How fast does the Honda 2hp motor get the 170 going? Our shore house is on a canal about 1 mile from open water? Just wondering how long its going to take me to get to open water.
Honda Motor on Hunter 170
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6mph
Look up the link below and add your boat info to part 5. The following note is added to the free program "The material here is taken from an article by Dave Gerr NA in Sail (February 2001. pp. 81-84) entitled Sailing Screws. To really understand the numbers calculated below you should consult this article or his book Propeller Handbook. A note on the Maximum Sailing Speed calculated below: This is also from Gerr's work. He has determined that the classic formula for Hull Speed ( 1.34 Sqrt(LWL) ) does not always apply, the 1.34 is not a constant, leading to, in some cases, much higher speeds. However, Gerr observes: "For instance, a boat with a DL or 80 might have a SL multiplier of 2.11, but it couldn't achieve that speed under sail unless it had not just sufficient sail area, but the stability to stand up to such a sail area in the wind strengths needed to deliver the required power. Not an easy task!" To use this form, select a boat, enter a Horsepower and Prop Type." The result for your Hunter 170 was 6 mph. I did enter my boat for the 8 hp I have and the results were very close. In my case the 8hp powers the 22 footer faster than hull speed. This summer I will be going to a 6hp and expect to loose .7 mph. Be interesting to see the results. Is your boat really as fast as stated in the program? Good luck John
Look up the link below and add your boat info to part 5. The following note is added to the free program "The material here is taken from an article by Dave Gerr NA in Sail (February 2001. pp. 81-84) entitled Sailing Screws. To really understand the numbers calculated below you should consult this article or his book Propeller Handbook. A note on the Maximum Sailing Speed calculated below: This is also from Gerr's work. He has determined that the classic formula for Hull Speed ( 1.34 Sqrt(LWL) ) does not always apply, the 1.34 is not a constant, leading to, in some cases, much higher speeds. However, Gerr observes: "For instance, a boat with a DL or 80 might have a SL multiplier of 2.11, but it couldn't achieve that speed under sail unless it had not just sufficient sail area, but the stability to stand up to such a sail area in the wind strengths needed to deliver the required power. Not an easy task!" To use this form, select a boat, enter a Horsepower and Prop Type." The result for your Hunter 170 was 6 mph. I did enter my boat for the 8 hp I have and the results were very close. In my case the 8hp powers the 22 footer faster than hull speed. This summer I will be going to a 6hp and expect to loose .7 mph. Be interesting to see the results. Is your boat really as fast as stated in the program? Good luck John
Depends
While theory is great (I am an engineer) to give you a quick answer - about 5 to 5.5 knots. The speed was SOG based on my GPS. The variation, from what I can tell, is based on loading. When it was just myself, about 5.5 knots, when it was my g/f and I, about 5.3. Extra people or gear, 5.0 or slower. The boat is light enough and the motor small enough, that wind, waves, and sea state factor into the sustained speed. Hope this helps a little bit. And the over all formula (from basic boating course) 60*D = S*T D - diantace in NM S - speed in knots T - time in minutes. So, (60*D)/S = T or about 12 minutes.
While theory is great (I am an engineer) to give you a quick answer - about 5 to 5.5 knots. The speed was SOG based on my GPS. The variation, from what I can tell, is based on loading. When it was just myself, about 5.5 knots, when it was my g/f and I, about 5.3. Extra people or gear, 5.0 or slower. The boat is light enough and the motor small enough, that wind, waves, and sea state factor into the sustained speed. Hope this helps a little bit. And the over all formula (from basic boating course) 60*D = S*T D - diantace in NM S - speed in knots T - time in minutes. So, (60*D)/S = T or about 12 minutes.
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