R29S Performance

[Dcsqatar]

I received my new boat in July/2019. I was so busy enjoying it this summer, I did not conduct a comprehensive performance test. Before winterizing her, I discussed what a good baseline test should include with Volvo tech, and conducted it today. I wanted to share and discuss results, but I cannot figure out how to upload a PDF file of the results. Can files be attached to posts under General Technical Discussion? If so could someone tell me how. Thanks.

 

[baz]

I'd love to see the test results to compare with mine. PM Bruce Moore who will inform you how to post Photos in posts and/or in your Photo Album.

Alternatively see/goto http://www.tugnuts.com/viewtopic.php?f=2&t=11137&p=76277&hilit=Posting+photos#p76277

Examples...

 

[Bruce Moore]

I received my new boat in July/2019. I was so busy enjoying it this summer, I did not conduct a comprehensive performance test. Before winterizing her, I discussed what a good baseline test should include with Volvo tech, and conducted it today. I wanted to share and discuss results, but I cannot figure out how to upload a PDF file of the results. Can files be attached to posts under General Technical Discussion? If so could someone tell me how. Thanks.

You can’t upload attachments, but you can post jpg files hosted in your photo album or another publicly available host. Use the Img tag to share an image in your Tugnuts album, or the g2Img tag for any other public host.

Getting a User Photo Album for your Ranger Tug is easy but it requires submitting a request from within the site structure.

1. Sign on to the site. You’re probably signed on if you’re reading this.

2. Select the User Control Panel link from the upper left corner of any page. Note: On the home page, this link is in your user menu in the upper right.

3. Click the Usergroups tab, then select the radio button next to the User Albums group.
Scroll down, choose "Join selected" in the drop-down menu, and click the Submit button.

Once you do this, an email is automatically sent to the administrator (me). That message will trigger my ability to approve your request, and you'll receive an email indicating your membership in the User Albums group has been activated.

I'll watch for the message, and look forward to seeing your pictures.

Cheers,

Bruce

 

[Dcsqatar]

I hope I have successfully linked a photo of performance data I gathered recently on my new 29S. Optimally, I should have taken it sooner, but I was too busy enjoying my new tug.

It is my understanding that the best data to trend in order to assess the engine health is:

1. Engine speed (RPM) at max throttle.
2. “% Load” vs. RPM. % Load is an available parameter (a “gauge”) in the Volvo Penta ECS. As I understand it, it is essentially a measurement of torque (although I do not know how the ECS does it). Therefore deterioration over time would indicate reduced overall engine performance.
3. “Turbo Pressure” vs. RPM. Only pertinent at higher engine speeds. Deterioration would indicate turbocharger issues like deposit build up.

Fuel economy is a useful indicator of overall boat performance, but it is hard to trend effectively as it is influenced by so many things (engine, hull cleanliness, boat loading, current, wind, waves, etc.).

The trim tab performance data seems counter intuitive yet consistent with my experience. It shows that while trim tab deployment impacts hull angle, as expected, it has no apparent impact on hull speed and fuel economy at higher speeds. As expected trim tab deployment at slower speeds is detrimental.

I would appreciate any feedback.