Bouncing needles

[bongodriver]

so I definately give more about them than about random internet "flight instructors".

I wonder who that is refering to......unnecessary personal attack

I happen to be a physicist (for real, it's not just a random claim )

why didn't I think of that......I forgot to say cross my heart

and the thing is that the engine has its resonance frequency just like anything else. So, if you have tuned your engine badly, it will be go into resonance, causing it to shake and vibrate. And, because the engine represents a large mass, it will shake up the entire airplane with it. This, in turn, includes cockpit instruments and, since the the instrument needles are allowed to move relative freely, inertia causes them to bounce as well.

I really don't agree, based purely on my 'claim' to be an actual pilot, not an effect I have heard of (until an eminent internet physicist said so), resonance on an airframe is a high frequency vibration, it doesn't cause needles to bounce as if you are driving a car off road.

[Redroach]

It wasn't directed against anyone, personally. I just happen to see more and more people reinforcing their claims with that.
But you're right, I should have left out my own statement about being a physicist, too. If I have to "scare away" people by claiming that I'm a "pro" on the matter (I'm not a 'pro' at all on these specific things, it's just general mechanics), I participate in the discussion in a wrong way.

[bongodriver]

I just realised that it might not have been me actually, I re read the entire thread....I guess I'm getting jumpy.....my bad.

in actual fact having re read the post I will withdraw my general statement on this, I think I am on a different wavelength...excuse the pun, of course instruments do bounce in turbulence and in severe engine rough running conditions, and to be honest I was concentrating on an exessive bounce with the RPM needle (this I do feel needs a tweaking)

[Redroach]

Originally Posted by bongodriver

I was concentrating on an exessive bounce with the RPM needle (this I do feel needs a tweaking)

hmm and I have to admit you're right about that. The rpm needle bounces more than, for example, the airspeed indicator, which is, at a first glance, not really obvious to me, too (maybe it's due to different springs in the instruments?!?).

So let's be friends again!

[JG52Krupi]

I love how people here are comparing modern light aircraft with a 1940s war time fighter built as quickly as possible to get to the front line I doubt you could even compare a flying spit to what they had back then. I.e. Regulations and limitations surviving ww2 aircraft have to meet.

[bongodriver]

I love how people here are comparing modern light aircraft with a 1940s war time fighter built as quickly as possible to get to the front line I doubt you could even compare a flying spit to what they had back then. I.e. Regulations and limitations surviving ww2 aircraft have to meet.

me personally am basing it on actual experience in the Tiger moth, Stearman and (despite being post war) percival prentice, in terms of instrumentation there are no regulations regarding the instruments for aircraft like the spit, these aircraft fly on 'permit to fly' which is the most basic airworthiness certification, even the tigers and Stearmans on public transport C of A don't have the need for modern instruments because they are certified for day VFR flight only.

Originally Posted by JG52Krupi

I love how people here are comparing modern light aircraft with a 1940s war time fighter built as quickly as possible to get to the front line I doubt you could even compare a flying spit to what they had back then. I.e. Regulations and limitations surviving ww2 aircraft have to meet.

So you say that British or German engineers were such morons and the quality was so bad, and pilots didn't care at all, that instruments are not working correctly, and it is just a accident that these types of instruments and technology is still in use even today?

If I can elaborate on your though - if it is so detailed "simulated" - every single rivet in a warplane should just fall off during second flight in this sim...

but is is always easier to say, that these instruments were so bad, and Maddox Games is simulating this "badness" correctly. as always...

[PeterPanPan]

Originally Posted by whipper1

Was out for a pleasure ride in a Hurri the other night and all the guages were bouncing like crazy..to the point of being almost unreadable. I have 100's of hours in light twins (RL) and have never seen anything like it except in the Bermuda Triangle.

Why has no one picked up on this post? Assuming whipper isn't pulling our legs, he's experienced bouncing instruments for real in a WWII fighter. Maybe Maddox Games are spot on? Just a thought.

Originally Posted by bongodriver

me personally am basing it on actual experience in the Tiger moth, Stearman and (despite being post war) percival prentice, in terms of instrumentation there are no regulations regarding the instruments for aircraft like the spit, these aircraft fly on 'permit to fly' which is the most basic airworthiness certification, even the tigers and Stearmans on public transport C of A don't have the need for modern instruments because they are certified for day VFR flight only.

Bongodriver, get used to this, in this forum guesswork based on "manuals" coming from questionable sources counts more than our personal experience as REAL pilots apparently, even the ones like us who have experience on vintage planes and warbirds..

U should see another thread where someone is trying to explain G-cutouts comparing a Lycoming with a Merlin