May 06, 2011, 10:57 PM
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Western NY
Joined Nov 2006
2,402 Posts
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Thanks, Gringostr. Hoping to maiden the 330L EP tomorrow (Saturday) as weather conditions are looking good, only inhibitor is that the field is still pretty wet, but I'm relatively confident I'll be able to fly it tomorrow. Stay tuned for video over the next few days if the maiden happens.
I did a final measure of AUW with AND without the 2 x 3S 2650mAh 40C LiPo (Turnigy) packs installed:
* Weight with 6S battery: ~6.5 lbs.
* Weight without battery: ~5.5 lbs.
I used a digital postal scale to weigh the model.
So the battery pack adds 1 lb. of weight, that was more or less expected. A heavier plane generally flies better in the winds, it's rare that we have calm days around here so the heavier flying weight has its advantages as heavier planes are more stable in windy conditions. The only disadvantage is that the 330L will need to be brought in with some speed for a smooth landing, really no different than the Nitro-powered planes that I own and fly fairly regularly. A 46 motor is only 2-3 oz. lighter than the 60 motor that I used, but 6S is generally too much current for most 46 size electric motors so 5S is generally the limit. Overall, if the 330L was powered by a 46 size brushless motor, I would only expect a weight difference of about 6-7 oz. overall. Dropping to a 32 size motor would drop the model weight by nearly 1 lb. (or more), but I still think a 32-size motor is too small for this bird.
C/G was amazingly spot-on, as per the assembly manual, no adjustments or battery pack relocation necessary. I threw a couple of Align T-Rex 600 velcro straps into the battery area to secure the coupled 3S battery packs to the plywood frame, they're easy to work with and remove if necessary, they run about $5 per pair at local hobby shops.
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