it is going to help but not of the airframe design is limited to a
lower number. For example if the aircraft was originally rated at
450 kg maximum takeoff weight then having a 600 kg limit is not
going to help that particular aircraft because it is not going to be
able to be flown at anything more than the design certification.
Brian Ellis via groups.io wrote on
29/07/2022 10:28 pm:
The lift to up to 600kg may solve the weight issue?
?
Might be interesting to find out just how many D Motors (4
cylinder) are currently flying in the uk?
?
your performance with the 912 is
not that good, you are flying at?a very high
rpm,?the?one I built years ago cruised at 4200 55kts
never burned more than 12 litres and was also using
the DUC prop, have you tried changing pitch on prop
weight and CG is important and
the?majority of the UK xairs have a very forward CG,
all xairs no matter which engine fitted fly much
better with an aft CG and especially the falcon which
was never as good as the standard xair
?Seamus
----- Original Message
-----
Sent: Friday, July
29, 2022 9:45 AM
Subject: Re: [XAIR]
replacement engine
I have an X-Air F? ( Falcon in the UK ) with Rotax 912
and it works very well.? Performance is no greater than
a 2 stroke but much greater reliability. Theoretically
it should use less fuel but mine burns around 14 litres
an hour. Previous owner said it burnt 12 litres an hour
. The difference might be because I fitted heated carb
bodies when I bought it to prevent carb ice.
If attachments work there is a photo of the engine
installation attached.? The Engine mount is special for
the 912 and the forward engine struts are shortened.
There are some weight concerns. Mine was the development
aircraft and has lightweight wheels, floor and
originally had a smaller single tank.
It now has double tanks ( 55 Litres )? and as I fly
alone a long range tank with another 20 litres, so now
aircraft endurance is far greater than pilot endurance
!! - more than 5 hours.
In the UK there are a couple flying with the D-motor
which seems an interesting combination.? The only thing
I don't like with the 912 is flying with high revs (
cruise 4800-5000 rpm ) which makes for a noisy cockpit
although a recent Bose A20 has improved the situation.
The D-Motor , like the Jabiru flies with half the revs
so would be more comfortable but for me reliability is
the No consideration.? I like the D Motor but would want
to wait a few years to see how the reliability is before
flying with one.
Regards,
Jonathan
On 29/07/2022 10:13,
Michael Coates wrote:
Too heavy for the X-Air Standard....???
They own the X-Air Airframe as their test bed but cant
use it because of the weight etc....???? However it
looks promising !
Clive Cunningham wrote on
29/07/2022 5:27 pm:
Keep an eye on Radial
Motion. 3 cyl air cooled radial engine being made
in Australia. Looks like a winner!
Clive Cunningham
K&M HD
Motorcycles
U2 5-9 Kingston
Ave?
Richmond?
South Australia
5033??
Ph +61 8? 8234
1090?
kmmotor@...
kmmotorcycles.com.au
--
With regards, Michael Coates
AU +61 7 5522 0583
USA +1 213 984 1237
PIPISTREL AIRCRAFT DEALER OF THE YEAR 2012
Winner of the EAA August Raspet Award 2012
PIPISTREL AIRCRAFT DEALER OF THE YEAR 2017
mailto:mcoates@...
skype name: xcomavionics
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--
With regards, Michael Coates
AU +61 7 5522 0583
USA +1 213 984 1237
PIPISTREL AIRCRAFT DEALER OF THE YEAR 2012
Winner of the EAA August Raspet Award 2012
PIPISTREL AIRCRAFT DEALER OF THE YEAR 2017
mailto:mcoates@...
skype name: xcomavionics
Please note: because of the volume of e-mail we are now receiving our replies are
done using voice recognition software in an effort to speed up the reply process.
Sometimes the voice recognition program inserts silly words or doesn't actually
do what it is meant to do. Occasionally these mistakes get through our quick
proofreading of each e-mail sent, so please accept my apologies if the odd mistake
gets through.
Legal Notice: The information contained in this email is confidential
and intended only to be read by the person(s) to whom it is addressed.
No one is authorized to copy, use, disclose, distribute or rely on this
information for any purpose whatsoever. If this communication has been
sent to you in error, please email the sender and delete the message.
"Amateurs practice till they get it right;
Professionals practice till they can’t get it wrong."
