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mtskull

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About mtskull

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    West Yorkshire

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  1. mtskull

    WW1 Thornycroft restoration

    My meaning precisely (and a very small bubble at that). Make no mistake, an empty petrol tank, whether washed out or not, becomes a bomb in the presence of a source of ignition.
  2. mtskull

    WW1 Thornycroft restoration

    Please, please tell me you are going to fill it with water first!
  3. mtskull

    Mosquito Refuelling

    It's very tricky; what appear to be spats might indeed be something else. Still going with the notion that these are spats and working on the basis that this must be a single engined aircraft (no part of nacelle visible), everything that can be seen is consistent with it being a Magister, except that it appears too big (although that might be a trick of perspective). Any other thoughts?
  4. mtskull

    Mosquito Refuelling

    Not over complicating, just looking at facts rather than making assumptions. How can we be sure that the aircraft in the first photo is TK620? -the serial number isn't legible as it is in the Google photo. It certainly begins TK; that can be seen under the starboard wing, but a search of the serial number database shows dozens of Mosquito B.35's with serials in the TK series. There is no evidence that the Google photo was taken on the same occasion; Two Mosquitos being refuelled whils parked side by side could not have been a unique occurrence.
  5. mtskull

    Mosquito Refuelling

    Having further studied and enlarged the photo, I'll play Devil's advocate for a moment: I accept that the aircraft in the background can't be a Harrow (which raises the question: what on earth is it? And to what aircraft does the wingtip with multiple aerials belong?). Details of the Mosquito are certainly consistent with it being a B.mk35 but, as for the serial number, without a better resolution image I think we're making too much of a leap of faith by taking as definitive the suggestion that the aircraft is TK620. There's another clue here: look at what the man carrying out the refuelling is wearing; looks like dark overalls and forage cap. Might he not be dressed somewhat differently if this photo was taken on a sunny day in Egypt?
  6. mtskull

    Mosquito Refuelling

    The distinctive wheel spat appears to belong to a Handley Page Harrow, which would fit with the photo being taken in Egypt.
  7. mtskull

    FV432 driving on street query

    Admittedly this was 18 years ago but when I dropped the kerb (and lowered the footway) for access to my drive, the local authority allowed me to carry out the work myself; the only work carried out by an outside contractor was the final surfacing. All that was involved was a site visit from a man from the highways department, who listened as I explained what I proposed to do, expressed surprise that I wanted to do it myself, gave me a specification to follow and told me to go ahead. I'm pretty sure that nobody ever even came back to check that it had been done properly.
  8. mtskull

    Brake cylinder sleeving

    I have used this company many times and found them to be friendly, helpful and knowledgeable. With turnaround times in the order of a couple of months, they are not quick but the cost is reasonable and the quality excellent. A word of warning: DO NOT send your parts to the address shown by a Google search; it is out of date and your parts will get lost. Make sure you use the address from their own website.
  9. mtskull

    WW1 Thornycroft restoration

    Agreed; although in my experience a clean piston amongst sooty ones suggests a water leak into the cylinder.
  10. mtskull

    RR B80 oil pressure/starter motor

    Thanks for that; we will certainly back track up the wires. We know where the solenoid is; it is integral with the starter but, in the absence of a wiring diagram, I wouldn't rule out there being another relay in the circuit somewhere. That said, evidence now suggests that it is the auto box neutral sensor which is at fault.
  11. mtskull

    RR B80 oil pressure/starter motor

    Things I learned this week: 1) The 24v starter won't even think about turning when connected to 12v supply; no real surprises there. 2) The fault is still present, so unless we have two starters displaying identical, intermittent faults, the problem lies with the vehicle. We are closing in on the source of the trouble......
  12. mtskull

    RR B80 oil pressure/starter motor

    Thanks Richard, 30psi when driving is in accordance with what I've been seeing on the gauge, so if that's normal I'm not too concerned about it being low at idle; maybe I will just tweak the idle speed up a bit. Our starter doesn't have a visible solenoid either; it is contained inside the casing at the rear of the starter. I bench tested it with the casing off just to check that everything worked as it should; it does with no problems until it is installed and warmed up. I have now swapped starters with another 12v B80 in the fleet, so if the problem is cured we will know that it is the starter that is at fault, whereas if it persists, we will know that it is a fault on the vehicle. Andy
  13. A couple more B80 queries: Went out for a run last weekend; warm weather and engine working fairly hard. Water temp steady between 160-180F, oil temp much the same. When properly hot, oil pressure at idle was only showing 5psi, increasing to 15 at fast idle and 30-40 when driving. Is this normal, or should we be investigating the condition of the oil pump and bearings? My other query concerns the starter motor (Simms, 12 Volt). It works fine time after time when cold but once the engine is hot, nothing happens when pressing the starter button except that the ammeter shows a discharge of 10 Amps. I have taken the starter off, inspected it and bench tested it successfully through 100 cycles but when re-installed, the same issue arises. I initially thought that the pinion might be jamming on the ring gear but there is not even any clicking from the solenoid; furthermore, turning the engine manually doesn't help (although it will start on the hand crank). I suspect that the solenoid has developed a fault that only manifests itself when hot. Has anybody else experienced this? We have a spare starter but it is military spec. and is marked 24 Volt. Can anybody tell me if there are any fundamental differences, or is the only implication of using this on a 12 Volt system the fact that it would draw twice the current? Any thoughts/suggestions welcome.
  14. mtskull

    Rolls Royce B80

    A couple more B80 questions: Went out for a run yesterday; engine working fairly hard. Water temp steady between 160-180F, oil temp much the same. When properly hot, oil pressure at idle was only showing 5psi, increasing to 15 at fast idle and 30-40 when driving. Is this normal, or should we be investigating the condition of the oil pump and bearings? The other query concerns the starter motor (12 v). It works fine time after time when cold but once the engine is hot, nothing happens when pressing the starter button except that the ammeter shows a discharge of 10 Amps. I have taken the starter off, inspected it and bench tested it successfully through 100 cycles but when re-installed, the same issue arises. I initially thought that the pinion might be jamming on the ring gear but there is not even any clicking from the solenoid and turning the engine manually doesn't help (although it will start on the hand crank). I suspect that the solenoid has a fault that only manifests itself when hot but if anybody has experienced the same problem or can offer any advice, that would be most welcome. Andy
  15. mtskull

    Thornycroft Big Ben

    As long as you are certain that the cracking is only affecting the external water jackets and if leakage is all that you are concerned about, there are several products which you add to the coolant which will seal the cracks permanently. I can personally recommend Holts Wundaweld. I recently tried this on a Rolls-Royce B80 with frost damage (more in hope than expectation of success) and it hasn't leaked a drop since.
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