Aspire EP Power System

Update: I have now installed Sanyo CP1300SCR cells. See bottom of this page for a photo of this installation. 

The above photo shows the Speed 600 motor with the original 9-cell KR600AE pack. I do not recommend these cells. Go with the Sanyo CP1300SCRs. You will not be dissapointed!

To complete the mounting of the power system I did the following:
  1. I routed out former F4 to be slightly larger than the width of the battery pack. I then epoxied a 1/8" light plywood battery base (Note: not needed for CP1300 cells!) just above the fuse floor on stand-off about 1/4" high. Note that this rework was done for the 480 motor which was considerably lighter than the 600. The above position of the motor and battery result in a balance point at the forward-most point. The use of heavier batteries will dictate a more rearward, or stock, location for the pack.
  2. I mounted velco to the front and rear of the battery base and to the corresponding locations on the battery pack. This has proven to be a reliable means of holding the battery in place.
  3. As seen in the above photo, I made a small switch plate for the ESC switch. The switch is quite small, so I had to remove a chunk of the fuse and replace it with the ply switch plate. The plate is flush with the outside of the fuse and was covered with white iron-on film.
  4. I soldered Sermos connectors to the power inputs of the ESC. I then soldered the ESC directly to the motor and mounted it.
  5. The propeller is mounted after the canopy mounting method is reworked.

 

This photo shows the installation of the new CP1300SCR cells in an 8-cell pack. 

5/24/02 - Update

Above is an updated photo of the newly installed CP1300 SCR cells. I am using a more standard 8-cell pack compared to the 9-cell pack of KR600AEs. The performance of these cells has been fantastic! They are heavier and larger and necessitated a movement to a more "stock" location.

The battery in a side-by-side configuration is easily slipped into place with the wing mounted. The rear and mid-section of the pack is held in position with some 1/4" balsa stock. The front of the pack is held in position by a strip of Velco that is wrapped around the front wing hold-down dowel. The standard size RX was placed underneath the rear of the battery tray. With a square of 1/8" foam underneath, it was a nice interference fit. The servo leads protrude up through the rear of the battery tray cut-out. The antenna was trailed out the back of the fuselage. The Hobbico Air Alert was mounted under the right with the buzzer exposed to the air for maximum transmission of sound.

I used mini-servos because I wanted to save weight for the 480 setup and avoid a tail-heavy condition. Now with the heavier 600 motor, standard servos would be fine.

 

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