStarter]

Well played Courtney :D:D:D:D

Not much drift at Warp Speed 8 though !

[ABL262]

Can anybody explain the differences between the Mk4, 4A, 5, 5A, etc CDRs? Also, which version is current issue for Nav training during EFTS on the Tutor and does anybody out there have one available to purchase or in return for a donation to RAFBF?

All help much appreciated.

ABL262

[Courtney Mil]

Interesting, though, that EVERYONE adopts the same facial expression when using one, Coff.

[Roadster280]

I've got a "lite" version of this on my watch. Very useful for quick currency conversions and the like. It wasn't a learning curve, more of a learning wall. Once you've climbed the wall, it's easy as pie. If you don't get the thing to begin with, it may as well be in Chinese.

[99 Change Hands]

Outstanding photo Courtney, I want to have your babies. :D

[Dg800]

Not much drift at Warp Speed 8 though !

Never underestimate the strength of those interstellar winds! :ok:

[Motleycallsign]

I hope it was a solar powered one.

[Mach2]

No, these 'dead reckoning computers' are no longer issued to EFT studes, nor are they taught how to use one - although there is still an enormous model of one (about 7 ft high!) tucked away in one of the store rooms:)

[CoffmanStarter]

Mach2 ... That's sad ... IMHO the CDR is the most visual/practical way to demonstrate the Triangle of Velocities. So how is Pilot Nav now taught to EFT studes ? :ok:

[LateArmLive]

Pilot nav is probably still taught in the same fashion at EFT, but the use of the CDR is (I would assume) not necessary in the days of aircraft with computers.

In my relatively short 15 or so years in the RAF I have never seen one of these CDRs in use, nor have I been taught how to use one at groundschool (and I've been on lots of groundschools...)

MDR is the way forward, for anything more precise you can ask Google ;)

[Charlie Time]

Still used on the fleet I fly in. Computers are great but, even with dual redundancy, can still fail. Also a great planning aid if you don't have the luxury of a reliable MPS - how else are you going to work out a complex PNR or ROA between 2 moving bases?

[Tinribs]

DR computers may be bought through any of the pilot type magazines. The civi ones such as ATRP5 are entirely plastic while the service have some metal alloy components.

The differences for the marks are; full size high and low speed for jets and helicopters. The half size version is for fast jets because it is easier to stow and less of an inteference when in use

Early models had a nice brown canvas cover which was replaced later by a tatty plastic version

[Geehovah]

I had to dust off my original 70s version to get through my PPL re qualification

The worrying thing is it all came flooding back.

[Courtney Mil]

Yes, Geehovah, but your book has proved that you have something of a memory. Remembering how to use a Dalton Comp is slightly bordering on worrying.

[MightyGem]

The half size version is for fast jets because it is easier to stow and less of an inteference when in use
I just photocopied the sliding scale and then cut it down to just fit in the computer. Good enough for pootling around at 120kts.

[Herc-u-lease]

Chaps,

Thank you for the replies, some useful stuff there. I'll be in touch shortly.

Thanks

H