I'll answer your question instead of just making a post.....
Castle Talon 35 ESC spool up rate set to 15.

Back in the air today!! The morning was a nice 78F and very light winds, so I decided to venture out. Worked great, ship is about where it was before the bush trimming incident. It was a little slow to spool up, need to adjust ESC to faster ramp. I have a short takeoff area and need to get rolling faster. What spool rate have you guys used?

Best,   DennisT

In search of the Plan set and templates for Mike Pratt's Primary Force.  Have had no results on my quest.   Please email me if you're able to help.
 dc56heliman@gmail.com
   Thank you and have a great July 4th !

What spool rate have you guys used?

Best,   DennisT

I fly on concrets so I use slow.  My current ESCs are set to full (long story) and the little 2320 motors nearly rip the nacelles off.  Not good for anything to ramp up fast.  Medium is probably OK.

Ken

Do you have them on all of the time or only under pressure.  I used to do that on the inboard side with about a 1/8" of tubing.  Found that it was hurting takeoff.  How do you do it. I can see that having it on just enough all of the time might work.

Ken

    All the time. It seems to have no significant effect on takeoff, but slightly improve the landing. Mechanism is the same - short lengths of fuel tubing set to just very slight compression with the collar tightened down and staked with Ambroid. I am not sure how to describe the degree of braking, not super-tight but definitely enough that it won't  spin if you are not pushing it.

     Of course, a few takeoffs and landings, it loosens up a little. People don't appreciate how fast the wheels spin. For example,  my 2.25" wheels, landing at 40 mph, the wheels spin around 6000 rpm.

      Brett

Let me guess, you have printed separators.....  Does it help?  I am finally recognizing that everything I knew about IC is just taking up space in an aver shrinking memory bank.  Battery cooling is a real art form and a lot of our planes really don't do it very well, especially conversions.    Anybody that can feel 1 gram of tip weight in wind has to have a better battery box.  Pictures?  or not.

Some pictures are at https://stunthanger.com/smf/plotters-and-cut-files/what-have-you-printed-lately/ . 

My P30Bs end a flight at just over 3.5 volts/cell.  As I recall, they get to about 120 degrees F.  At lower voltages internal resistance, hence heating, goes way up. 

I didn't like the way people were making Li-ion batteries. They wouldn't fit in my airplanes, they were of inconsistent shape, they were covered in heat-shrink blankets, they had balance cables of no use in flight, and they had unnecessarily heavy and long wires.  Printing the end caps (Brent's idea, I think) allowed space for cooling (not as necessary as I feared), allowed the balance connector to be mounted on the battery, allowed mounting provisions to be printed in, and made the overall battery shape consistent.  Consistent shape made mounting them easier.  I am still figuring out better ways of holding them down, and the closer tolerance of printed parts really helps.