

Aug 31, 2012, 11:24 PM  

You can access all the menus with the IR remote control, but only the inflight menus with the RC Tx. Those menus control the settings that you could want to tweak while flying.
If the PPM string fails(cable gets disconnected) RVOSD will set RTH or switch to the second PPM input(second receiver) if the second PPM input is enabled. This is a feature already. 
Sep 01, 2012, 05:01 AM  

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What do you think about the winds aloft idea? No other OSD has this, it would really stand out from the competition, and its a simple E6B calculation once you have the raw data coming in. 

Sep 01, 2012, 11:35 AM  
Joined Aug 2012
18 Posts

FBW Problem
Posted on another thread but this one seems a lot more active...
Testing FBW on the ground. The elevator goes down when I point the nose down and up when I point the nose up. This is just the opposite of what should happen to stabilize the plane. Control surfaces are working correctly when transmitter sticks are used. Any ideas? The RVOSD is pointing forward and I have run thru all the steps in the manual more than once. Thanks, 
Sep 01, 2012, 01:29 PM  

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2There is an step on the wizard that ask you to set the elevator for maximum climb, do it properly. 

Sep 01, 2012, 04:39 PM  
United States, CA, Redding
Joined Jul 2004
83 Posts

ezuhf
Are any of you using your RVOSD 5 with a EZUHF? I see a place in the instructions that talk about setting up RSSI using the EZUHF rx's. The instructions talk about PWM RSSI signal from EZUHF.
What is PWM RSSI signal?? When I use the combined PPM mode I can't seem to get my fail safe set right so i'm using "regular" rx setting at the moment with "glitch counter". Can someone help me out with the terminology and rx settings. I"m using my EZUHF with a 9cap. thanks for any help, Todd 
Sep 01, 2012, 04:55 PM  

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Alex, thank you for being so open to suggestions. It is very exciting to be part of the evolution. 

Sep 01, 2012, 05:15 PM  
Mesa, Arizona
Joined Nov 2006
2,473 Posts

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Sep 01, 2012, 05:28 PM  

Wind Velocity and Direction Formula
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Here are the formulas: The math behind the equation requires the use of vectors and triangle geometry. You are required to break each vector down into its vertical and horizontal component. Subtract the GS vector from the TAS vector for each vertical and horizontal value and the wind speed is calculated using pythagoream theorem A^2 + B^2 = C^2 where C is the wind speed. The wind direction is calculated using the arctan function and checking if the wind is a headwind of a tailwind WS = Wind Speed WD = Wind Direction TC = True Course TH = True Heading TAS = True Airspeed GS = Groundspeed Here is the formula for the wind speed (you can use this in Excel provided you use Named Ranges) WS =ROUND(SQRT(((SIN(RADIANS(MOD(TH, 360)))*TAS)(SIN(RADIANS(MOD(TC, 360)))*GS))^2 +((COS(RADIANS(MOD(TH, 360)))*TAS)(COS(RADIANS(MOD(TC, 360)))*GS))^2), 0) Breaking down the formula, we are using pythagoream theorem WS = square root([Horizontal Value Difference]^2 + [Vertical Value Difference]^2) and rouding the number to the nearest whole number Here is the formula for the wind direction WD =ROUND(MOD(DEGREES(ATAN(((SIN(RADIANS(MOD(TH, 360)))*TAS)(SIN(RADIANS(MOD(TC, 360)))*GS))/((COS(RADIANS(MOD(TH, 360)))*TAS)(COS(RADIANS(MOD(TC, 360)))*GS))))+IF(((COS(RADIANS(MOD(TH, 360)))*TAS)(COS(RADIANS(MOD(TC, 360)))*GS))<0, 180, 0), 360), 0) Breaking down this formula, we are getting the arctangent([Horizontal Value Difference] / [Vertical Value Difference]) and then checking the sign of the [Vertical Value Difference] and adding 180 if it is negative. To simplify the calculations into manageable chunks, open up excel and copy these into a cell. When you copy the formula change the name of the cell to what it equals or change to the appropriate cell (A1) GSH = SIN(RADIANS(MOD(TC, 360)))*GS ‘Horizontal Portion of GS Vector GSV = COS(RADIANS(MOD(TC, 360)))*GS ‘Vertical Portion of GS Vector TASH = SIN(RADIANS(MOD(TH, 360)))*TAS ‘Horizontal Portion of TAS Vector TASV = COS(RADIANS(MOD(TH, 360)))*TAS ‘Vertical Portion of TAS Vector DeltaH = TASHGSH ‘Horizontal Vector Difference DeltaV = TASVGSV ‘Vertical Vector Difference WS = ROUND(SQRT(DeltaH^2 +DeltaV^2), 0) ‘Pythagoream Theorem rounded WD = ROUND(MOD(DEGREES(ATAN(DeltaH/DeltaV))+IF(DeltaV<0, 180, 0), 360), 0) ‘arc tangent plus check for Vertical Vector Difference sign 

Sep 01, 2012, 06:35 PM  

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Of course, I can also google searching for this stuff, but my point is, that it is not enough to copy the formula from the first link you get. It takes a lot more than this. There is no simplicity at all on this process. This is why I have to make a balance between the usefulness of new features and the time it takes to implement, then choose what to do next. 

Sep 01, 2012, 07:09 PM  

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At least keep it on the wish list. Maybe every so often you can post a poll to rank new requests and see what people want. I know everyone has different priorities. I think this would be awesome. 

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