Battery Mod Info

[damoncooper]

Damon, have you "finalized" your battery build or are you still experimenting some? I wasn't going to build mine until you were through tweaking.

Phase one is pretty much complete. I'm bumping up against the limitation of the DJI battery at this point. When it hits 10%, the flight is over, regardless of how much capacity remains in external batteries.

Working on that

 

[Phatzo]

Phase one is pretty much complete. I'm bumping up against the limitation of the DJI battery at this point. When it hits 10%, the mig is over, regardless of how much capacity remains in external batteries.

Working on that

please excuse my ignorance but is mig a typo or an abreveation of "migration"
maybe the dumbest question on the thread but i really need to know LOL

cheers


Sent from my iPhone using Tapatalk

 

[damoncooper]

please excuse my ignorance but is mig a typo or an abreveation of "migration"
maybe the dumbest question on the thread but i really need to know LOL

cheers


Sent from my iPhone using Tapatalk

Sorry: flight. Corrected

 

[richeanx]

Just test flew with batteries mounted to the rear and still no change in behavior...back to the drawing board! lol

I can now say with a fair amount of certainty that my I1 just doesn't like the extra weight in gps mode..these items were closest in weight to the tp2700's and it behaved identically (with stock battery btw) to the way it did with the battery mod..

 

[damoncooper]

I can now say with a fair amount of certainty that my I1 just doesn't like the extra weight in gps mode..these items were closest in weight to the tp2700's and it behaved identically (with stock battery btw) to the way it did with the battery mod..

Thanks for the data point at least. How old is your I1?

Have you used compressed air on your motors/vacuumed them out? Have you checked temp on your motors after flight to see if they are roughly the same and only slightly warm to touch? FW1.6? Flying with battery temps in the 20C-40C range?

 

[richeanx]

Thanks for the data point at least. How old is your I1?

Have you used compressed air on your motors/vacuumed them out? Have you checked temp on your motors after flight to see if they are roughly the same and only slightly warm to touch? FW1.6? Flying with battery temps in the 20C-40C range?

It will be a year old next month..motors and (everything else) have been cleaned and properly maintained and yes, they are cool to the touch after flight.
FW 1.6 and battery temps are in the 20-40c range. Was twitchy in gps mode and flew fine in atti just the same as it did with the mod...
I am at an altitude of 6200ft and average temps are about 45f outside. May be going dow to sea level later this week..if I do I will test down there to see if air density is a factor with the gps and extra weight.

 

[Adelberg aerial imaging]

Seems contrary to almost everything we have found in this thread! Weight and cg have not been a major factor in mine or Damon's birds.

 

[richeanx]

Seems contrary to almost everything we have found in this thread! Weight and cg have not been a major factor in mine or Damon's birds.

Have either of you tested this mod at altitude?

 

[richeanx]

Have either of you tested this mod at altitude?

I am as stumped as anybody else, believe me!

 

[Adelberg aerial imaging]

I have not flown the tp2700 out of hover, perhaps Damon has? I have flown the 9600 up to 400!feet and 1000 feet away with no issues in gps

 

[Adelberg aerial imaging]

I believe you have isolated it to weight on your bird. Hard to figure

 

[richeanx]

I have not flown the tp2700 out of hover, perhaps Damon has? I have flown the 9600 up to 400!feet and 1000 feet away with no issues in gps

Have you flow it anywhere above 6000ft asl though?

 

[Adelberg aerial imaging]

No at basically sea level here.

 

[Adelberg aerial imaging]

In fact I can basically only fly in gps as my bird has skates in att mode and I've tried to recal many times . Mod or reg batt same deal it takes off to the left at 5 mph so when I'm shooting I have to be in gps. I mostly do a programed orbit ariund a fixed point.

 

[richeanx]

In fact I can basically only fly in gps as my bird has skates in att mode and I've tried to recal many times . Mod or reg batt same deal it takes off to the left at 5 mph so when I'm shooting I have to be in gps. I mostly do a programed orbit ariund a fixed point.

Hmm.. that's odd! I need to become a better pilot in atti mode anyway so if that's what I'm stuck with, maybe it's a good thing! I hope to get outta the mountains this thursday and if I have time, I'll test at sea level..would be cool if thin air is my issue!

 

[damoncooper]

It will be a year old next month..motors and (everything else) have been cleaned and properly maintained and yes, they are cool to the touch after flight.
FW 1.6 and battery temps are in the 20-40c range. Was twitchy in gps mode and flew fine in atti just the same as it did with the mod...
I am at an altitude of 6200ft and average temps are about 45f outside. May be going dow to sea level later this week..if I do I will test down there to see if air density is a factor with the gps and extra weight.

Ah. Altitude could be a factor. 14x4.8 props or DJI 13-inch? The greater pitch 14's or the DJI high altitude props might be needed. Have you ever seen a message about max motor speed reached?

 

[Adelberg aerial imaging]

It flies with the same props at same alt in atti or Gps. Flies ok in atti and not in gps? Airs thinner at6k and density alt higher in ca given higher temps. Prop performance degrades but in both modes

 

[richeanx]

Ah. Altitude could be a factor. 14x4.8 props or DJI 13-inch? The great pitch 14's or the DJI high altitude props might be needed. Have you ever seen a message about max motor speed reached?

I have never seen that message before..I've had no issues with the t motor 14x4.8, love these props!
I'm no expert but it would seem like the 14x4.8's and dji high altitude would have similar characteristics?
Would be interesting to find out...won't know anything until it's been flown at sea level though...

 

[richeanx]

It flies with the same props at same alt in atti or Gps. Flies ok in atti and not in gps? Airs thinner at6k and density alt higher in ca given higher temps. Prop performance degrades but in both modes

Air density up here vs.sea level is night and day, also we don't have high temps here (lake tahoe) in the winter! lol
I have about 700 skydives so I know a little bit about density altitude...and how temperature effects it.
We'll find out thursday hopefully!

 

[richeanx]

It flies with the same props at same alt in atti or Gps. Flies ok in atti and not in gps? Airs thinner at6k and density alt higher in ca given higher temps. Prop performance degrades but in both modes

Flies great in all modes with no payload...average temps are 45f during the day lately.