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PatMc

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Everything posted by PatMc

  1. I think you'll find that the wing chord is 7.25" /18.5cm. I have a pair fuselages of an early version from a deceased clubmate's estate. They were from a full Protech Unlimited 160cm span aerobatic model plus one fuselage & tail only. Both fuselages were badly bashed about but useable & the complete model had a brushless motor & had been flown with 7 cell nicads. First thing I did was a brushless inrunner + 3s lipo conversion, then reinforced the front end with 3mm ply. The kit's plastic motor mount was later discarded & a new set up fabricated from birch ply & epoxy glass board to take an outrunner. I did a similar nose job & power conversion to the spare (most battered) fuselage & used a tatty 6 ft polyhedral wing that was a repaired left over from another model to make it a 2 function glider. The wing chord was a little oversize so the trailing edge was notched to make it fit. Climb & glide performance exceeded my expectation to the point that I'm eventually going to make a replacement wood fuselage & recover the wing. That version has been named Igor (Terry Prachett fans should understand) I'll post some pics of the models later & some details of the brushless conversion if you're interested.
  2. If the signal to the Rx was being intermittently blocked wouldn't that be easily picked up by the telemetry record ?
  3. Peter, I don't think we are disagreeing, I think we are considering different scenarios. I have only cast doubt on the "spraying with bullets whilst prop hanging" quote.
  4. You're right, of course, Martin. Complete woolly non thinking on my part. But I think the idea of a D7 prop hanging & spraying enemy aircraft from below with machine gun fire is total fantasy. Even the slowest likely target aircraft, e.g. the much loathed R.E.8, would be travelling at at least 60 mph, making only one or two rounds even likely to hit it during the time available. The odds of a vital strike would be pretty poor compared to the conventional already proven tactics of the time. Back on track - Chris, one book that details an aerobatic display with a Spitfire is Sigh For a Merlin by the well known test pilot Alex Henshaw, The display being for the benefit of Winston Churchill who was hosting a group of, IIRC, US politicians & military officers. OTOH I think it was Pierre Clostermann in his book The Big Show that makes the point that any pilot doing aerobatics in a war zone is making himself a potential easy target. With this in mind I think if a war plane is in clean factory fresh condition aerobatics would be in order (though IMO not precise model aerobatic contest standard). But if the model is presented dirtied up to represent an in service operational machine the flying display should be more just tight turns & zooming around plus of course standard take off, procedure turns etc
  5. Surely if the attack aircraft is prop hanging it will be at the mercy of the wind speed & direction.
  6. That's about 2.5 - 3 times the power of a Cox 049 which would give that power on 6 x 3 or 6 x 4 prop.
  7. Only if the target aiircraft is flying almost exactly in an up or downwind direction or there's virtualy no wind. I go with the stall turn/wingover as being most likely.
  8. If the Fokker is hovering below an aircraft flying at, say 90mph (132fps), it wont be "spraying" it with many bullets. 😏
  9. Which cup did the Egg Marketing Board sponsor ? Of course the FA cup will never be able to get a sponsor 😉
  10. Link to Safety Data sheet for Enertherm. Looks like you would be best to wear a mask when sanding as well as HW cutting.
  11. If you are referring to a power model then it's unnecessary. The point of the dive is to increase the model's airspeed above it's level cruising speed, which of course is the only way to achieve this with a glider. Obviously the same change in airspeed can be achieved with a power model simply by opening the throttle whilst flying S&L at normal cruising speed.
  12. I doubt the likes of Pritstick's adhesive contains enough water to make any significant expansion, label paper contains no water.
  13. I scan formers, ribs etc from the plan then print to A4 size label paper. Stick the result(s) on the wood then cut & sand as necessary. Similar to the Prit stick method but easier.
  14. He firmly believed that everyone should only buy from their own LMS. If he didn't recognise you as a regular local he wouldn't sell you any high value item & was reluctant even with consumables. I'd been to a business meeting near his shop once & popped in to buy some fretsaw blades. Whilst there had a look round & made some queries about a couple of interesting S/H engines he had for sale. He told me a cock & bull story that the 2 particular engines were reserved for a regular customer. Then he quizzed me about my LMS & why was I not giving them my trade, followed by a lecture on the evils of people buying engines, kits, radio gear etc at Elvington & other shows instead of their LMS. Finally he begrudgingly sold me the fretsaw blades I was after. I once noticed that when flying at the town moor his Tx was always in a home made soft leather cover. I was told that he made sure it didn't get marked in any way so that it could be sold as new shop display stock.
  15. Because it's running faster (higher RPM) in flight doesn't necessarily mean that it's developing more BHP. The torque will have reduced & BHP is proportional to Torque x RPM. It all depends on where on the power curve the engine is running at static.
  16. So you didn't meet Chippy (Sunderland MS owner) then ? 🤣
  17. Since the service seems to better than or as good as Hobbyking's at their prime is anyone concerned if HK never returns ?
  18. Grounds for your fears are developing. 😱
  19. According to Ron Warring 1952 test in Aeromodeller 6x3 - 7x4 are suitable depending on model. Personally I'd try a 6x4.
  20. Fitting a 4 stroke engine would be more out of character for the Galahad than ailerons. I built & flew one in the late 1960's or early 1970's as my first or second aileron model. It had reduced dihedral, reduced incidence & strip ailerons, power was an non-throttled Fox 15 later changed for a throttled version Fox 25. The original was designed for aerobatics, albeit without ailerons but it was developed to have them as in Andy's link. PS mine was nylon covered.
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