RE: Ranges of Futaba?
Ranges are not published for most of Futaba's receivers because their ranges exceed the visual limits for R/C airplanes. As long as you can see the model, you have control. This does not hold for the R114F micro and R124F ultra-micro receivers, which have a range of about 200 M; and the R146IP micro receiver, which has a 300 M range.
The R114F and R124F are 4-channel FM-PPM receivers, and the R146IP is a 6-channel FM-PCM receiver.