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Showing results 1 to 25 of 148
Search took 0.01 seconds. Search: Posts Made By: Rumpi
Forum: Electrical: Batteries, Generators & Solar 15-03-2024, 12:37
Replies: 3
Views: 612
Posted By Rumpi
Re: Main engine as generator, which capable alternator?

Whatever 28V 200A+ truck alternator the used parts store has on offer will work. Mounting it is a different problem you probably need a different pulley to keep the engine rpms low. In the end it...
Forum: Monohull Sailboats 16-09-2023, 07:32
Replies: 41
Views: 6,333
Posted By Rumpi
Re: Sell, Give Away or Scrap Boat with a Blown Motor?

"Beyond repair" is a sales pitch. The Bukh DV20 is a wet sleeve engine with Bosch injection. Parts are still available for example https://www.lsm-diesel.dk/ and...
Forum: Monohull Sailboats 05-05-2023, 08:00
Replies: 7
Views: 714
Posted By Rumpi
Re: Replacement Inboard Diesel

Fortunately your problem is really simple, all base engines you might consider have industrial applications and mounting a hydraulic pump on them is routine. Your pump has an SAE shaft and mounting,...
Forum: Construction, Maintenance & Refit 11-04-2023, 08:30
Replies: 7
Views: 1,680
Posted By Rumpi
Re: Beneteau Composite Post Rudder Bearing

Adding more sealant between tube and shell is exactly how Beneteau wants you to adjust the bearing play. You need to clean the glueing surfaces perfectly, shiny bare metal on the sleeve and clean grp...
Forum: Construction, Maintenance & Refit 21-03-2023, 11:39
Replies: 39
Views: 5,378
Posted By Rumpi
Re: Headliner material

The industry has developed anti graffiti protection in the form of films or coatings. I don't know wich one will adhere to your chosen substrate, but most of them do work as advertised, permanent...
Forum: Engines and Propulsion Systems 01-03-2023, 06:51
Replies: 31
Views: 4,672
Posted By Rumpi
Re: Lighter vs heavier diesel engine

Sorry, I should take some of my own medicine, the Lombardini has a cast iron block with Al cylinder head and pan, it's not completely Al. The OHC unit injection system was buildt in millions by VW...
Forum: Engines and Propulsion Systems 28-02-2023, 19:35
Replies: 31
Views: 4,672
Posted By Rumpi
Re: Lighter vs heavier diesel engine

Go back and read again, this time more carefully, so you can compare apples to apples. For example the Lombardini is a 2 cylinder engine and all others are 3 cylinder ones.
The 3YM20 dry weight...
Forum: Auxiliary Equipment & Dinghy 15-02-2023, 00:22
Replies: 34
Views: 6,842
Posted By Rumpi
Re: RIB Salvage Project, glue for PVC inflatable.

Contact cements: Plastigum 77, Sabacontact 70T, technicoll 8002 They all cost around 30€/l in 1l tins (250g or 350g also available but more expensive) plus shipping (9-30€) available from a variety...
Forum: Deck hardware: Rigging, Sails & Hoisting 27-01-2023, 19:59
Replies: 84
Views: 4,635
Posted By Rumpi
Re: I have to move the mast again. But now it’s 64ft.

Chotu, WTF?!!! You have a friggin catamaran, why would you need cradles to transport a mast? Just lash it under the frigging deck and be done with it!

Uber to the hardware store, get some ratchet...
Forum: Construction, Maintenance & Refit 21-10-2022, 05:16
Replies: 123
Views: 7,453
Posted By Rumpi
Re: Could use a little advice. Aluminum or Fiberglass for this?

None of the above, those only work if you actually run the numbers. For seat of the pants engineering you need to approach it differently. First is compression, you solve that with a straight metal...
Forum: Construction, Maintenance & Refit 24-09-2022, 19:27
Replies: 8
Views: 873
Posted By Rumpi
Re: Rusty keel bolts, buy or walk away

My brochure says the keel is cast iron, overlayed with glass and polyester resin, aka. encapsulated keel. I understand there is also a bulb finn version, I believe also cast iron.

On a boat of...
Forum: Multihull Sailboats 24-09-2022, 17:40
Replies: 13
Views: 924
Posted By Rumpi
Re: Bushings on your forward crossbeams?

Yes it will hold for a while. Worst thing that can happen is that play develops and the hole in the Al deforms and becomes oval. Monitor the situation and take appropriate action.

The bushing is...
Forum: Multihull Sailboats 24-09-2022, 11:28
Replies: 13
Views: 924
Posted By Rumpi
Re: Bushings on your forward crossbeams?

The bushing should be stainless, hydraulically pressed in. After the pin gets installed everything gets smothered with duralac.
Forum: Construction, Maintenance & Refit 24-09-2022, 11:20
Replies: 89
Views: 7,769
Posted By Rumpi
Re: 304 vs 316 on deck

The above is only true if the fabricator can restore temper after welding, otherwise welded 6061 is to be assumed at 165MPa. And the preferred alloy for this application would be a 5 series one, not...
Forum: Dollars & Cents 21-09-2022, 08:43
Replies: 45
Views: 4,095
Posted By Rumpi
Re: I need some basic no nonsense information about my first yacht please

Here is my view:

1. Learning to sail: this is easy, take some courses. Besides actual sail training what's really important is boat handling in different situations. How to dock in different...
Forum: Construction, Maintenance & Refit 10-09-2022, 13:12
Replies: 16
Views: 1,109
Posted By Rumpi
Re: The 3 Resins over Plywood

Saturate all exposed edges (holes included) with thin cyanoacrylate (aka. Superglue), then paint. It might be prudent to use a harder ply like meranti or sapeli, the weight increase is minimal for a...
Forum: Flotsam & Sailing Miscellany 27-08-2022, 19:34
Replies: 150
Views: 11,547
Posted By Rumpi
Re: A Realization

I am not confusing anything, but I won't try to convince you. You do what you feel is right, people have provided you with enough options.

I can imagine plenty of scenarios of epoxy release, take...
Forum: Flotsam & Sailing Miscellany 27-08-2022, 19:15
Replies: 150
Views: 11,547
Posted By Rumpi
Re: A Realization

You are confusing a machining shop with a fabrication shop. A fabrication shop should ideally be able to do all operations from raw billet to finished piece, but a machine shop is specialized in one...
Forum: Flotsam & Sailing Miscellany 26-08-2022, 20:10
Replies: 150
Views: 11,547
Posted By Rumpi
Re: A Realization

Cutting into the boat is a stupid ideea. How exactly do you plan to insert the beam onto the composite chainplates, spread the bows out with a hydraulic jack until the beam fits? Or letting in a box...
Forum: Flotsam & Sailing Miscellany 26-08-2022, 19:08
Replies: 150
Views: 11,547
Posted By Rumpi
Re: A Realization

The reason nobody has done anything about those "stupid little metal things" is because you did not supply the needed info, and don't even know what to ask for. First of all, your drawings are...
Forum: Construction, Maintenance & Refit 16-03-2022, 11:53
Replies: 104
Views: 7,595
Posted By Rumpi
Re: Would anyone be willing to help me interpret chainplate plans?

1. It goes trough the deck, right to the "reinforced deck plate" ("exits cabinside")
2. All bolts go trough the hull ("typical")
3. A steel or fiberglass plate, formed to the hull, it seals the...
Forum: Construction, Maintenance & Refit 16-03-2022, 06:37
Replies: 104
Views: 7,595
Posted By Rumpi
Re: Would anyone be willing to help me interpret chainplate plans?

Just stop second guessing the designer and build as drawn. The instructions are clear, even if brief. Laminate the required layers on the outside and inside. If needed, grind the inside flat where...
Forum: Engines and Propulsion Systems 20-02-2022, 21:05
Replies: 220
Views: 19,320
Posted By Rumpi
Re: What is the Absolute Lightest Propulsion Available?

Shovel (folding, army surplus), big sturdy plastic bags, zipties. Burry the outboard and inflatable, take a gps mark on your phone, ride away with the shovel. Lightest option, the shovel only weighs...
Forum: Engines and Propulsion Systems 20-02-2022, 17:50
Replies: 220
Views: 19,320
Posted By Rumpi
Re: What is the Absolute Lightest Propulsion Available?

Well, buy a packraft strap it to the bike and throw it into the water. In the the absence of a crane that's about the only method available to you, push it over the side of the tramp. If the raft is...
Forum: Engines and Propulsion Systems 20-02-2022, 16:00
Replies: 220
Views: 19,320
Posted By Rumpi
Re: What is the Absolute Lightest Propulsion Available?

I don't know where you want to cruise, what motorcycle you have, or how you're imagining things to work, since you have not shared such info.
But if you think getting the bike on shore by yourself...
Showing results 1 to 25 of 148
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