1944 Homelite PU-4/CPN-2 Generator, info needed.

Hi, I have no idea if I'm in the right place with this, or even if I'm on the right forum, but here goes....
 
I've recently started restoring an old U.S. Army generator, as the title suggests it's a Homelite, the model designation is PU-4/CPN-2, the outputs are 27v DC & 115v AC at 400 cycles.
 
Now, I'm in the UK, I hear these old Homelite units are quite common over there in the USA, but over here they're pretty rare. I thought rather than bore you all with the details I'll just post up a few links to various resto threads on a couple of different forums & a link to my album where I keep all the pics of this project, so here goes.
 
Here's the link to the resto thread on a British forum:
http://www.stationaryengineforum.net/t5265-ww2-us-army-homelite-generating-set
 
Here's a link to my resto thread on an American forum:
http://www.smokstak.com/forum/showthread.php?t=108002
 
& here the direct link to all the pics on one Photobucket album:
http://photobucket.com/nutgonesyankgenny
 
Now, what am I after???
Well, I've already uncovered quite a bit of info on this generating set, but much of it is based on assumptions. Like the assumption that, as it produces 27v DC & 115v AC @ 400Hz, it was likely to have been used to recharge 24v batteries & run radar systems, & the assumption that this was most likely done on aircraft, especially as it has aircraft type plugs on the output(s).
 
But I would like to know for sure. I would like to know which planes these were fitted to as well. I would love to know how it ended up staying on in England after the war as well (I've heard that these were APU's & were replaced, soon after the manufacture date of this particular machine, by turbine powered units?) But this may be asking a bit too much.
 
I've seen plenty of different pictures of plenty of different Homelite generator units, but I've yet to see one which looks like this one. Sure they all look the same from the engine end, but not so much from the genny end.
 
So, does anyone know which plane this might have been fitted in??? I would love to know. Any other information would also be appreciated.
 
I'm also open to any comments on the restoration, if anyone want to add anything, tell me where they think I'm going wrong, tell me I'm doing a terrible job, even tell me I'm doing a good job, I don't mind. I just hope someone out there knows these machines & what they were used for.
 
Just as a quick note, the guy I bought it from (long time ago, but I remember this much) said they were bolted to tanks, which is why it has such a good exhaust silencer (muffler). I've never heard this engine run (but I'm hoping it won't be too long before I do) but I have used the silencer (sorry, muffler) on other engines, & it's very quiet.
I think the guy was just guessing, but who knows? (Hopefully someone reading this!).
 
Many thanks, & apologies if I'm in completely the wrong place.

Hi, I would like to say, first of all, thanks very much to all the replies so far, it's really good news & fantastic to finally find out what these units were used for.
I don't know if they were originally designed for the exact purpose or powering the SHORAN units, or weather the government just used what ever was available at the time. Judging from the rarity & lack of information I would say these units were intended solely for this purpose.
 
I've been working late into the night on this project for the last few days & have managed to get the engine started today. Unfortunately it won't run for more than a few seconds, but I think this could be due to the tiny amount of fuel in the tank. I'm going to get some more & have a try later on today.
 
But good news all round, now I know what it was used for & I know she will start (I'm sure I can make it run, it's just teething troubles).
 
Anyway, thanks again for all the help, if anyone else has anything to add I will carry on watching this topic, & continue to look round these pages.