Hi All,
I just wondered if there was any adjustment procedure for the stall warner on a UL-450. I have just taken a new hangar but the only downside is that the farm strip has a very short 370m runway. Now testing it out with my aircraft does not seem to be a problem. I have tried it at MAUW and I can land with quite a bit of runway spare and taking off is even quicker.
The art is obviously to get the approach speed right. At my previous airfield I had a 1000m runway but the aircraft was stored outside and I could easily come in at 60kts, float along the runway a bit and do a gentle touch down.
Coming in slower at my new airfield is not a problem but at about 57kts, the stall warner starts to go off so instinct says to push the nose down a bit. At full flap, the book says that my aircraft stalls around 35kts and trying it in the air, that figure seems to be about right so there is no reason that the stall warner needs to go off 22kts above that speed. I have an EFIS and an analogue ASI and they both agree on the speed so even allowing for a small error in the airspeed reading, this is still way above the stall speed.
I am not sure about other Jabs, but mine seems to have a 2-tone stall warner. It first comes on as a low pitch sound and then goes high pitch when you get very close to the stall (about 5kts or so above). I could just ignore it, but it gets extremely annoying and worrying when it goes off.
Ideally, I would like to come in at about 55kts then maybe move to 50kts just before flare.
I just wondered if there was any adjustment method for the stall warner.