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walt.cannon(at)boeing.com
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 Posted: Mon Jun 12, 2006 1:52 am Post subject: CH-701 and Czech Amphib floats |
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Greetings All,
I am a CH701 (912S) builder/flyer. During the building of my plane I
thought that I would probably want to put it on floats and therefore
made the recommended structural enhancements. Now the time has come to
do some further research and I am interested in
comments/information/recommendations from anyone flying the 1150/1200
amphibious 4 wheel floats on a 701. Please feel free to mail me off line
and pictures would be welcomed. Here is a list of the main things I am
interested in:
Your experience and method for ordering the floats
Quality of the floats and associated components
How well the installation kit was engineered and if it included most all
the items you needed
How well the floats fit the attach point on your 701
Where you installed the retraction pump and system
How the floats handle on the water and take-off times and distances
Cruise performance
Thanks in advance for your input,
Walt Cannon
N701WD Seattle WA USA
Currently living in Brisbane Australia
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Max Johansson
Joined: 09 Jan 2006
Posts: 25
Location: Helsinki, Finland
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| Posted: Mon Jun 12, 2006 5:40 am Post subject: CH-701 and Czech Amphib floats |
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Walt
Are there structural enhancements needed for
a 701SP-kit ? I have not implemented any myself...
Have some experience with CZAW 1150 floats and yesterday a
C42 Ikarus was successfully mounted on CZAW 1200 floats here,
it behaves now much more nicely than on Full Lotus bags.
My friends are flying a 701-SP on 3-wheel 1150 floats
and we have another set for our Skyranger as well to
be installed this summer. My own 701 set is similar,
also delivered ready-made directly from CZAW with a
conversion kit that includes the folding nose-wheel.
The performance is grately influenced by the mounting
angle of the floats. If you want maximum performance,
say 140 km/h instead of 120 km/h you will have to
decrease this angle. The price is that the start and
landing will never use the STOL ability of the wing,
as no air will pass through the slat slot...
The 701 is always a great performer as a floatplane
and always lifts off from the water by itself. Just
push the throttle forward and enjoy the ride, no need
to find the sweet spot as in most other floatplanes.
always airborne within 200 yards even with a 80hp 912 engine,
but if you regularly want to pass high trees at the shoreline
it might be better to use the original float angle and
a 100 hp 912-ULS engine
I have made a water flying quadrant using the hydraulic
pump as one support and using a long bolt shaft for a water
rudder lifting lever (30 cm wire movement needed), for the
nosewheel lock release lever and for the a 3-pos flap handle,
as the original flap handle is way down and really hard to
use. All this sits now on the left floor between my legs.
best regards
Max
Max Johansson
making a 912-SP on 1150 floats
in Helsinki, Finland
[quote]--
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_________________
Max
Max Johansson, Helsinki, Finland
Building a CH701SP-912S
on CZAW amphibian floats |
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Max Johansson
Joined: 09 Jan 2006
Posts: 25
Location: Helsinki, Finland
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| Posted: Mon Jun 12, 2006 6:30 am Post subject: CH-701 and Czech Amphib floats |
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Sorry listers, this was intended just for Walt but never mind...
do not archieve
[quote]--
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_________________
Max
Max Johansson, Helsinki, Finland
Building a CH701SP-912S
on CZAW amphibian floats |
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jean-paul.roy4(at)tlb.sym
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| Posted: Tue Jun 13, 2006 3:28 pm Post subject: CH-701 and Czech Amphib floats |
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No problem Max as it was a really interesting reading. It is beneficial to
all.
Jean-Paul Roy
do not archive
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john.marzulli(at)gmail.co
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| Posted: Tue Jun 13, 2006 11:55 pm Post subject: CH-701 and Czech Amphib floats |
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Especially for everyone else in Seattle who wants to build an amphib.
John in Seattle
http://701Builder.blogspot.com
On 6/13/06, Jean-Paul Roy <jean-paul.roy4(at)tlb.sympatico.ca (jean-paul.roy4(at)tlb.sympatico.ca)> wrote:[quote] --> Zenith-List message posted by: "Jean-Paul Roy" <jean-paul.roy4(at)tlb.sympatico.ca (jean-paul.roy4(at)tlb.sympatico.ca)>
No problem Max as it was a really interesting reading. It is beneficial to
all.
Jean-Paul Roy
do not archive
---
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mileski(at)sonalysts.com
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| Posted: Wed Jun 14, 2006 5:37 am Post subject: CH-701 and Czech Amphib floats |
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Hi there,
Just thought I'd mention that a year or two ago I flew Skyshop's improved amphib installation on the 701. I think it returned the float installation angle to something a bit more efficient, and cruise was about 100mph. The installation looks much more standard, and all aspects of performance seemed impressive. There is still a pic at http://www.ch701.com/builders/Bill%20Mileski/Bill%20Mileski.htm at the bottom. I have been daydreaming about amphib floats for a long time and had decided to look into this installation should the time come. I seem to remember that Danny was very enthusiastic about the improvements and could provide more detail for those interested.
Bill Mileski
701 4hrs
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