So while doing some web browsing on RCAF aircraft, I found the Lancaster again with the Ryan FireBee drones on them. This is of course a different Firebee than what we have in game. We have a BQM-34 FireBee. The model is supposed to be about 22 ft in length. Should fit on a Lancaster. Switch it from aircraft config to weapon config and some fiddling to get it into position on the Lancaster.
Here is the result. Never though about the Firebee being the wrong size after shooting them down many times in the distance.