IBob

Hi Blueadventures, I struck exactly the same thing on my Sav S build. In my case the slop was in the holes in the control stick, not in the bush that passes through the torque tube. A mate here turned up a couple of little top-hat bushes and we drilled out the holes in the control stick to take them. I wonder if this is the result of using 'almost the same but not quite' metric drills for holes that take imperial AN bolts........

C'mon guys: plastic bottles with large diameter tops that nevertheless seal tight when the cap is on are available in any gas station. Just tip out the lurid chemical that some eejits mistake for 'drink' and stow within arm's reach.........)

Perhaps these were some of the awful decisions about what is for the greater good, that we all hope never to face, but that sometimes have to be made in wartime. For example: As we now know, the Allies learnt to crack the (shifting) coded messages from the Enigma encoding machine, used for critical communications by the German military. The dilemma then was how to use that information without alerting the Germans to the fact that their comms were not secure. One common rumour after the war was that the war office knew of the upcoming air raid that blitzed Coventry, but chose not to alert the populace for this reason. Whether this is true, I have no idea. But it certainly seems possible.

Hi Marty, we were discussing 912 starts while working on a build yesterday: The combination of your positive and negative wiring, and the soft start (timed spark retard period) on your engine should give you prompt and faultless starts every time. It works so well, in fact, that the day I get any hesitancy or misfiring on a start will be the day I go looking for the problem.

True enough. But you don't think the Gestapo were seen as dealing with the Jewish?

I have no idea when the tide changed, but certainly prior to WW2 a significant number of privileged people in Allied countries were pro-fascist and also anti-semitic. This included the likes of aviator Charles Lindbergh, Dame Lucy Houston (who wrote a check for 100,000pounds to support the Schneider Trophy effort when the British government would not, as a deliberate snub to the Labour government of the time), and Edward VIII who abdicated. I don't know whether or how much this may have been the case in Australia and NZ.

We're locked down right now, but here's a couple of shots from a flight earlier in the month: the ranges approx 4500ft with a little snow on them to the west of Hood aerodrome in the N Island of NZ. When the westerlies push the clouds over and down, we stay away, but that day was perfect for cruising along the snow line........

Mine is on a lug on the starter motor case.

Yep, provided there is enough cable to route it so that you can secure it to the engine mount etc. I'm amazed at some of the pics we occasionally see of wiring trailing loose around engine compartments: seems to me that's asking for a break or a short due to vibration and chafing.......

Is this it? My yellow alternator wires come up to a connector. This has a mating connector, and the wires from that then go up to the regulator. That's the connector, cable tied down and together at lower centre of the pic:

Marty, you already have your alternator yellow wires connected to the voltage regulator, right?

Crikey, that is a long one, in this age of ever shrinking attention spans! But I am interested, so mental note for rainy day......

100hp 912 gearbox ratio is 2.43 : 1 so 5000 = 2058 5100 = 2099 5200 = 2140 5300 = 2181 5400 = 2222 5500 = 2263 5600 = 2305 5700 = 2347 5800 = 2387

Thank you, Meglin. I think here that would also be calendar time and what you call resource would be flight hours.

Agreed, Garfly. I found that old clip quite wonderful..............)

Yep, it's the slippery slope of More Is Better. Quite aside from questions of legality, and the realisation that as a cheap drunk I might take a trip and never make it back, it was what deterred me from various drugs when various drugs were all the go: the real fear that altered states would render everyday life grey and bland by contrast.

Yep the camera work and editing is all getting so slick, it's losing it's impact. I just watched a similar Red Bull thing: lots of short fast clips, often from angles that accentuate the action, and while it ought to be more exciting, it somehow isn't. Also: at the back of the mind lurks the realisation that it is now so easy to CG or C modify this stuff...it just becomes a big shrug.

I've been on DC6s that used water injection on very short strips. I was told it was to boost the engine output, while also helping improve cooling. I would think the combustion pressure in the engine would increase: I would want to be confident the engine could manage that

Hi Meglin, I am interested in what you have written here, but I am not understanding part of it. I am guessing by resource you mean working life? Also 'bends and tends to break...'? Can you check your translation? Thanks.

An aside regarding the charging and trigger coils that provide the energy and the timing for the ignition: off topic, and has been mentioned before, but this seems like a good place to revisit it. The gap between these coils and the trigger magnet cams on the flywheel is critical: too wide a gap has been seen to give poor starting, even with a well maintained engine and battery system. This gap is given as 0.4 - 0.5mm (16 - 20 thou) for old type coils, 0.3 - 0.4mm (12 - 16 thou) for new type coils. It is not hard to locate these fittings on the back of the engine, but the gotcha is this: Because the feeler gauge is between the strong magnet of the cam and the coil, it will stick tightly to the cam, and feel like a good snug fit, even if it is not. Furthermore, when 'feeling' from the side' the feeler gauge has to be flexed to fit the gap, which also gives the illusion of a snug fit. We found it easiest to use the brass feeler gauges which are part of some sets; also to remove (unscrew) the required gauge from the set to give better 'feel'. In the absence of brass feeler gauges, it would be essential to ensure the next size up gauge was 'no-go'.

Plus one for the cranking: There is no electrical connection on the 912 between the battery and the ignition systems. The electricity for the ignition is generated by coils in the stator as the engine rotates, and the engine must rotate at a sufficient speed for that to happen. So, to start well and reliably, the engine needs to rotate briskly.

That, and hold them still at the front while doing them up from the back...

https://www.theguardian.com/world/2021/aug/11/canada-helicopter-dairy-queen

Apparently they are a great aircraft, and unusually enjoyable for the pax too, as they get to see over the top........)

Yep. Which is why I think something shifting back under the front-to-rear-stick torque tube with the initial acceleration and stick back takeoff, making it then impossible to get the stick forward, is a possibility: all the preflight checks would go just fine.