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Spark Float Gear?
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<blockquote data-quote="Ted Schoenfelder" data-source="post: 52299" data-attributes="member: 7687"><p>Ok, here is a follow up experiment that seems that initially seems to eliminate the ball float (and other float gear) performance issues noted above. This arrangement seems relatively stable, considering I was testing in gusty winds in my back yard. </p><p></p><p>I used my "no float" gear setup (tot. 85 g), shown in the pic above and attached a couple of flotation tubes (pipe insulation) with Velcro to the outside of this gear. These tubes provide just adequate buoyancy for neutral flotation and adds 15 g to total weight. It will allow recovery of the aircraft from a dunk in the water. However, it does NOT facilitate landing and taking off from water due to the mount location, the A/C bottom would get wet! See pic below:</p><p></p><p>[ATTACH=full]5260[/ATTACH] </p><p></p><p>I did have one instance (bug) of the aircraft going into an uncommanded auto rotation around a hover point with an accompanying "max motor speed" warning, when I tried to stop the turn. I have seen this before in a couple of other gear configurations (not with floats) so I am still suspicious of an under performing motor, or some related issue, which exacerbates adverse performance symptoms. It happened once and I could not duplicate.</p><p></p><p>I decided to test the above configuration based on comments on the official DJI Forum related to possible conflicts with the visual system by objects hanging under the aircraft, like float gear. This type of conflict could fool the aircraft into sensing ground, or an object, is too near and forcing an initial uncommanded climb or vice versa on descent, resisting the descent until forced. I'm not sure if this test proves anything, but it certainly seemed to make a difference by having the flotation placed outside the vision system's sensing arc and outside the prop wash. Weight did not seem to be a factor, except it will obviously reduce flight times.</p></blockquote><p></p>
[QUOTE="Ted Schoenfelder, post: 52299, member: 7687"] Ok, here is a follow up experiment that seems that initially seems to eliminate the ball float (and other float gear) performance issues noted above. This arrangement seems relatively stable, considering I was testing in gusty winds in my back yard. I used my "no float" gear setup (tot. 85 g), shown in the pic above and attached a couple of flotation tubes (pipe insulation) with Velcro to the outside of this gear. These tubes provide just adequate buoyancy for neutral flotation and adds 15 g to total weight. It will allow recovery of the aircraft from a dunk in the water. However, it does NOT facilitate landing and taking off from water due to the mount location, the A/C bottom would get wet! See pic below: [ATTACH=full]5260[/ATTACH] I did have one instance (bug) of the aircraft going into an uncommanded auto rotation around a hover point with an accompanying "max motor speed" warning, when I tried to stop the turn. I have seen this before in a couple of other gear configurations (not with floats) so I am still suspicious of an under performing motor, or some related issue, which exacerbates adverse performance symptoms. It happened once and I could not duplicate. I decided to test the above configuration based on comments on the official DJI Forum related to possible conflicts with the visual system by objects hanging under the aircraft, like float gear. This type of conflict could fool the aircraft into sensing ground, or an object, is too near and forcing an initial uncommanded climb or vice versa on descent, resisting the descent until forced. I'm not sure if this test proves anything, but it certainly seemed to make a difference by having the flotation placed outside the vision system's sensing arc and outside the prop wash. Weight did not seem to be a factor, except it will obviously reduce flight times. [/QUOTE]
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Spark Float Gear?