Pete's  Planes

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Power to weight ratio for cells at various run times                  watts per gram

cell name

cell type

cell weight

grams

run time

4 minutes

8 minutes

16 minutes

32 minutes
 Irate 2200  Li-Po 10C

43

AR

1.25

.59

.30
 CBP 5300  Li-Po  20C

150

1.74

.98

.48

.26
 Any  Li-Po  3C  

AR

AR

AR

?
 Konion  Li-Ion

41

BIL

.7

.35

.18
 GP 2200  NMH

45

.90

.51

.26

.13
 Saphion  Li-Ph

38

BIL

.50

.25

.13
 GP 3300  NMH

62

.80

.47

.24

.12
 Kan 1300  NMH

25

.74

.43

.22

.11
 Sanyo 1950FAUP  NMH

39

.70

.40

.20

.10
 Puffin 3300  NMH 62 .61 .40 .21 .11
 CBP 2000  NMH

45

.62

.35

.18

.09
 Sanyo 2400  NCD

59

.58

.33

.17

.09
 Sanyo HR-2600  NMH

63

.59

.31

.16

.08
     
 Bold numbers are near to test values. Faint numbers are extrapolated.

 AR  =  Above supplier's recommended discharge rate.

 BIL  =  Built-in current limiter.

 
  I have compiled this table to help me to compare various types of cell [NCD, NMH, Li-Po, etc].

 You can be forgiven for thinking that this information is available in abundance, on the web, and   in magazines. Not so. Much searching and processing was required to produce this small table, and  you will see that I had to resort to extrapolation.

 If you study one column [say the 8 minute column] you will see the progression in power to weight ratio from Nicads to Lipos.

 Note that the values apply to cells in new condition. Normal use, mis-use, and the passage of time, all contribute to a deterioration in performance. From anecdotal evidence [I think that's all we will ever see] there appears to be a large variation, between cell types, in rate of deterioration.