Stall Warning

[namjab]

Good afternoon everyone. I am proud to say that since my last post in 2016 I have become a member of the Jabiru family.
Still a student pilot with only around 6 odd hours on it, waiting in angst for that first landing (read all the posts about landings on here, lol) I can only say that I love this aircraft, what a pleasure to fly.

With that aside, my training school grounded her today after stall training. (she handles this brilliantly, extremely difficult to make her stall with clean wings, you really need to apply full back pressure very sharply to make it happen)

The reason being (for grounding) that the stall warning does not work with no flaps. Essentially after forcing here nose way up at low airspeed, she will eventually drop the nose. Doing it slowly she just hangs there. But during neither of these does she warn about a stall.
During a stall exercise with full flaps, the warning sounds as expected. Sucking on her port wing (with bugs removed, ha ha) as per a suggestion in another post does sound the horn, no issues there.
Has anyone experienced this by any chance?

Herewith some info for anyone interested.

Her name is Un#ucking Believable, aka V5-UFB
Jabiru J430
2010 model
320 hours tt
Dynon D180
AP74 Auto pilot (2 axis)
Standard six pack
Garmin 495

I am looking forward to meeting other Jabiru riders when I finally get to do some cross country.
Wish you all a great day.

[RogerRoger]

Hi Namjab. I have experienced it in a Jab Sp ( the little one) that I was trained on years ago. I never found the cause for this BUT suspected that the little metal plate protruding from the bottom of the stall orifice on the wing might have been bumped or bent slightly out of position at some stage, thus resulting in the erratic behavior at certain angles of attack.

On a side note, I have done the exercise numerous times and recently with an instructor friend we checked the numbers of the stall at various flap settings at a safe alt in the GFA. My Jabi descends at 560ft/minute wings level in full stall at 42 kts with 2 men on board and half tank. Those are numbers that one might find under a ballastic parachute canopy and enough to drive a chopper pilot to nasty remarks

[namjab]

Hi Roger.

I saw that today, was quite amazing. I have a chopper friend, may just send him your post, ha ha.

[Marius Schrenk]

Why the grounding.....a Samba has no stall warning.....people train on them all the time ?

[ZuluBen]

RogerRoger has it spot on.

The little metal tab under the stall warning need "tuning"

If here is another 430 close by, go take a look at the angle of its little tab and adjust yours.

Failing that, send me a WhatsApp on +267 seven wun seven zero zero fower ate fower and I will whatsup you pic.

(Welcome to the fun side of the island!)