Thanks for all the replies on this topic.
There is a pending new product listed on the Aircraft Spruce website here:
http://www.aircraftspruce.com/catalog/appages/ezcoolflap05-12374.php?clickkey=19459
The associated YouTube video is well worth watching, as it describes the
problem exactly.
Not sure about the electric actuator for the Dimona cowl flap - I would
prefer a cable system but at least electric would be an option.
Cheers
Martyn
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On 23/07/18 11:50 PM, Ian Mc Phee wrote:
Great idea.
Consider a flat ramp with a panio hinge on front and vertical sides
and consider using one of those Cessna veneer button controls which
you adjust by rotating for small movements or push centre button in to
make big adjustments. They are good and aircraft spruce have them.
That panel with luvers is very poor in h36. I'd really does need more
and when they fit 2400 or 2500 they must gave a good suck out.
I did the panio hinge idea on a grob 109a suck out but I only have
summer and winter adjust by moving 2 only 5mm bolts on the side
vertical. Would you like a photo?
I once flew an RV with that veneer control on the trim and it was the
best trim I have ever flown in in any aircraft.
Falke C have a cowl flap adjustable in flight but after 6000 to
8000hrs the 6mm bolt hinges can be totally worn like hell an all
rivets are loose on bracket. Remember the cowl flap is being pounded
by airflow and must be sturdy and last in long term.
Cowl flaps sure work with a Pawnee and are a great extra for towing.
Give it a go and advise
On another matter Crazed pilot dot com in USA have what they call a
wigwag controller and mounted two LED s either side just below
horizontal prop where they mount landing light in h36. Very good and
can be landing light as well. They are great for final and know one
regional airline in Australia re equipped with wig wag landing lights.
It is so good when on final and even scares birds at those airports
with bird problems.
On Sunday I was about to have somebody to taxi in front of me but I
forgot to turn the wig wag on so now just before hand on airbrakes on
base leg it is turn wig wag lights ON
Ian McPhee
+61 428847642
Box 657 Byron Bay NSW 2481
Australia
On Mon, 23 Jul 2018 19:17 Martyn Cook <[email protected]
<mailto:[email protected]>> wrote:
Dear Dimona Owners
When using my H36 for field landing training an adjustable engine
cowl
would be very useful. Open up the bottom of the engine bay to allow
plenty of cooling air through at a high power setting, then close the
cowl to reduce the rate of cooling when the throttle was closed at
top
of descent. This would keep the engine warmer for the go-around as
the
student flew over the fence in what was hopefully a well-executed
circuit.
I realise that an adjustable cowl flap would need to be a certified
modification, and I'm just checking with the group to see whether
anyone
has developed and installed such a mod, and how well it worked.
On my aircraft the cooling air outlet is way smaller than the area of
the intake. The usual wisdom with air-cooled engines is that the
outlet
needs to be a little larger than the inlet to allow for the air to
expand as it gains heat from the engine.
Kind regards
Martyn
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