Good Post Mariog! These pictures look surprising, but the weight of a Robinson-22 is essentially the same as the average dinghy.
The weight of an R-22 (pictured above) is approximately 850 lbs. The only reason I know this, is because I had one. It's hard to remember now, but I think the lift-off weight (fuel, pilot and passenger) was not suppose to exceed 1350 lbs. on the Robinson-22. It's been a few years, so my figures may be off.
I don't recall reading what Hatteras states as the maximum weight the flybridge aft deck can support, but the most popular dinghy to decorate these boats would undoubtedly be the 13' to 15' Boston Whaler. These boats weigh about 800-900 lbs. With a 50 hp outboard bolted to the transom, this weight would easily be over 1000 lbs. Essentially, about the same as an R-22.
Note to Gary @ ISM: you indicated you're client is looking to land an MD500-E on the back of yacht. This is a substantially heavier machine (1500 lbs+). Loaded with fuel and passengers, the MD500 will approach 3000 lbs. That's a significant amount of weight to place on an aft-deck housing... as well the overall vessel.
You may want to check with each yacht builder your client is considering. Maybe they can supply you with specs to help narrow down your search, or at the very least, suggest structural improvements to accomodate the weight.
Good pics Mariog. Brings back some memories, but I don't miss that squirrely little bird!
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