After reading about someone elses experience converting their shuttle from .30 size nitro to electric I decided that I had to try the same. I have an old Shuttle ZX that I tried flying several times about 6 or 7 years ago. I did not do too much damage to it and up till now it has been just sitting there taking up space. The conversion is fairly easy. Just take the nitro engine out along with fuel tank and any other items required to run the nitro engine. In my case I also took the frames apart to check the condition and clean the heli up the best that I could. I bought a mount that is designed to mount the electric motor so the output shaft is in the same location as the nitro engine's output shaft was. You even keep the clutch system. The list of parts That I used are:

Hacker c50-19xl motor. I got one on sale for $250
Hacker Master 77-O-Heli. ebay for $193
Hacker prog box. used, online for #35
Conversion motor mount. online $50
8 TP2100 batteries. Bishop Power Products $520 plus tax (az resident) For now I am only using 6 of them in 6s3p
3 feet of 14g wire for the battery wire harness
approx 10 male and female deans ultra connectors on the wire harness/batteries and speed controller
Hitec Electron 6 rx
Futaba GY-401 gyro
JR 1400mah nicad receiver battery 5 cell. (no bec in the system)
receiver on/off switch with y-connector for esc signal wire.
Two JR ferrite rings to reduce rf noise. one on the y-connector near the receiver and one on the esc wire near the y-connector
Deans antenna.
Futaba S-148 servo's. what we had in it when we started flying it years ago...
using a JR 8103a transmitter.

I tried flying it for the first time a couple of days ago. I did not notice that the swash plate was seperating before trying it. That caused some very strange things to happen but luckily it survived. After fixing the swashplate problem we tried it again and it did much better. We did get radio glitches and were forced to set it down to work them out. I relocated the receiver and added ferrite rings plus I swapped the full length antenna for a deans mounted to the left rear gear support. Today I changed the esc from normal throttle to governer mode and it was flying great! The rotor rpm was set to approx 1600 under load. Any more rpm than that and the heli started to make more noise from a high freq vibration. here are some pics of the heli. Hopefully I can get a video of it flying soon. approx. cost was $1200 not including the helicopter, tx, rx, servo's and gyro. YIKES! [X(]

Ok, I finally got some video. I uploaded to "putfile.com". Most of the very short video made it. Just the landing was cut off. It was a 4 1/2 minute flight that went pretty good for the second try at it. Due to the limitations at putfile.com the video is only about 40 seconds long. Check it out here: [link=http://media.putfile.com/e_Shuttle_06]e-Shuttle[/link]

update:

I have flown the shuttle around 5 to 7 flights. The longest was 6 1/2 minutes and to be honest, that is quite awhile for a single flight. The surprise is that the battery draw has been much less than I thought it would be. When I started the project I planned on 12 to 15 minute flights and I bought 8 tp2100's thinking that I would use them all at one time. Even when I flew for just under 7 minutes the total draw was 2000mah out of 6000 available. (I was only running 6 batteries at the time.) That means I could fly for 15 minutes with some room to spare using 6 batteries. Since I really don't plan on flying 15 minutes at a time, I decided to remove 2 batteries to save weight and now I have two full flight packs of 4 batteries each. I should be able to get a comfortable 8 minutes of flight time out of each set of 4 batteries with room to spare. The upshot of the whole thing is that if anyone wants to convert their 30-size nitro you don't have to buy as many batteries, which will keep the weight and initial costs down.

EDIT: I need to retract that last statement about using 4 batteries instead of 6. The extra margin of available battery power is worth the weight of the two additional batterys, at least that is my opinion after trying 4 batteries for a couple of flights...

I noticed that the pictures of the eShuttle were not coming up right away and thought that there was a computer problem causing it. As it turns out, they are just taking a long time to load. I tried to edit the first post to replace the pictures with some that would be uploaded to rcuniverse.com and then they would load instantly... since the edit feature is no longer available for the first post I will suggest opening the post and let it sit for a few minutes if the pictures don't show right away.