Matronics Email Lists

Hi David,

That's useful sats/alt info.

The figures I quoted are, of course, only good for low-altitude.

Cheers,

Mark

Hi,

Normals sats for a healthy (and non-COPD) person are 94-98%. Below 88% is considered poor and would warrant high flow oxygen (15 LPM) through a non-rebreathing mask in the emergency situation. ...

Hi Frank,

Yes, I have a PV-50 for sale. Please contact me off list if you are interested.

Cheers,

Mark

Hello Peter,

If you want to remake those white-wire connections, I can supply you (for free) with the correct crimp terminals (male & female) for that Rotax connector.

Cheers,

Mark

Hi,

The Rotax tacho really cannot be trusted. Many years ago, one of my customers told me that when he fitted a CSC-1/P constant speed controller, it showed 600 RPM more than the Rotax tacho! So wh ...

Hi Marcel,

It's 162 cm (64 inches).

Cheers,

Mark

Hi,

I have an Arplast PV50 VP prop (narrow blades) that is surplus to requirements. It has done 410 hours and is in basically sound condition. Some minor dings on the blades but nothing major. It h ...

Hi Ian,

> The stall strips do help define the stall, seem to offer no performance penalty and are worth putting on.

True, but it's worth remembering that if the aircraft is vibrating a lot ( ...

Hi Karl,

Sorry, I can't remember what the min/max gaps should be and I no longer own a Rotax engine but I'm sure someone here can advise you (and the numbers are in the manual).

Cheers,

Mark

Hi Svein,

How about checking the ignition pickup gaps. Perhaps, they are wide enough to make the ignition unreliable at very low RPM (i.e. when starting).

Cheers,

Mark

Hello Stan,

Have you tried removing the SSM and then starting on just one ignition? If that works reliably re-install the SSM but don't connect the red wire so that it's not activated when you acti ...

Howdy folks,

Cranking the engine and then turning the ignition on is not equivalent to how the Soft Start module functions. The purpose of the SSM is to keep the ignition retarded while the starter ...

OK, let's put our thinking caps on and ponder switches and diodes.

We're only concerned here with the operation of the fine pitch limit switch and its associated diode (incidentally, the SR3000 has ...

Hi,

I have nothing to say re the suitability of the microswitches/diodes used by Woodcomp in the SR3000. However, from what I know about the characteristics of the scimitar bladed SR3000 fitted wit ...

Hi Ron,

I have to own up to having a commercial interest in the SSM (I manufacture them for ConAir). As I already have more than enough work in the pipeline I wont try to convince you to buy one, ...

In my previous message, I talked about checking that the fine pitch
hard stop was in a sensible position. I forgot to mention that if you want to do that check, be very careful not to damage the swi ...

Folks,

What follows is a general comment and is not related to any specific failure of an electric VP prop system.

Jos is right to question the quality of the electrics (motor/switches/diodes/wi ...

Folks,

I have been busy. You can now see a demo video of the SmartASS
being used on approach. It's simulated, but real. By that I mean that
the video has been captured from a computer flight simu ...

Hi Graham,

From what I read, good AOA information is the ultimate indicator of
how the wing is doing with respect to airspeed/loading, etc. and, therefore,
is the perfect source of information f ...

Folks,

Although it is neither an AOA system or a stall warner, my SmartASS unit (www.smartavionics.com) will help the pilot to maintain a safe margin of speed above the stall on approach. I sincere ...