I do not have much range so I have to carry access fuel. Rather than carry jerry cans in the cabin ( what I am use to) I decided to carry 40L in each float compartment
What effect will this have on handling, carrying weight below the centre-line of the air-frame?
I have installed a plywood floor in the compartments that rest on the rivets / ribs.
I could really use advice from experienced pilots on this
I used to do this routinely with my C180.
Same set up with reinforced plywood bottoms. No differences on handling although I did find it harder to get up on the step at max take-off weight when the outside temperature was over 20 degrees.
Have fun and shoot me a PM with your planned route!
- Rank Moderator
- Posts: 5409
- Joined: Mon Feb 16, 2004 3:47 pm
- Location: Straight outta Dundarave...
Happiness is V1 at Thompson!
Ass, Licence, Job. In that order.
I don't know how the weight in the floats (below the center line of the airframe) will behave. I also reached out to the manufacturer of the float for input as well.
Thanks for your input
There are also structural limitations for each compartment.PilotDAR wrote: ↑Mon Jun 03, 2019 5:32 pmAs long as you conform to the W&B limits for the plane, you'll be fine. Don't overload it. The greater portion of the approved weight below the fuselage is not a problem, consider how much weight is down there with a set of amphibs. Or, those pilots who forget to pump out their floats!
Yes, there may be, and they must be followed.There are also structural limitations for each compartment.
There maybe a placard near the compartment, and a reference in the limitations section of the flight manual supplement for the float installation on the plane. Many float installations lack both.
Of course, a pilot must abide by all limitations, and is responsible for determining them (you can't ignore just because the placard was worn off). But commonly, floats and skis get installed on airplanes without such data being conveyed with a placard or FMS. It's a gap in our system that sometimes floats and skis don't have much documentation accompanying them to the next plane.
I did check back that the Aerocet 3400 amphibs I had installed on my friend's 182 do have an FMS, and a 100 pound limitation per compartment.
I opine that for many light floatplanes, particularly amphibs, that this is a self solving problem, as the airplane does not have enough excess payload to allow the plane to carry enough to overload the float compartments!
I did several seasons hauling fuel and other items all over the Arctic in the float compartments of a Cessna 185 amphibian.
My experience is that it WILL take longer to get on the step and WILL take a longer water run than if you put the same weight in the cabin. Up to 20% longer takeoff runs depending on weights and density altitude.
Carry only items that do not mater if they get wet. There is always a bit of water in the floats and everything will be wet.
I would reinforce...DO NOT OVERLOAD the float compartments. DO NOT put fish in the float compartments unless you know EXACTLY how much they weight!
80 liters of fuel in the floats (176 lbs) might make it very doggy at gross weight getting off the water. Be very careful of short takeoff areas.
Lol. There must be a story behind this.
Keep the load in the compartments within the limitations for the floats and don’t load anything pointy or sharp. Most importantly don’t put anything corrosive in there, a battery, case of pop, etc.
Please contact me via PM.