I'm new to this so all the help I can get would be great ......I want to convert my Showtime 90 to electric . I bought a E-flight 110 outrunner motor and need some info on batteries ? I have 6s4200 pack and 6s4900 for my T-Rex 600 heli can I use them or should I make some A123 packs ? Any help would be great ....Thanks

Your 6S packs are not what the motor will want, you want to go with an 8S to 10S set up. I doubt the motor will go with a 12S set up.

If someone can help with my build would be great . I have so far only an e-flite 110 motor , need advice on ESC , battery , and also prop size . I do want to do 3D

This is my first electric large build and I don't want to do it twice . Has anyone done a Hangar 9 Showtime 90 ?

I have an Eflite 110 on an old Modeltech Saphir II pattern plane (used to have a Bully 1.20 LS two-stroke / Bolly carbon muffler)). I have an 18x12 prop on it that has been sanded down to a 17x12. I have a cheap chinese high voltage speed control on it. I have used a variety of lipos (8 cell, 9 cell, and 10 cell). If I recall correctly, I am running around 55 amps. I have found that with Eflite motors (so have my friends), that you have to run the higher voltages to get them to produce. 8 cells don't cut it on my set up. 9 cells works fine for pattern but you won't be able to do much 3d. My plane weights 9.75 lbs with batteries. You will definitely want to use 10 cells. For 9 cells, I run three 3 cells in series, and for 8 and 10 cells, I run two batteries in series. Most standard speed controls are limited to 6 cell lipos. You will need a high voltage ("HV" version) to run 8 to 10 cells. I have 18C 4000 to 5000 mAh batteries which work fine for my set ups.

Kurt Bozarth

Kurt,

Thanks alot for the info that is what I wanted to here . Reading all this stuff just is not the same as someone out there that has tried it .

rolling p51,
It depends on the type flying you intend to do ..... and the lipos you use.
I have an E-Flite 110 in my Venus II, which will be only slightly lighter than your Showtime 90.
I have also converted a Showtime 90 about 3 years ago.
If you use Lipos that will hold 3.7V under a 65 amp load (like TP Extreme V2 3850's) then you can run 8S and something like a 17x10 prop.
For 15-20C lipo packs, you will need 9S.
Your ST 90 will weigh about 9 lbs with 8S and 10 lbs with 10S setups.
I'm currently running the 110 in my Venus II on 8S TP Extreme V2 3850's with a 3 blade APC pattern prop (15x 13.5) . It pulls 63 amps and puts out 1850 watts. This will give the ST90 "sparkling" performance.
Here's a link to my V2 setup:
http://www.rcgroups.com/forums/showt...t=Venus+II+110

Also, you might have a look at post #129 in this thread:
http://www.rcgroups.com/forums/showt...ht=Showtime+90

Ed

Anyone have a good starting point for a Castle HV85 ESC . I bought the software to program it and just wanted to know whats the best settings for a e-flight 110 motor powered by 8S 4200 and 10S4250

Basic Menu .....

Cutoff voltage = Auto Lipo

Cutoff type = Soft Cutoff

Brake Strength = 0% Disabled

Throttle Type = Airplane - Fixed Endpoints

Brake Delay = .8 sec

Direction = Forward

Brake Ramp = Immedieat

Advanced Menu

Motor Start Power = 45%

PWM Rate = 13 kHz

Throttle Responce = 5

Current Limiting = Insensitive

Motor Timing = Standard Advance

Follow throttle stick instructions when you plug in power.

Ed

Thanks Ed

What should the max RPM be at ? with a E18x8 . I tried my 10S4250 pack this weekend and it sounds like the prop is going to rip apart over 3/4 throttle . Do I need to run a different one with this pack ?

The E Flite 110 (as the specifications state) is really a 8S or 9S motor.
Read that as......8S if you have really good cells [hold 3.7 volts per cell under a 60-75 amp load]) ...... and 9S if you have so-so cells [that hold 3.5v per cell under a 60-70 amp load]. Personally, I would not put 10 cells on this motor. Something like a 17x8 on 8-9 cells will get you 7,500 to 8,200 RPM.
Ed