Turnigy C80100 Performance Data

[adrian_sm]

8)

Fantastic improvement.

 

[Thud]

Mauimart,
Thanks for the data.
It is actually better than expected. that fan is a real compromise of efficancy with the straight blades on it....compounded by the blade count (to ease fabrication)

I wish i had time to build a real airfoil shape & with proper angles of attack for some dramatic air pumping posibilities


(i doubt any one would complain about RC "noise" with a siren blasting away LOL!)

PLease keep us posted on the durability of the cast urathane fan, I really cooked one out in Cali last summer. it didn't fail but did distort rather dramticly.

was spinning it at 9k rpm's & the motors were running increadbly hot...ambient temp that day was over 100f & it was 107f in the pits at the adams race track. Be good to find out how it holds up under normal useage.
thanks again.
T

 

[h0tr0d]

Mauimart,

great sharing, thank you very much.

Since you are looking for less heat, what about a new rewind? 9 turn of 11awg. ~50% copper losses than what you have now.


This "winding" diagram is without the green insulation, just some thin katpon... 11awg is 2.3mm, I've put 2.4 in the drawing to account for the wire insulation.

 

[mauimart]

Following a recent ride I found the fan to be warped due to temperature increase. The fan material seems rather vulnerable to heat. I added an aluminum plate to the exterior which should prevent it from warping. Here is another chart for yesterdays ride (without the plate). It was a 5.5 mile ride averaging about 1700W and the motor did not exceed 80C. :lol:

 

[Thud]

Hey mauimart,
I like your fix on the distortion problem. I had hoped my original tests in the 107deg heat of california's indian summer would not be repeated out in Hawaii.
The material is a simple cast urathane & the mass is off set to the outside. still investigating the posibility of glass fiber re-enforcment or another more durable casting compound.

I had ponderd the idea of additional support in the form of a ring on the inside of the fan (where it fits around the 80mm section of the can) but it is a complicated mold & my time is short.

please keep us posted on your trials.
thx
T

 

[salty9]

Note on urethane fan. Aromatic urethane degrades rapidly under UV light. If the fan is made of aromatic urethane I would suggest coating with a good quality acrylic paint.

 

[mauimart]

I pushed the bike a bit further today on a 3.5 mile run using 7th gear and averaging right around 2kW with 3kW peaks. Motor temperature reached lower 80's (C) and the aluminum plate on the fan did the trick - no warping. I got some video this time and integrated the data using RaceRender 2 (free edition). Synchronization is not perfect and may have something to do with relying on the CA to send the data accurately at 1 Hz as that's what I am currently using as the time stamp. I can update the code so that it uses the data loggers clock to stamp the data. This and a 5 Hz update rate might make things a bit smoother. I'll post the data graph later but for now here is the video (limited to 3 minutes in free version). Note toward the end the A-hole who decides to pass at the worst possible time.

[youtube]m9xMDtdmIiU[/youtube]

 

[Arlo1]

Very cool. I love it when you shift gears its like a F1 car.

 

[h0tr0d]

That video is amazing!

And by far the coolest sounding bike on this forum. 8)

Congrats MauiMart!