If they are installed straight up and down they have a "shape" in the bottom that adds surface area and reduces buoyancy. Call it tunnels or........
Tunnel or no tunnel with pods ? Covered pretty well in the posts; Patent issues, marketing spin or ? Shaft angle is no issue with the pod -...
I have limited but some experience with the 3208 - A 1976 vintage will, I assume, be rated fairly conservative. Nothing wrong with this motor. I...
Cpt Dad, There is a method to the madness of trouble shooting a HE cooled marine engine. First, verify that the engine(s) is/are actually...
OK - Understand. Two engines developing the same problem at the same time is very unusual. The two engines cooling systems as well as...
Thank you for your constructive input Karl
The engines do not use variable turbo chargers. There are no parameter calibrations that can/should be done. “… Boat performed ok the first 200...
Understand and agree but still not impressed with the fuel consumption with Zeus given the size/weight of the GB. At 6.8 knots 2.2 nm/gal for...
In a PMY test from 2009 of the GB 41 and Zeus I see the economy at displacement speeds as disappointing: 10.8 knots yielding .84 nm/gal, 11.3...
34 years, not 7. SW filter on the pressure side has been used by Volvo since the introduction of the AQD40A in 1977. Karl
I like the lines and looks of the older Post too. You don't mention what brand/model engines are in it. Most (all ?) 42's of that vintage were...
Understand your comment regarding custom vs production. However, it would appear that this Spencer with all the "non-custom" widgets may be closer...
Capt J, Disagree a bit. IMO far more efficient than conventional drive yachts in this class. In going through my small library of published...
Got this link from a friend who knows a guy at volvo; Interior pics of the Spencer 70': http://volvopentatraining.com/spencer70/interior Karl
In the PMY article a target wet weight of 90,000 lbs was mentioned and at that weight 40 knots. I would be absolutely amazed if this boat came in...
The video link shows a video of Spencer's 43' with IPS - Not the 49'. I think they built three 43' - I had the good fortune to fish a couple of...
In one of the spring issues (Must have been May or June issue) of PMY there was and article about this project that showed the floor plan. Got...
The 49' Express had twin IPS900 - Won the Bahama Wahoo Championship. Spencer also had a 54' with triple IPS900 at OCWMO - Boats name was...
Don't know about the anchor doors but I'm assuming you are correct. The IPS drives pull in from the bottom. Karl
No - This is the IPS 70'. If you look close at the pic you can see the anchor door. As far as I know this is the only enclosed bridge Spencer...