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John Bolding
Joined: 23 May 2006
Posts: 281
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 Posted: Sat Nov 18, 2006 4:26 am Post subject: xxx RE: Re: 701 amphibious floats |
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You're having trouble with some of Zenith's math??? The next thing you're gonna say is some of the numbers on the drawings don't add up!!
Seriously,
For what it's worth, Zenith allows you to increase the gross weight of the airplane on floats by the difference of what the airplane weighs on wheels. i.e. if the increase in empty weight is 150# in putting on amphibs you get to up the gross weight by 150#, keeping the payload the same as on wheels.
I couldn't get my arms all the way around that concept so I asked Sebastian, he said the floats carry their own weight aerodynamically( it's either the curved top surface or magic, take your pick) so no payload penalty if using ZENITH floats. Being the somewhat abrasive skeptic that I am, I wrote Chris a letter and asked him too, they are reading from the same script as I got the same answer, this time in writing. I still don't buy into it totally but there are a LOT of 701/ float operations going on at gross weights that are WAY above 1100# so who am I to argue.
Someone accused me of being less than truthful about Proseal being "fun to put on" you caught me, that is the nastiest stuff on the planet, after a session using it you might find some of it on your sox. the stuff migrates EVERYWHERE.
LOW&SLOW John Bolding
raymondj (raymondj(at)frontiernet.net)
[quote] To: zenith-list(at)matronics.com (zenith-list(at)matronics.com)
Sent: Friday, November 17, 2006 9:55 PM
Subject: xxx RE: Re: 701 amphibious floats
To both gentlemen who flew the 701 with floats. I am having trouble getting the math to work out on the configurations you are describing.
Gross WT 1100
-1150 lb amphib floats 136
-1/2 fuel 65
-empty WT 580
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remaining capacity 319
I think the numbers above are optimistic. What am I missing?
Ray J.
[b]
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raymondj(at)frontiernet.n
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| Posted: Sat Nov 18, 2006 10:17 am Post subject: xxx RE: Re: 701 amphibious floats |
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Can anyone guide me to the documentation for the increased GW allowed with floats? I'm not sure "Everybody is doing it." would carry much weight in the U.S. courts, if it came to that.
Anyone operating a 701 on floats care to comment?
Thanks in advance.
Ray J.
[quote] --
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David X
Joined: 10 Jan 2006
Posts: 154
Location: Princeton, NJ, USA
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| Posted: Sun Nov 19, 2006 2:36 pm Post subject: Re: xxx RE: Re: 701 amphibious floats |
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Perhaps off topic, but the FAA allows additional weight increase for floats (at least as it pertains to light-sport). If you're worried about legalities, you need some sort of statement from the manufacture that allows an increase in gross weight when floats are added.
Light-sport aircraft means an aircraft, other than a helicopter or powered-lift that, since its original certification, has continued to meet the following:
(1) A maximum takeoff weight of not more than—
(i) 660 pounds (300 kilograms) for lighter-than-air aircraft;
(ii) 1,320 pounds (600 kilograms) for aircraft not intended for operation on water; or
(iii) 1,430 pounds (650 kilograms) for an aircraft intended for operation on water.
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