I found the D-12 compass in the storage hangar so here it is for a fitting. It lined up nicely with the new shock mounts but I will not bolt it in quite yet as the whole Nav table still has to come back out for paint after the table top material comes in. The top gets a layer of material so the Nav can write on it and the protractor will ride smoothly.

The cover for the D-12 compass is fabricated and fit

Here is a shot of the new Mk 3 Aircraft Protractor (Navigators drafting arm) from eBay installed on the nav table along with the compass cover.

The Protractor was $25 band came new in the box. The only problem is it was for an Army contract but I found the correct Navy one and the gentleman was very kind and donated it to our worthy project. I have a special fondness for the Navigators station as my Dad was a B-29 Navigator. He and I would collect navigation gear a lot of which is going in to the Harpoon when the time is right. The Nav station will be darn full of gear just waiting for a navigator to sit down and get to work.
Interesting how the arm will stow and pivot out of the way.

The next project at the Nav station is the equipment shelf above the table. This shelf mounts the Flux Gate Compass amplifier, caging switch, master indicator and dynamotor. It also has supports for circuit breakers, controls for the instrument lights and heated suit plug. The first thing was to bend up the brackets. The lightening holes are then punched out and flanged with dies.

Then the angles are bent, clamped in place and drilled

After paint the parts are riveted together. I love the big brute rivet squeezer. It can rivet better than I can!

Best $50 I ever spent

The parts are clamped in place, leveled and then back drilled through the original holes

I had one of these original shelves for the PV-2 that I picked up at the Pima Air Museum back around 1978 or so and I dug it out. Who knows it could have been removed from our very Harpoon. Here is one of the brackets being cleaned up. The paint is in decent shape and is full of part numbers and inspector stamps so it is going to keep its original paint. It matches the rest of the interior pretty well. It's only original once

The flux gate master indicator mount also came on the old shelf I picked up at Pima 30 plus years ago but it needed some new paint.

The old shelf can be seen in the background and the new one is ready to assemble. Interesting how the shock mounts are riveted right to the wood shelf

Final assembly begins


The old master flux gate compass indicator on the left which is not bad but the one on the right is new old stock so it in goes



Gotta love the Navy anchor stamp too. Army contract parts in a Navy aircraft makes for bad juju!

Oooh the nav shelf is nearly complete

The flux gate compass amplifier still has the QA seal. So if it doesn't fire up then is should still be under warranty!

The Flux Gate Compass is a fancy magnetic compass system that has a remote transmitter out in the wing as far away from magnetic interference as possible. The magnetic compass in the remote transmitter is also gyro stabilized to prevent wandering during maneuvering. The amplifier takes the signal from the transmitter and and powers the master indicator. There is also a slave indicator for the pilots panel. Its a standard 3 1/8th instrument that is not as precise as the master. This same system was used in most all Army bombers too.
That's all for now. More tomorrow
_________________
To donate to the PV-2D project via PayPal click here
http://www.twinbeech.com/84062restoration.htmWe brought her from:

to this in 3 months:

Help us get her all the way back

All donations are tax deductible as the Stockton Field Aviation Museum is a 501c3 nonprofit organization. Tell a friend as the Harpoon needs all the help she can get.
Thank you!
Taigh Ramey
Vintage Aircraft, Stockton, California
http://www.twinbeech.com'KEEP ‘EM FLYING…FOR HISTORY!'