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Search: Posts Made By: CougarMarkus
Showing results 1 to 25 of 26
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Forum: General Boating Discussion
03-29-2026, 10:05 AM
Replies: 63
Views: 4,564
Posted By CougarMarkus

Plavutka are you actually German as well?

Plavutka are you actually German as well?
Forum: General Boating Discussion
03-29-2026, 10:01 AM
Replies: 63
Views: 4,564
Posted By CougarMarkus

Yes how ever we calculate it, but 10 gallon fuel...

Yes how ever we calculate it, but 10 gallon fuel powering a V8 would equal 100 kWh battery electric power is easy to remember and would be not so wrong.
Forum: General Boating Discussion
03-29-2026, 09:13 AM
Replies: 63
Views: 4,564
Posted By CougarMarkus

Hi Hogie_roll, I think it would be this way:...

Hi Hogie_roll, I think it would be this way: Your boat go with 50 gallons fuel at 3000 rpm (50gal x 1.96 mpg) 98 mls. When you go WOT it would be (50gal x 1.15=) 57,5 mls
50 gallons fuel equal 500...
Forum: General Boating Discussion
03-28-2026, 12:41 PM
Replies: 63
Views: 4,564
Posted By CougarMarkus

Plavutka, thanks for your Volvo data sheet. So...

Plavutka, thanks for your Volvo data sheet. So following calculations:


430 hp/h means 130l/h
1 liter fuel contains 9.3 kWh Energy
130l x 9.3 kWh = 1209 kWh
30% efficiency of the V8, then we...
Forum: General Boating Discussion
03-28-2026, 09:39 AM
Replies: 63
Views: 4,564
Posted By CougarMarkus

Hi JaayTeee, you are right side load I forgot...

Hi JaayTeee, you are right side load I forgot yet.

To All:
I would like to come back to the energy discussion. Is sombody here who has a boat with eg. Mercury 500R's and knows exactly how much...
Forum: General Boating Discussion
03-28-2026, 06:24 AM
Replies: 63
Views: 4,564
Posted By CougarMarkus

@ Plavutka: Concerning China. I was always a fan,...

@ Plavutka: Concerning China. I was always a fan, but since I orderer a metal laser cutter and laser welder in China which was was cought from German Custom and sent back I think different. The...
Forum: General Boating Discussion
03-28-2026, 05:50 AM
Replies: 63
Views: 4,564
Posted By CougarMarkus

https://cimg2.ibsrv.net/gimg/www.offshoreonly.com-...

https://cimg2.ibsrv.net/gimg/www.offshoreonly.com-vbulletin/916x1282/emrax_data_1b7b07450ec6c3f93cb7388ef88fedde21e30c52.jpg...
Forum: General Boating Discussion
03-28-2026, 05:45 AM
Replies: 63
Views: 4,564
Posted By CougarMarkus

https://cimg6.ibsrv.net/gimg/www.offshoreonly.com-...

https://cimg6.ibsrv.net/gimg/www.offshoreonly.com-vbulletin/1101x313/antriebe_hochgeklappt_747960f4b6718fbc534af3690eb967a502960c7f.jpg
Forum: General Boating Discussion
03-28-2026, 05:43 AM
Replies: 63
Views: 4,564
Posted By CougarMarkus

Conerning the motor design, my thought was that...

Conerning the motor design, my thought was that the motor should have similar torque and motor speed then most boats with Z-Drive have at the propshaft. The problem is that all motors I found on the...
Forum: General Boating Discussion
03-28-2026, 03:53 AM
Replies: 63
Views: 4,564
Posted By CougarMarkus

Unfortunately I can not upload a video. ...

Unfortunately I can not upload a video.
https://cimg6.ibsrv.net/gimg/www.offshoreonly.com-vbulletin/2000x926/img_7739_6aff3e7c65dbc35bcc7dc2ee5c2f8683b498f13d.png
Forum: General Boating Discussion
03-28-2026, 03:44 AM
Replies: 63
Views: 4,564
Posted By CougarMarkus

Hi Plavutka, you are with most thoughts...

Hi Plavutka,

you are with most thoughts right I think.
Battery pack manufacturing is not easy, ah and you forgot it’s also dangerous because there is always voltage. The Battery management is...
Forum: General Boating Discussion
03-27-2026, 01:36 PM
Replies: 63
Views: 4,564
Posted By CougarMarkus

https://cimg2.ibsrv.net/gimg/www.offshoreonly.com-...

https://cimg2.ibsrv.net/gimg/www.offshoreonly.com-vbulletin/1072x1468/borgwarner_sic_pp_239fb4d4e803758750681d10ce72a5acbea2a36c.jpg...
Forum: General Boating Discussion
03-27-2026, 01:33 PM
Replies: 63
Views: 4,564
Posted By CougarMarkus

Hi Andrew, thanks for the tip with the 21700...

Hi Andrew, thanks for the tip with the 21700 cells. You are right if the battery is that big it don't have to be the high current cell better less current and more capacity. I found a INR 21700-50S...
Forum: General Boating Discussion
03-26-2026, 04:19 PM
Replies: 63
Views: 4,564
Posted By CougarMarkus

Actually the cool thing would be 44 x 50 hp =...

Actually the cool thing would be 44 x 50 hp = 2200 hp. So the battery is capable to produce Energy up to 2200 hp. Unfortunately the motor controller I want to use can only handle 2X 320 kW.
Forum: General Boating Discussion
03-26-2026, 04:10 PM
Replies: 63
Views: 4,564
Posted By CougarMarkus

https://cimg7.ibsrv.net/gimg/www.offshoreonly.com-...

https://cimg7.ibsrv.net/gimg/www.offshoreonly.com-vbulletin/2000x1504/img_7728_63d0cd9d0067f697315977dc58dc9af9bdcdc324.jpeg
This is a Battery from the bike. 44 of these would be around 300 kWh. 600...
Forum: General Boating Discussion
03-26-2026, 04:00 PM
Replies: 63
Views: 4,564
Posted By CougarMarkus

The original idea of ​​an offshore power boat...

The original idea of ​​an offshore power boat going from Miami to the Bahamas and back will therefore no longer be possible. But anyway the boat is in Germany, electric drives would make it possible...
Forum: General Boating Discussion
03-26-2026, 01:05 PM
Replies: 63
Views: 4,564
Posted By CougarMarkus

Well the travel distance could be a problem....

Well the travel distance could be a problem. That’s why I began this thread with asking about the Cigarette AMG Electric Drive. But unfortunately nobody have ever seen here this boat in water. Maybe...
Forum: General Boating Discussion
03-26-2026, 11:37 AM
Replies: 63
Views: 4,564
Posted By CougarMarkus

Hi Ryan, the cooling will be done by...

Hi Ryan,

the cooling will be done by splashing water at the stern. I would connect a flexible hose between motor and old engine room, big enough to put in the 3 phase cables and make it breath...
Forum: General Boating Discussion
03-26-2026, 11:02 AM
Replies: 63
Views: 4,564
Posted By CougarMarkus

Hi Andrew, thank you for your answer. How...

Hi Andrew,

thank you for your answer. How many horsepower had the princeton electric speed boat?

The battery will be made by myself I guess, maybe 27200 Sony US VTC 6 cells, as I have written...
Forum: General Boating Discussion
03-26-2026, 10:40 AM
Replies: 63
Views: 4,564
Posted By CougarMarkus

Hi Plavutka, compared to the energy you have in a...

Hi Plavutka, compared to the energy you have in a 300 kWh Battery it is even worse - it's only 33 liters of fuel or 8,72 Gallons.
Forum: General Boating Discussion
03-26-2026, 05:46 AM
Replies: 63
Views: 4,564
Posted By CougarMarkus

Talking Hi there, I still have my 38 foot boat with...

Hi there,

I still have my 38 foot boat with two GM 502 here in Germany. After starting rebuilding the boat last year I found out that the V8’s need to be overhauled as well. For some years I was...
Forum: General Boating Discussion
03-26-2026, 04:05 AM
Replies: 63
Views: 4,564
Posted By CougarMarkus

https://cimg6.ibsrv.net/gimg/www.offshoreonly.com-...

https://cimg6.ibsrv.net/gimg/www.offshoreonly.com-vbulletin/2000x1504/img_6128_ef8a3fd1ca7e067f99355129904083447dce03b5.jpeg
Just a thought, Restauration of my 1988 twin 502 with two electric...
Forum: General Boating Discussion
03-25-2026, 04:24 PM
Replies: 63
Views: 4,564
Posted By CougarMarkus

https://cimg4.ibsrv.net/gimg/www.offshoreonly.com-...

https://cimg4.ibsrv.net/gimg/www.offshoreonly.com-vbulletin/1383x936/antrieb_10_5878c131b0ec9e624c2f5ff377edd435012d64d5.jpeg...
Forum: General Boating Discussion
01-02-2026, 04:00 PM
Replies: 63
Views: 4,564
Posted By CougarMarkus

Thank you, I thought maybe it is still existing...

Thank you, I thought maybe it is still existing somewhere with the electric parts. I guess it was only a study which was just for showing an not for driving. Actually the numbers with power, torque...
Forum: General Boating Discussion
01-01-2026, 09:31 AM
Replies: 63
Views: 4,564
Posted By CougarMarkus

Ah good to know, maybe a reason to visit the...

Ah good to know, maybe a reason to visit the museum. Thank you. I wonder if the boat have ever been in the water.
Showing results 1 to 25 of 26
 
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