Pizzaz from glow to Epower

[HobbyCNC]

Folks,
I have a Saito 72 4 cycle powered Pizzaz. It weighs 5 1/2 pounds and has 752 sq inches of wing area I'd like to convert to electric power. Currently uses a 13/6 prop which is fine.

Any suggestions on motor/ESC/prop/battery?

Good/better/best combos?

Thanks!

Dave

[joel231]

Hi there,

Have a look at something like the axi 2820/12 which is rated for models up to 2.5kgs or if you want a bit more go have a look at the AXI 4120/14. As for an ESC a 40 amp for the both.

I could be wrong though.

Cheers Joel

[Jimbo45cn]

Try motocalc, it will give you lots of options. Free 30 day trial too. Jim

[HobbyCNC]

Try motocalc, it will give you lots of options. Free 30 day trial too. Jim

Do you have a link to it?

I'm looking at:
AXI 4120/14
4S1P 4400 Lipo
Jeti +70 ESC
13/10E prop
How much flight time would this give? I KNOW it's an open question..just interested in 5-7 or 8-10 or whatever in minutes.

Thanks for your help!

Dave

[joel231]

Hey Mate,

Have a look here http://www.motocalc.com/

Cheers Joel

[HobbyCNC]

Hey Mate,

Have a look here http://www.motocalc.com/

Cheers Joel

Man I should've known that!

Thanks!

Dave

[joel231]

No probs mate.

i actually googled it and found it. Downloaded it and checking it out myself. :D

Cheers Joel

[HobbyCNC]

Well folks,
I've just ordered the following from Hobby-Lobby:

AXI 4120/14 W/mount $118
4S2P 4400 Lipo pack rated at 12C-16C, 53-70A discharge rate $127ea
4S battery guard $10
Jeti +70 ESC W/ program card $117
UBEC $35
13/10E prop $5

MotorCalc says @46A max rate @662W

I also got a 13/8E and a 14/7E to try.

Comments please?

Dave

[joel231]

Good luck with it Dave, and keep us posted on how it goes.

Cheers Joel

[HobbyCNC]

Will do!

Dave

[HobbyCNC]

Rec'd all the goodies from Hobby-Lobby. Will start the build/conversion this weekend. I'll post pics as I progress.

Dave Rigotti

[joel231]

Good luck with this Dave.

I just cant wait till my dam plans rock up so i can start my build up of my new plane.

Going to make 2 one glow and one electric.

Cheers Joel

[fish2keel]

Dave,

Get some pictures for us soon. I want to see this. This should a great build.

[HobbyCNC]

Pictures as promised.
Firewall needed modified for the 4 #8 blind nuts, (2) 3/16 holes for the Jeti tywrap, (2) 5/8" dia cooling air holes, and the slot enlarged for the wires to pass thru. Drilled out the AXI mount to accept #8-32 by 2" bolts and got some 3/8 dia by 1 1/2" spacers. About an hour later, the motor is installed. I may add a scoop on the bottom to provide additional cooilng air. MotoCalc says about 40A (600W) and the 4S1P 4400Mah PQ pack is good for 52A continous. I'll build a battery tray with a lot of holes to allow cooling air. Retain the battery with velcro.

Wadda think?

Dave Rigotti