IPS Ownership - My feedback
- Thread starter jcwads
- Start date
volvopaul
Well-Known Member
Tell me where the other 2 boxes are , I get so many enquiries for parts and boxes my spares are almost run out from the boxes beyond resurrection I’ve kept over the years .After a few years lurking unused in a garage ( quite common in the effette South, we dont keep coal in the bath either ) the little baby gearbox made from cast iron and other non ferrous materials , the word 'ferrous' comes from the Latin word 'ferrum,' which means 'iron, was sold to a buyer who popped over from Germany to collect , the handover took place in lonely deserted wind swept car park at Dover Docks.
The transfer of a rather heavy box from the back of an Audi to a Mercedes went unobserved by the security camera and/or it was to cold for them the come outside, we both bought some henchmen along for security purposes due to the value of the transaction.
Between OGs appalling German and the buyers little group we mustered enough understanding to complete the exchange and to explain where the nearest chip shop was.
Bring English , one is very reluctant to discuss matters of personal finance but can say the box was sold for an amount sufficient to fill a 1000L fuel tank to be found on the perfectly average type of vessel commonly found down here in the prosperous South.
Am aware of the location of two other "spare" gearboxes and of a third which could possibly be resurrected, howeve,r am sworn to silence unless being greeted with a very special handshake.
Some of this account may be entirely fictional or may have elements of truth.
A Merry Winterval to All.Even to those in the wastelands beyond the M25.
ari
Well-Known Member
Nope. The Rodman 41 was originally a shaft drive boat. They did indeed develop a new hull to go with the IPS installations, but the boat and the layout had been in production as a shaft drive boat for some years, so your wide ranging survey of one single boat to 'prove' that IPS is no more space efficient than shafts is somewhat flawed I'm afraid. It's not going to be if the boat was originally shaft drive in the first place, is it?
Your claims about outdrives being no more efficient than shafts unless at WOT are equally wide of the mark.
oldgit
Well-Known Member
Rodman 41. Shaft or IPS. Same length of boat with identical interior layout . Both feature that 3rd cabin in exactly the same location within the hull.Nope. The Rodman 41 was originally a shaft drive boat. They did indeed develop a new hull to go with the IPS installations, but the boat and the layout had been in production as a shaft drive boat for some years, so your wide ranging survey of one single boat to 'prove' that IPS is no more space efficient than shafts is somewhat flawed I'm afraid. It's not going to be if the boat was originally shaft drive in the first place, is it?
Your claims about outdrives being no more efficient than shafts unless at WOT are equally wide of the mark.
The lazerette and engine compartment have just swapped places.
Outdrive economy over shafts ?
Princess 33 2 x 125hp outdrives
Transocean 37 (Broom 37 hull ) 2 x 130 Hp Shaft
Fuel logs indicate more or less same fuel consumption from both boats, around 1000 hours on each boat
Grubble
Well-Known Member
To save time, lets all agree that the best (and only) boat for anyone to buy has to be one with shaft drives. The engines must be diesel and the boat itself must be a flybridge. Anything other than that will melt, catch fire, sink, explode, break down, cost a fortune, cause premature baldness and have too much canvas and too many poppers for anyone to use more than once. The above is true irrespective of where the boat will be kept, what use the boat will be put to, what budget the purchaser has and last but not least, what boats are on the market when and where the buyer is looking.
I'll ask the mods to make this a sticky.
ari
Well-Known Member
Yes exactly!! So your point 'I've been on one IPS boat and it was no bigger in terms of interior volume than a shaft drive boat' is indeed correct, but also irrelevant. Since that boat started life as a shaft drive boat the interior volume IS of a shaft drive boat, that didn't change when they starting fitting IPS drives.
Princess 33 with a pair of 125hp outdrives will obviously be poor on fuel as it is woefully underpowered as a planing boat. But (surely!) you know that... Try comparing apples with apples.
ari
Well-Known Member
oldgit
Well-Known Member
Planing boats ?
Both semi displacement hulls around 16/17 knots max on both.
Both around same length and weight and vintage
Both with 6 cylinder similar HP engines .
One with outdrives and one with shafts.
Similar hours run and virtually identical fuel consumption.
Apples with Apples ?
Weight of the underpowered Princess 33 5500 kilos with total of 250 hp
Weight of the Broom 37 . 8000 kilos with total of 260 hp
Similar hours run and virtually identical fuel consumption......QED.
ari
Well-Known Member
If it suits you to believe that shaft drives are as efficient as outdrives in a normal adequately powered planing boat then I wish you well with your agenda. You're wrong, but never let that stop you. Happy Christmas! 
boomerangben
Well-Known Member
33 and 37 nearly identical?Planing boats ?
Both semi displacement hulls around 16/17 knots max on both.
Both around same length and weight and vintage
Both with 6 cylinder similar HP engines .
One with outdrives and one with shafts.
Similar hours run and virtually identical fuel consumption.
Apples with Apples ?
Weight of the underpowered Princess 33 5500 kilos with total of 250 hp
Weight of the Broom 37 . 8000 kilos with total of 260 hp
Similar hours run and virtually identical fuel consumption......QED.
5500 and 8000kg nearly identical?
Not in my book they are not. Very different in resistance and propulsion terms and we haven’t even looked at differences in hull forms
mstsasrs
New Member
anyone have issues with ips 600 motor surging ? not sure whats going on . port engine reaches 2100 rpm and stops producing power. right engine reaches 2800 rpm.
port engine whistles like its spooling up then at 2100 rpm it sounds like it dumps all its boost. repeats cycle. 42'marquis
thanks in advance
port engine whistles like its spooling up then at 2100 rpm it sounds like it dumps all its boost. repeats cycle. 42'marquis
thanks in advance
marcochi76
Well-Known Member
It seems related to the engines, not the IPS drives.
It could be a simple issue like a dirty fuel line. Maybe check the fuel filters first?
or, a super dirty propeller, but that should be similar to the 2 engines
It could be a simple issue like a dirty fuel line. Maybe check the fuel filters first?
or, a super dirty propeller, but that should be similar to the 2 engines
PowerYachtBlog
Well-Known Member
I would also like to know to know the usage of both. I know owners which had a 37 footer and then had a fifty, first with outdrives KAD300, the other twin Volvo D12 715.
The usage was always a displacement speed run, three nautical miles to a nearby island and back.
This owner told me fuel consumption of the larger fifty footer in similar ten outings and returns, always in the same place was only twenty litres per hour more in the bigger vessel.
Later I was told that he used to plane the smaller 37ft to the area, and that the bigger one he always used in displacement speeds.
The usage was always a displacement speed run, three nautical miles to a nearby island and back.
This owner told me fuel consumption of the larger fifty footer in similar ten outings and returns, always in the same place was only twenty litres per hour more in the bigger vessel.
Later I was told that he used to plane the smaller 37ft to the area, and that the bigger one he always used in displacement speeds.
