On Friday, June 10, 2011 08:16:52 AM Vivian Meazza wrote:
> Hal,
>
>
>
> I've completed the T/R/REM lock, and the day/night mask - this might be
> different to your interpretation of a "dimmer" - AFAIKS its just a plate
> with big/small holes which is slid across the lamps. That required a bit of
> modification of the existing model here:
>
>
>
> ftp://abbeytheatre2.org.uk:2121/flightgear/SCR-522/TR1133-Control-Night.jpg
I didn't find too much to go on with the day/night mask/dimmer in the docs I
had before. From reading the section about this in the radio manual (page 24)
it appears that this was probably not infinitely adjustable and that having a
large hole and a small hole fits the description in the manual better although,
as you wrote, this is a matter of interpretation since the manual is not
explicit about this.
>
>
>
> All is now pushed into Git. I could add the dialog etc. to the P51D if you
> would like.
The model is very close now. I have improved the textures as well (the box and
cover plates now have a crinkle finish). I still need to add the fittings on
the bottom but these are a fairly simple cubes, cylinders and spheres type of
things (IE. very east to model) and I should have that done in the next day or
two.
I have adapted your top and light mask to the model so the new version should
work for you as well without many changes to your code. This also reduces the
number of vertices/edges so the model is a little smaller than it was.
Also the cover plates were interchangeable according to the manual. One of
these plates has the placards and the other has mounting holes and depending
on the installation these covers were interchanged so that the one without
placards could be attached to the mounting surface/bracket in the aircraft.
It appears that your installation has it mounted with what is the mounting
cover visible in the cockpit which is not correct. I have put the placards on
both side covers so that it can be mounted either way with the placards still
visible. This works fine in the P-51D and it should work in your Spit as well.
Don't bother with implementing this in the P-51D since I can look at (and
steal - is that OK?) your code. I had a look at your stuff and it did not
appear to be a big deal to port this to the SCR-522 and the P-51D. I will
try to generalize this so that it can be used by any aircraft since it could
be useful to those working on other WWII aircraft like the P-47, P-38, P-39,
P-40, Corsair, F6F, B-17 and perhaps a dozen others.
>
>
>
> I'm looking forward to the updated models - I think you did an outstanding
> job just working from photos. I don't know yet if the TR1133 had a single
> box containing the transmitter and receiver, or 2 boxes. In any case, I
> think the SCR-522 was also fitted to UK aircraft, at least later in WW2 -
> after all that was the purpose of the contract.
The radios in US and Britsh aircraft were standardized very early in the
war. There was lots of cooperation between the US and the UK particularly on
electronics (communication radios and radar) and this started before the US
was officially at war. Reading the history on these VHF radios it appears that
the initial prototypes where Britsh and that these were improved and made into
production items by companies in the US primarily Bendix.
The BC-602-A control box appears to have been used for all 4 channel VHF
radios through out the war (and into the Korean war at least in the P-51D's)
and it was basically unchanged from what it looked like as a prototype.
>
>
>
> This is a nice photo of the cockpit control:
>
>
>
> http://spitfiresite.com/wp-content/uploads/2010/07/02es09_020.jpg
There is at least one difference from the drawings in the manual. The raised
part of the top that goes over the lights is stamped into the top cover. The
drawings show this as a seperate piece that is rivited to the top cover. So
there appears to have been some minor cosmetic changes to these during thier
production life.
Also here is an ebay auction for a BC-602-A that shows more detail as it shows
three sides of the unit.
http://cgi.ebay.com/WWII-Signal-Corps-BC-602-A-Radio-Box-w-Connector-
P-51-/220792306832?pt=LH_DefaultDomain_0&hash=item33683f3c90
The one in this auction has a serial number of 8840 so this can't be a late
war unit since these had to have been produced in the tens if not hundreds of
thousands (after all it would have taken over 10,000 of these just to equip
P-51s and these were used in every plane the US and UK put in the air many of
these produced in >10,000 quantities) so it looks like the rivets on the top
cover were only on very early examples.
Hal
------------------------------------------------------------------------------
EditLive Enterprise is the world's most technically advanced content
authoring tool. Experience the power of Track Changes, Inline Image
Editing and ensure content is compliant with Accessibility Checking.
http://p.sf.net/sfu/ephox-dev2dev
_______________________________________________
Flightgear-devel mailing list
Flightgear-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/flightgear-devel
