# Power tool cells

### Help Support HomeBuiltAirplanes.com:

#### proppastie

##### Well-Known Member
Log Member
use a full BMS. Emulate that
You can do state of the art and be 99,999% safe
so obviously it is not as simple as buying a motor, controler, batteries and hooking them together, or a wrecked scooter......

#### GeeZee

##### Well-Known Member
HBA Supporter
Have you guys seen the e-PPG projects.
One uses Greenworks 80 v 4ah packs ($205ea on Amazon) he’s at “Minne.us” Claims 18hp for the motor he sells. He sells mating connectors for many different brands of batt packs. The other is openppg.com. It uses Bonka 22000mAh 7S LiPo Battery [USA ($250 ea) packs but they use 4 large scale RC motors and props. The 4 motor/prop option would not really apply to an e-ultralight. Hmmm, well maybe a pusher config would work.....

#### pictsidhe

##### Well-Known Member
so obviously it is not as simple as buying a motor, controler, batteries and hooking them together, or a wrecked scooter......
If you use a complete system such as a scooter, yes, it is simple. The problems come when people start building their own bits and adding features. Wrecked vehicles have often had a hard impact, which may have damaged the battery...

#### pictsidhe

##### Well-Known Member
Have you guys seen the e-PPG projects.
One uses Greenworks 80 v 4ah packs ($205ea on Amazon) he’s at “Minne.us” Claims 18hp for the motor he sells. He sells mating connectors for many different brands of batt packs. The other is openppg.com. It uses Bonka 22000mAh 7S LiPo Battery [USA ($250 ea) packs but they use 4 large scale RC motors and props. The 4 motor/prop option would not really apply to an e-ultralight. Hmmm, well maybe a pusher config would work.....
320Wh is less than 1/2h for one hour. 18hp for 5 minutes would probably need 4 packs. They have less capacity under high discharge. 30 minutes, ~23 packs. Amazon puts the pack weight at 5.5lb.

#### GeeZee

##### Well-Known Member
HBA Supporter
For the version that uses the 4 RC motors it looks like they are thinking 8 of the Bonka 2.2AH cells will weight about 48lbs and give them 40-50 min flight time. I’ve noticed in some of the YouTube vids they climb then shut down and glide for a while. As they point out that’s the best reason to go electric with the PPGs. The total silence and assured instant restart.

Last edited:

#### GeeZee

##### Well-Known Member
HBA Supporter
Also, just to be clear I’m not advocating for an e power fixed wing aircraft. I’m just passing on some info.