i,ve thought about this type of log loader alot why couldn,t you have a cradle to hold the log until you had it lifted then,have that cradle rigged to slide down the lifting arms??
i,de make it all hyrdrulic so it could be controled better.
you would lower the arms to the ground,roll the log on it and clamp it,raise the log/arms until the log was over the truck.lower the log/cradle down into the truck and release the log.you might have to roll the log around with a cant hook to place it on the truck.
i,de have a couple arms on it to keep the truck from rocking as you load it...like a real log loader.they would both be on the loader side of the truck.
IF ANYBODY runs with this idea and get's rich off it..don,t forget me or this forum...atleast cut me a few buck's for each one sold..