empty than my Rebel, my 1900 load would be more like yours at
2150. Like I said, weight makes a big difference on mine. I
really notice a passenger or when I have full fuel. So I can see
why you need that 0360. There is a formula for translating excess
hp into climb rate, but forgot what it is. But you should
actually be able to calculate how many extra pounds can be
carried with 20 or 30 more hp.
All I can say about mine is, I want more hp... But not more
weight.
Walter
-----Original Message-----
From: mike.davis@dcsol.com
[mailto:mike.davis@dcsol.com]On Behalf Of
Alan Hepburn
Sent: Monday, November 28, 2005 4:34 PM
To: rebel-builders@dcsol.com
Subject: Re: Murphy 1800 Amphib's user info required
Walter:
I was meaning that at 2,200 the 1800s might get a
little bogged down. I'd
imagine they might be kind of sluggish getting onto
the step. But of
course, your Rebel will probably carry as much load at
1900 as my Elite will
at maybe 2050. I seem to take about 12 seconds solo,
and about 35 seconds
at the 2,200 gross, all on pretty hot days. It was
like that this ummer in
Ontario.
On the drop testing at 2200 lbs for the Montanas,
Transport simply said that
they had not approved a Murphy on Montanas before, and
had no "installation
information" on them. I guess if they'd checked with
their YVR office,
they'd have found that the prototype Elite floatplane
used them. Anyway, I
was able to pass them an Email from Montana quoting
this drop test, and that
seemed to satisfy them. Whether they'd have been
satisfied with less, who
knows?
Al
----- Original Message -----
From: "Walter Klatt" <Walter.Klatt@shaw.ca>
To: <rebel-builders@dcsol.com>
Sent: Monday, November 28, 2005 9:58 AM
Subject: RE: Murphy 1800 Amphib's user info required
Is it harderAl, not sure what the toll is with lighter buoyancy.not a heavyto get on the step or longer take-off runs? My Rebel is also
registered at 1900 pounds, and can tell you that iscertainly doesload for it. The only times when my Rebel has struggled on
take-off is at higher altitudes with a good load. At near sea
level I have yet to find any sort of limit. Weightor less, butmake a difference. I can take off solo in 10 secondsOf coursethat increases to over 20 seconds with a heavy load.would be a longglassy water lengthens a run, too. But 30 secondsrate goes fromrun for me (excluding high altitude lakes). Climbhave to land in1100 fpm solo to 600 fpm with a heavy load (again at near sea
level).
The only time I don't like heavy loads is when Ithat. I thinkrough water, and for that matter, light loads are not good
either. Not sure if more buoyancy would help withfar no problemsthat's where longer floats help.
As for the gear, it is stronger than it looks. Sotoo far, butwith mine. Don't think I would want to drop it frompretty easy withI just try to keep my landings gentle, which is-------------------------------------------------------a little power.
Walter
-----Original Message-----
From: mike.davis@dcsol.com
[mailto:mike.davis@dcsol.com]On Behalf Of
Alan Hepburn
Sent: Monday, November 28, 2005 5:26 AM
To: rebel-builders@dcsol.com
Subject: Re: Murphy 1800 Amphib's user info required
In Canada, there is a formula for determining the max
gross, which has wing
area, flap area, power etc. as inputs. Of course,
there is also the issue
of g loading, but on floats I do not believe this is a
concern, as the
airplane flies so much slower. Let's say it's 25%
slower. That makes the
peak gust loading 50% less, so the stress on a
floatplane when hitting a
gust will actually be less than for the same landplane
at factory gross.
Transport Canada also wanted to know that the gear
could take it.
Fortunately, the Montana floats have been drop tested
at 2,200 lbs. I don't
know if an equivalent number exists for the Murphy
1800s, so that might be a
problem. Anyway, I think the lack of buoyancy would
really start to take a
toll with the smaller displacement.
Al
----- Original Message -----
From: "Mike Davis" <mike.davis@dcsol.com>
To: <rebel-builders@dcsol.com>
Sent: Monday, November 28, 2005 2:44 AM
Subject: Re: Murphy 1800 Amphib's user info required
US when applying for
your gross weight on the Murphy Aircraft. There
is you must supply the
gross Rebel on 1800 amphibs This gives me a legal
load "factory" rated gross Although the Elite and Rebel my Rebel that heavy, lbs. has to hurt weight the factory lot of documentation to inspected my 2 kits would might like to consider the lbs, and have been
drop 2,200 lbs gross. I was with Transport Canada, what goes on in the my airplane came out
at Canadian rules (which
require claimed number of than just round the about 25 lbs left to
paint lbs less than the they're apparently who control
experimental permission from them to fit finished, and to satisfy relevant bits at the experience of operating 1800 direct with the following
and experience to
hopefully required guy's :-) ) both floats and float have any contact
details -------------------------------------------------------
------------------
- attempt to clear them of identical floats in unusual or undesirable on identical floats
used higher, and with the also need an
in-service validated in some way.
One service on aircraft types operation flown on
high-time mailshot to ask them the
hours negotiate on this
point exceed 2500 hours. excess of 300 hours of analysis or load testing
data such as FAR 23. Murphy Aircraft, but if
you analysis for the Elite is gross weight value? It -------------------------------------------------------
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