MSE RIGHT INSTRUMENT PANEL ACCESS

[N400YS]

Hi

 

I have a jumpy RPM Gauge and after I have checked the wire from the tachometer, I would like to check my plug behind the right panel.

Is there a possibility to unscrew the extrem right part of the panel in order to see if the rpm wire is loosen? Perhaps just remove the radio out of its rack?

Some advise to achieve this work?

 

Thanks

[carusoam]

Do you know if it is a mechanical spinning cable type rpm gauge? (Speedometer cable from your bicycle type)

If yes, that is an easy part to purchase and replace.  They are known to wear out after a few decades.  Bouncing needle is the typical sign of wear or lack of lubrication...

If it is electronic...

wait for the next MS post.

Best regards,

-a-

[N400YS]

8 minutes ago, carusoam said:

Do you know if it is a mechanical spinning cable type rpm gauge? (Speedometer cable from your bicycle type)

If yes, that is an easy part to purchase and replace.  They are known to wear out after a few decades.  Bouncing needle is the typical sign of wear or lack of lubrication...

If it is electronic...

wait for the next MS post.

Best regards,

-a-

Thank you for your quick answer ;-)

 

No, it is an eletronical gauge on the MSE (1995).  There is no speedometer cable. Just a wire from the Magneto.

 

Oliver

Edited May 6, 2016 by N400YS

[Marauder]

27 minutes ago, N400YS said:

Thank you for your quick answer ;-)

 

No, it is an eletronical gauge on the MSE (1995).  There is no speedometer cable. Just a wire from the Magneto.

 

Oliver

Oliver -- the breaker panel that the gauge resides in can be accessed by removing the screws that hold it in place, My advice -- if you can avoid it, try not to get access that way. The number of wires and the breakers make for a tight environment. I can access my electronic gauges by removing my co-pilot seat and laying on my back and working underneath the panel.

 

[N400YS]

Just now, Marauder said:

Oliver -- the breaker panel that the gauge resides in can be accessed by removing the screws that hold it in place, My advice -- if you can avoid it, try not to get access that way. The number of wires and the breakers make for a tight environment. I can access my electronic gauges by removing my co-pilot seat and laying on my back and working underneath the panel.

 

Thank you Marauder!

 

You're definitely right! I will access by the down side after removing the SCAT ventilation duct!

 

Thanks

[carusoam]

Hopefully the J has a different rpm sensor than the Long Body's.... There have been some discussions on that expensive device over the years.  If you need some back ground on that... It can probably be found searching for Hall effect rpm transducer?

Best regards,

-a-

 

[Guest]

The tachometer can be removed without difficulty, you may have to remove the MAP gauge below frost, then the tachometer.

Clarence

[N400YS]

Thanks all!

actually it is quite easy to access to the rpm gauge underneath the panel.

the plug was not tightened enough so I think that the little plug play could generate the problem.

test flight is pending to confirm that the problem is solved !

 

I'll keep you informed !

 

Oliver

[N400YS]

Hi Guys

 

Tested the Rpm Indicator in flight yesterday: still jumpy above 2000rpm.

 

I think that the indicator is the culprit...so as I will get a EDM 730 we will check all the line next annual !

 

Thanks for help

 

Oliver

Edited May 10, 2016 by N400YS

[Piloto]

Check the engine side connection. Engine vibration above 2,000 rpm could induce erratic connection.

José

[Guest]

7 hours ago, Piloto said:

Check the engine side connection. Engine vibration above 2,000 rpm could induce erratic connection.

José

Don't the tachometer wires connect to the magneto switch?

Clarence

[N400YS]

13 hours ago, Piloto said:

Check the engine side connection. Engine vibration above 2,000 rpm could induce erratic connection.

José

Thanks José.

 

I already have checked the engine side and nothing was found loose....

 

So, now, I consider that it is a mechanics job :-)  I'm just a pilot :-)

[N400YS]

Hi

 

Just to say that if you would like to control your rpm gauge efficiency, or if you have like me a rpm gauge issue, you could use a very usefull Iphone app: ENGINE RPM

https://itunes.apple.com/fr/app/engine-rpm/id340401811?mt=8

 

Tested yesterday in flight: very accurate and easy to use.!!

[ArtVandelay]

$9!!! That's a lot for the CBs among us.

[Andy95W]

Just now, teejayevans said:

$9!!! That's a lot for the CBs among us.

And I wonder just how accurate it can be since it only analyzes sound.  If it were a true optical rpm detector, I might consider the $9.

[N400YS]

36 minutes ago, N1395W said:

And I wonder just how accurate it can be since it only analyzes sound.  If it were a true optical rpm detector, I might consider the $9.

Hi N1395W

 

It is accurate enough for the worth.

Sincerely, there is no raison that the sound measuring be less accurate than the optical one.

I would concur if it was used for a prop balancing setting. But in this case (random rpm gauge failure), an optical measuring is very heavy to install. An accoustic measuring technic is very light and easy to start compared to an optical one.(Wires outside de cockpit, sticker on the prop)

I checked the rpm during the 30 minutes of my last flight and the rpm variations, read on the device were very low: maximum 5%. It was enough to set my rpm on 2500 instead 2600 or more.

 

So, to help temporaly, a 9$ investment is a bargain!

Edited June 27, 2016 by N400YS

[Andy95W]

I'm glad to hear it works well.  

Back in the 1970's I built a small, handheld Heathkit RPM gauge for model airplanes that used an optical sensor that "saw" the prop blades as they passed by.  I sure wish I still had that today.  I think my mom tossed it when I was in college!

[Yetti]

You can get a dedicated one for $10.00   http://www.hobbyking.com/hobbyking/store/__10783__Turnigy_Multi_Blade_Micro_Tachometer.html

[N400YS]

On 10/05/2016 at 7:50 PM, Piloto said:

Check the engine side connection. Engine vibration above 2,000 rpm could induce erratic connection.

José

Hi Folks

Here is the end of the story..

 

The culprits were two wires from the magnetos that were tighten too much. Once I loose the wires (that were attached on the engine mount) the rpm meter reading became nominal and steady.

 

Thanks for your help!

 

Olivier

Edited September 25, 2016 by N400YS

[carusoam]

Great follow-up, Olivier.

Best regards,

-a-