Post by Jef on Aug 25, 2014 14:39:38 GMT
Hi Chuckers.
My now rather elderly SXPro DLG, which has been in my collection for more than 5 years, flew its battery pack flat on Saturday. This is an also elderly "350mAh" NiMH rx battery, and the capacity was apparently down to about 110mAh!
Luckily, I am glad to say, the model was very low when the voltage dropped below the 3V threshold required for the receiver. It was the other side of a deep, wet, ditch when it landed itself safely too.
This prompted me to actually try out a battery that I had thought about using some time ago.
The model is now fitted with a Li-Ion single cell 2200mAh battery. This was one of 6 found in a 3S-2P, 4400mAh laptop battery pack.
The 350mAh NiMH weighed about 10g less than the 2200mAh Li-Ion cell, but the extra weight is not a problem, the cylindrical form of the cell makes fitting in a tiny fuselage very easy, and in very light conditions, yesterday, in the evening, the old DLG managed a flight in excess of 4 minutes, in a short testing session, straight after fitting it.
The FrSky 2.4GHz rx range is still excellent with the lower voltage, and the HS45s in the wing and SD100 on the elevator, are not noticeably slower.
A change of job means I will get some regular lunchtime DLGing, and I expect to be able to charge the model on a weekly basis now!
Jef
My now rather elderly SXPro DLG, which has been in my collection for more than 5 years, flew its battery pack flat on Saturday. This is an also elderly "350mAh" NiMH rx battery, and the capacity was apparently down to about 110mAh!
Luckily, I am glad to say, the model was very low when the voltage dropped below the 3V threshold required for the receiver. It was the other side of a deep, wet, ditch when it landed itself safely too.
This prompted me to actually try out a battery that I had thought about using some time ago.
The model is now fitted with a Li-Ion single cell 2200mAh battery. This was one of 6 found in a 3S-2P, 4400mAh laptop battery pack.
The 350mAh NiMH weighed about 10g less than the 2200mAh Li-Ion cell, but the extra weight is not a problem, the cylindrical form of the cell makes fitting in a tiny fuselage very easy, and in very light conditions, yesterday, in the evening, the old DLG managed a flight in excess of 4 minutes, in a short testing session, straight after fitting it.
The FrSky 2.4GHz rx range is still excellent with the lower voltage, and the HS45s in the wing and SD100 on the elevator, are not noticeably slower.
A change of job means I will get some regular lunchtime DLGing, and I expect to be able to charge the model on a weekly basis now!
Jef