P10 compass
- Thread starter Bongo1
- Start date
Ad: This forum contains affiliate links to products on Amazon and eBay. More information in Terms and rules
arc5stinson
Airman
Good Morning. Ex-Nuke worker here. The P-10 was installed in Spitfires forward of the control column. I believe it was also in Hurricanes. Image attached.
There is no problem with the Radium as long as it is contained within the device. The radiation coming from it has decayed a great deal and you can be around it without issues- even carry it in your kit if you wish. However, if one opens the device and is directly exposed to the radium paint and any radium dust that has flaked-off over the years, one runs the risk of inhaling radium particles into the lungs. This is a real danger, as a radium particle- even a tiny amount, will lodge in the lungs and bombard the same group of cells over an extended time, Each time, those cells are rolling the "cancer" dice. Devices such as this can be opened and serviced safely, but to do so requires training, equipment and planning.
In short: It is safe for you to own and handle this relic, unless you sleep with it under your pillow.
Do not open it in a way that will expose the old paint and for goodness sake, do not tell an enviro-loon or some civil authority that you have a device with radium in it.
The hysterical over-reaction as they invade your home to search-for and confiscate anything they deem "dangerous" (and the bill they send you for it) will be tragically epic.
If you cannot overcome fear of this item, please donate it to a reputable group restoring a Hurricane or a Spitfire.
Regards,
D.S.
There is no problem with the Radium as long as it is contained within the device. The radiation coming from it has decayed a great deal and you can be around it without issues- even carry it in your kit if you wish. However, if one opens the device and is directly exposed to the radium paint and any radium dust that has flaked-off over the years, one runs the risk of inhaling radium particles into the lungs. This is a real danger, as a radium particle- even a tiny amount, will lodge in the lungs and bombard the same group of cells over an extended time, Each time, those cells are rolling the "cancer" dice. Devices such as this can be opened and serviced safely, but to do so requires training, equipment and planning.
In short: It is safe for you to own and handle this relic, unless you sleep with it under your pillow.
Do not open it in a way that will expose the old paint and for goodness sake, do not tell an enviro-loon or some civil authority that you have a device with radium in it.
The hysterical over-reaction as they invade your home to search-for and confiscate anything they deem "dangerous" (and the bill they send you for it) will be tragically epic.
If you cannot overcome fear of this item, please donate it to a reputable group restoring a Hurricane or a Spitfire.
Regards,
D.S.
Attachments
Last edited:
- Thread starter
- #3
Crimea_River
Marshal
Lancaster and other large aircraft had a much larger compass. Not sure the number but I've seen both side by side and there's an obvious difference. The smaller would have been used on more aircraft than just Spitfires and Hurricanes.
Gary Petts
Airman
Hi Gary,
That looks like a nice find.
I am no expert and information on the Internet is always confusing, so I guess you have come to the right place to become even more confused
I have an interest in WWII Aircraft Memorabilia and must say I'm confused? The A.M. (Air Ministry) Reference 6A/745 I think applies to the P4A compass, which I believe went into a number of aircraft, including Lancasters.
The top clearly says "P10" but there are only two parallel lines for heading, I think the P10 had either a cross or a Tee , which I believe was designed to prevent confusion between forward and backward headings when set in the heat of battle on the earlier models.
Regardless of which model you have, you are lucky to have picked up a piece of WWII History
With regards to the Radium, i think you will find arc5stinson.38188 is spot on. Google things like "British Radium Girls" and you will see why there is so much fear around these beautiful parts of history. I think the one shown in that post is actually a P8. I cant blow up the photo any more without losing detail, but it looks like a P8 on the ring. I recently purchased one of these and the Air Ministry Reference (AM) is 6A/0.726. This mode has "AFT marked on the housing, as shown in the post. The curved lever next to AFT allows you to unlock and turn the top part to set your bearing.
I picked up a P8 recently (Spitfire and Hurricane). Because I was concerned about it, I took it to a company that services avionics. They were pleased to view it, still in a box and in perfect working order. At no charge, they ran a radiation test instrument over it (dosimeter?) and concluded there was no problem. The highest emissions came from the top, so I do not sleep with it under my pillow. The tech advised me not to lick it! (See reference to British Radium girls)
They were servicing a P8 and let me see one in pieces. They then offered me three times what I paid for mine, as it was likely to be cheaper than the restoration they were doing.
When I said it was free of charge to have it checked, they are currently going through their shed to see what other WWII treasures they can sell me for my collection!
Please put up some more photos of your compass and let us know what your research reveals,
Cheers, Gary
That looks like a nice find.
I am no expert and information on the Internet is always confusing, so I guess you have come to the right place to become even more confused
I have an interest in WWII Aircraft Memorabilia and must say I'm confused? The A.M. (Air Ministry) Reference 6A/745 I think applies to the P4A compass, which I believe went into a number of aircraft, including Lancasters.
The top clearly says "P10" but there are only two parallel lines for heading, I think the P10 had either a cross or a Tee , which I believe was designed to prevent confusion between forward and backward headings when set in the heat of battle on the earlier models.
Regardless of which model you have, you are lucky to have picked up a piece of WWII History
With regards to the Radium, i think you will find arc5stinson.38188 is spot on. Google things like "British Radium Girls" and you will see why there is so much fear around these beautiful parts of history. I think the one shown in that post is actually a P8. I cant blow up the photo any more without losing detail, but it looks like a P8 on the ring. I recently purchased one of these and the Air Ministry Reference (AM) is 6A/0.726. This mode has "AFT marked on the housing, as shown in the post. The curved lever next to AFT allows you to unlock and turn the top part to set your bearing.
I picked up a P8 recently (Spitfire and Hurricane). Because I was concerned about it, I took it to a company that services avionics. They were pleased to view it, still in a box and in perfect working order. At no charge, they ran a radiation test instrument over it (dosimeter?) and concluded there was no problem. The highest emissions came from the top, so I do not sleep with it under my pillow. The tech advised me not to lick it! (See reference to British Radium girls)
They were servicing a P8 and let me see one in pieces. They then offered me three times what I paid for mine, as it was likely to be cheaper than the restoration they were doing.
When I said it was free of charge to have it checked, they are currently going through their shed to see what other WWII treasures they can sell me for my collection!
Please put up some more photos of your compass and let us know what your research reveals,
Cheers, Gary
Last edited:
MiTasol
1st Lieutenant
Congratulations
Here is the RAAF useage of both the 6a/745 (P4.A) and P-10 compasses. RAF will have been similar but with more aircraft added.
arc5stinson
Airman
Gary Petts
Airman
Thanks for sharing.
Should I say "Snap?"
Should I say "Snap?"
