Prop wash effect

[Black Duck]

Guys and Girls, I could use your help, I am cross referencing what everybody has used and is useing and its capabilities. Please look and see if you would be willing to fill in the blanks from what your experience is using prop-wash. This would be very helpful for this new design. I have been working on in the DR with a guy that built like seven boats for GME in the past. Here is a spreadsheet. Thanks in advance you could send to [email protected] or text me 772-205-8184 or post here

 

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[Red_desert]

Nobody answered? From previous threads it really deepens on how deep you work. Too many blower problems if too deep. You hear about boats working as close as 10 feet from beach.

 

[O2ptima]

Nobody answered? From previous threads it really deepens on how deep you work. Too many blower problems if too deep. You hear about boats working as close as 10 feet from beach.

Perhaps ability to add sections as hole deepens

 

[Mackaydon]

When I had my boat (R/V Explorer--Roatan), the twin blowers worked effectively from 6 to 30 feet of water column.
Don in SoCal.

 

[Black Duck]

Thanks, any help would be appreciated, doing this new build, is out of norm but I think we have it figured out mostly just tweeting ideas again thanks

 

[marconi beach]

On Whydah we used them in up to 25 feet of sand with twin props very successfully.

 

[Red_desert]

If you study a lease map (such as the wreck near Douglas Beach) and it shows in blue the silver, red for gold. The most blue seems to pile up around where the cannons were found. The gold can be more random or even washed up the beach in spots.

 

[Black Duck]

Thanks, any help would be appreciated, doing this new build, is out of norm but I think we have it figured out mostly just tweeting ideas again thanks

Sorry tweaking, wanting to go with 60 inch blowers so 56 inch props

 

[ropesfish]

Guys and Girls, I could use your help, I am cross referencing what everybody has used and is useing and its capabilities. Please look and see if you would be willing to fill in the blanks from what your experience is using prop-wash. This would be very helpful for this new design. I have been working on in the DR with a guy that built like seven boats for GME in the past. Here is a spreadsheet. Thanks in advance you could send to [email protected] or text me 772-205-8184 or post here

Sorry Bobby- just saw this. Agflit can add in the Blue WaterRose specs if he sees this as well. This is on a Google Sheets template. I'll post the question in Shipwreck Hunters on FB and see if we get any more info.

Owner

Boat name

Make/ model

LOA

Beam

draft

Engine make/series/HP

No of engines

Gear ratio

shaft size

Prop diameter & pitch

No. of blades

Tube diameter

extension? Length?

Water depth

Sand depth

Hole dia.

Search&Salvage

Carib

Stamas

25'10"

9'

32"

(1st) Volvo TAMD70- 270 HP

1

1.5:1

1.5"

20" x 22"

3

34

no ext

15

15+

10

25

10+

10

32'

5' (long blow)

10+ top 4' bottom

Carib - eng 3

Cummins 6BTA

1

2:1

1.5

24 x 24

3

34

no ext

15

12-15

10

25

10+

10

30

10

10

Search &Salvage

Showdown

Bertram Conv.

38'

13'

48"

Cat 3208 -325 HP

2

2:1

1.75

26x25

3

30

no ext

15

15+

22-24

25

10+

24

30

10

25+

 

[Black Duck]

Sorry Bobby- just saw this. Agflit can add in the Blue WaterRose specs if he sees this as well. This is on a Google Sheets template. I'll post the question in Shipwreck Hunters on FB and see if we get any more info.

Owner

Boat name

Make/ model

LOA

Beam

draft

Engine make/series/HP

No of engines

Gear ratio

shaft size

Prop diameter & pitch

No. of blades

Tube diameter

extension? Length?

Water depth

Sand depth

Hole dia.

Search&Salvage

Carib

Stamas

25'10"

9'

32"

(1st) Volvo TAMD70- 270 HP

1

1.5:1

1.5"

20" x 22"

3

34

no ext

15

15+

10

25

10+

10

32'

5' (long blow)

10+ top 4' bottom

Carib - eng 3

Cummins 6BTA

1

2:1

1.5

24 x 24

3

34

no ext

15

12-15

10

25

10+

10

30

10

10

Search &Salvage

Showdown

Bertram Conv.

38'

13'

48"

Cat 3208 -325 HP

2

2:1

1.75

26x25

3

30

no ext

15

15+

22-24

25

10+

24

30

10

25+

Sorry Bobby- just saw this. Agflit can add in the Blue WaterRose specs if he sees this as well. This is on a Google Sheets template. I'll post the question in Shipwreck Hunters on FB and see if we get any more info.

Owner

Boat name

Make/ model

LOA

Beam

draft

Engine make/series/HP

No of engines

Gear ratio

shaft size

Prop diameter & pitch

No. of blades

Tube diameter

extension? Length?

Water depth

Sand depth

Hole dia.

Search&Salvage

Carib

Stamas

25'10"

9'

32"

(1st) Volvo TAMD70- 270 HP

1

1.5:1

1.5"

20" x 22"

3

34

no ext

15

15+

10

25

10+

10

32'

5' (long blow)

10+ top 4' bottom

Carib - eng 3

Cummins 6BTA

1

2:1

1.5

24 x 24

3

34

no ext

15

12-15

10

25

10+

10

30

10

10

Search &Salvage

Showdown

Bertram Conv.

38'

13'

48"

Cat 3208 -325 HP

2

2:1

1.75

26x25

3

30

no ext

15

15+

22-24

25

10+

24

30

10

25+

Thanks Ropefish, this data helps, please any more data would be great

 

[Darren in NC]

Mike Maguire just gave me this advice on blower construction for those who want to know:

Prop should be outside the tube not inside, because if it's inside it will cause vibration and cracks. Tube should be 6 inches larger than prop diameter, 3 inches per side. Prop should be 6-12 inches out from the blower itself.

 

[Black Duck]

Mike Maguire just gave me this advice on blower construction for those who want to know:

Prop should be outside the tube not inside, because if it's inside it will cause vibration and cracks. Tube should be 6 inches larger than prop diameter, 3 inches per side. Prop should be 6-12 inches out from the blower itself.

Good advise thanks