very true, David Burke has hit the nail on the head. All your repsonsibilities are available in black and white on line

Individually they can be very harmful! As such they are controlled, quite rightly. In their prime, such Radon222 instruments were not a problem, since the glass, seals and paint were in good condition. The glass stopped all of the Alpha emissions, while what little Beta emission escaped, has a small enough wavelength that it wasn’t a problem.

The dosage, stood infront of it is not the issue, that is less than your yearly exposure in most cases.The issue is that some of the instruments are 70 years old, seals have perished, glass is cracked, and the painted Radon pigment has broken down into dust and fragments. Airborne Alpha and Beta contamination from the decay chain and hence inhalation is real. The very short half life products in the decay chain are frivelous, and an inhalation risk. for instance, Polonium is one of the decay daughters, the same Polonium that killed the Russian diplomat from inhalation exposure, within 3 months, it’s a huge alpha emitter that kills tissue cells in hours once inhaled. If the instrument is in poor condition, I wouldn’t mess with it.

Seriously, dont mess with them.

I wouldnt even consider buying and shipping them if they are Radon instruments. They are all at leasy 60 years old

PS nit just gamma detectors, they can pick up Alpha and Beta nowadays too. Gamma sticks out a mile.

Ah – there’s a question.

Personally, I don’t believe that individually, they are particularly harmful. I wouldn’t want to sleep with one under my pillow; nor would I want to own them in huge quantity (I don’t by the way; my stuff is clean!!).

However, they have been deemed as harmful – principally to the nuclear industry worker who may visit an aircraft museum, and put his dosage over the limit I suspect.

Bruce

That plan looks great, I hope GAM pull it off. Fingers crossed for them!

Everything is crossed!! Has Andy contacted you yet re prop matters etc mate? pm me if not, and I will give you his mail address 🙂

Blue and Nimchick have expressed valid concerns about the number of airframes culled. As a long time volunteer myself, it is alarming to see one third of the airframes go so quickly from a large collection. Some were always earmarked as likely to go, some others, like the Gannet not. They have sold incredibly fast, which we have all been stunned at. The interest has been unprecedented.Obviously It’s a bitter pill that no one really wants to swallow, but it is warming that many of these airframes are going to HFL, a company that actually fly aircraft!

The Victor cockpit and Jag were very close to being pots and pans, but both have been saved. No one wants to see the Gannet go, but it going to HFL makes it an easier medicine to take, hopefully it has a very bright future ahead of it with them. It is a shock that we are losing so many, but thankfully we still have all of the most important airframes to preserve, especially the rare runners. Hopefully it will have a positive effect on our long time planning issues and we can hold onto them in a nice dry building!

we have a 100a inverter which seems to be running slow giving approximately 300 cycles and 90 volts it should be 400 cycles 115 volts can any one help with how to adjust it please.
we have a copy of AP 4343B but gives no info on adjusting the inverter but I am not convinced the copy we have is complete also any information on the type 12 control panel would help also.
Thanks in advance.

I dont think you will adjust that out on the Carbon pile, its too large. Your have a deeper problem there if the frequency and voltage are that far out. things to check;

1) check each phase output separately to establish which phase output is incorrect….

2) once you have done that, check the noise filters for th low phase, 450v 50Uf If I rememeber correctly. If you have a filter or two broken down, that will affect it

3) run it up off airframe without the type 12 controller, and see if your output is correct, type 12’s are solid state and they do cause problems when the start to go u/s

Thanks MJR,
is that why the prices that were listed the yesterday were removed??

Peter, yes thats right, there was a bit of a break down in communication, the prices were a mix up

I have a rear bullet fairing complete if you are interested. it’s a swiss one, so has some minor differences, but bolts straight on. PM me if you are interested