Can you specify what batteries should be used to build the 3 and 4 battery packs for the Nymph? Which is preferred?

From : Don Stackhouse

Weight is EVERYTHING on the Nymph (or any other Mosquito class HLG), so the lighter the better. We recommend a 3-cell battery pack if your radio will function OK on the lower voltage. So far we've found that the Hitec 535, Hitec 555 and Berg-6 receivers work OK on 3 cells, as do the Hitec HS-50 servos.

The FMA receivers and the FMA and Cirrus servos (as well as the other GWS clones like them) do not seem to work well on 3 cells. For some reason their current draw goes way up, which results in drastically shortened battery life. As a result the airborne system ends up being heavier because of the need for a larger battery.

The cells we use are Sanyo N-50AAA's. You should be able to get them from any of the better battery suppliers.

What is the optimal airborne electric package for the Nymph? (e.g. Berg, 2 HS-60, 3 battery 50 MAh pack, etc.)

You've got it almost right, except the servos. Hitec HS-60's are WAY too big. We recommend the Hitec HS-50 "Feather" servos for the Nymph. The Hitec 555 receiver works fine, although the Berg-6 seems to be a bit lighter. Also, replace the antenna wire on the receiver with 30 guage wire (Radio Shack sells it) and use the longest of the two pushrods for the end of the antenna. Just clip off a length of antenna equal to the length of the pushrod wire, then solder the tip of the remaining antenna to the forward end of the pushrod. Make sure it clears the arm on the servo, and that it has enough slack arranged in the right direction that the motion of the pushrod won't cause it to fatigue and crack. These two antenna mods will save over 0.1 ounces!

Don Stackhouse
DJ Aerotech