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Maoraigh1 11th Jul 2016 19:37

You did notify the US authorities, as it's N, didn't you? Nothing so far on NTSB - usually just a mention, as foreign investigation.

piperboy84 11th Jul 2016 21:34


Originally Posted by Maoraigh1 (Post 9436894)
You did notify the US authorities, as it's N, didn't you? Nothing so far on NTSB - usually just a mention, as foreign investigation.

No I haven't I figured the AAIB have got it handled , doing a "investigation by correspondence" with them

Edit to add: just called a mate in the LA FSDO he transferred me over to joint FAA/ NTSB group in Seattle , the guy took the N number is going to send me an email with a few questions to get the incident in their database but said the AAIB will deal with it.

piperboy84 20th Jul 2016 19:37

https://1drv.ms/f/s!AsUqLYgbkd8em2Yk6qE-Vj3mSW89


The final product

NorthernChappie 20th Jul 2016 21:18

Is EGPT ready for that?

maxred 20th Jul 2016 21:42

I feel we all know the answer to that

4Screwaircrew 20th Jul 2016 22:54

I like it, very smart!

dont overfil 21st Jul 2016 21:53

Deja vu all over again. Takes me back to my disco days.

hub61 23rd Jul 2016 16:32

very smart but don't stare at it when you're flying!!

piperboy84 24th Jul 2016 12:38

Had the plane picked up yesterday from Corona and flown to a hangar at Van Nuys, the pilot said the new prop "surged" on take off, I assume this means the governor will need adjusted but what exactly is happening during a surge? Is it changing pitch?

maxred 25th Jul 2016 20:18

Could be a number of things. Basically the RPM is not being controlled/managed.

This exert from a maintenance book I have........not sure if your prop was just overhauled. Look carefully at the last paragraph below.

One interesting problem that can happen at prop overhaul is improper pitch-stop settings. On a single-engine propeller (where oil pressure increases blade angle), a prop may be set up for the naturally aspirated model of the airplane instead of the turbocharged model. For instance, a C-T210 prop may get set up as a C-210, or an A36TC prop may get set up as an A36 prop. The props for a turbocharged aircraft model actually have a higher blade pitch stop setting than the prop of the naturally aspirated aircraft of the same basic model.

The symptom that shows up here is the inability to keep RPM down at a particular density altitude and airspeed. Higher altitude or higher airspeed does nothing but make the symptom worse; i.e., the higher or faster you go, the higher the RPM goes. And when you point the nose down for descent, the RPM really takes off. In essence, it's acting just like a fixed-pitch prop. Once you reach the altitude at which the symptom shows up, any further increase in altitude, airspeed or engine torque causes a corresponding increase in RPM. The prop is against the high pitch stop and can't go any higher.

On twin-engine aircraft (where oil pressure decreases blade angle), it's the low-pitch stop that will occasionally get set improperly. This will show up as the inability to reach proper static-RPM because the blades can't go to a low enough angle to allow the engine to spin up to max. RPM. Once you're rolling on takeoff, however, the RPM comes up, and for the rest of the flight everything is just fine.

A note of caution here: On the single or twin, this particular problem will only happen after prop-hub maintenance of some kind. A similar symptom showing up suddenly or gradually, with no maintenance having been done on the prop or engine, indicates a weakening engine or possible governor-system trouble.

piperboy84 25th Jul 2016 20:40

Thanks max red.

The prop is new but is a different make and model than the old one , the governor was overhauled. Sounds like the governor will need to be calibrated to the new prop which makes sense. I suppose it a matter of verifying I'm getting the correct static rpm then checking for over speed and underspeed when changing pitch up in the cruise . Perhaps the mechanic may have just put the prop and governor on as set and hoped for the best .


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