Moderator Comment by Gary Mortimer on October 28, 2012 at 12:43am

Be very careful with those batteries looks like they can take a journey through your camera. How much does it weigh?

Comment by Nick Goodey on October 28, 2012 at 1:56am

I see what you mean about the battery :) I have some velcro now to secure them

I have a better battery box now didn't like the look of MK1 

Here are my calculations it is a bit heavy but according to my research the wing loading is in an acceptable range

Comment by Nick Goodey on October 28, 2012 at 1:58am

Here is a link to the spread sheet

Comment by Ted Van Slyck on October 28, 2012 at 1:23pm

whats the estimated flight time?

Comment by Nick Goodey on October 28, 2012 at 2:53pm

Comment by Nick Goodey just nowDelete Comment

With the DT850 motor and a single 2200mAh depleted by 70% of capacity at 1400 Grams of thrust 22.4 Amps i.e. Max throttle I calculated 4 minutes at a discharge rate of around 10C. Cruising at half thrust 700 Grams 8.2 Amps 11.2 minutes for 70% of a 2200mAh 

So with 6600 mAh in theory 12 minutes flat out, and over 30 mins at a mean thrust of 700 grams

Please see my spread sheet for all my test data  

Comment by Nick Goodey on October 28, 2012 at 3:09pm

Comment by Nick Goodey just nowDelete Comment

With the DT850 motor and a single 2200mAh depleted by 70% of capacity at 1400 Grams of thrust 22.4 Amps i.e. Max throttle I calculated 4 minutes at a discharge rate of around 10C. Cruising at half thrust 700 Grams 8.2 Amps 11.2 minutes for 70% of a 2200mAh 

So with 6600 mAh in theory 12 minutes flat out, and over 30 mins at a mean thrust of 700 grams

Please see my spread sheet for all my test data  

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