How to Size Oar Length (Based on Paddle, Drift Boat, and Oarsman Characteristics) - Wooden Boat People2024-03-28T18:34:14Zhttp://woodenboatpeople.org/forum/topics/how-to-size-oar-length-based-on-paddle-drift-boat-and-oarsman?commentId=1312281%3AComment%3A120208&x=1&feed=yes&xn_auth=noGents, I can appreciate the m…tag:woodenboatpeople.org,2014-08-09:1312281:Comment:1202082014-08-09T21:30:49.560ZRobb Grubbhttp://woodenboatpeople.org/profile/RobbGrubb
<p>Gents, I can appreciate the math to take up a rainy Saturday afternoon, but as some others voice, it really is all about your individual needs, techniques, capabilities, boat width, side height, seat height, etc. and what and how you are going to row your boat down the river. The main elements that I can see from my 35 years of rowing flatwater and whitewater rivers (yes I will boast on this one, since I am very passionate about this subject), are to:</p>
<p>_ make sure you have enough…</p>
<p>Gents, I can appreciate the math to take up a rainy Saturday afternoon, but as some others voice, it really is all about your individual needs, techniques, capabilities, boat width, side height, seat height, etc. and what and how you are going to row your boat down the river. The main elements that I can see from my 35 years of rowing flatwater and whitewater rivers (yes I will boast on this one, since I am very passionate about this subject), are to:</p>
<p>_ make sure you have enough leverage from the oarlock to your hand to pull or push effectively (this means more or less oar length from the oarlock to the blade to determine good leverage),</p>
<p>_ your seat height / distance from oarlock matches the oar length / angle to comfortably row without wearing yourself out,</p>
<p>_ enough oarlock inside diameter to feather and ship your oar in and out / up and down to avoid obstacles,</p>
<p>_ enough spacing between your oar doughnut / stopper and your body so it can't sweep by your body and pin you (this means, keep your doughnut closer to your hands) This element is always dependent on individual taste on rowing against the doughnut stop or not. I personally "free float" and row not touching the stopper.</p>
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<p>Overall, sometimes you need a short oar for tight, technical, boney water and sometimes you need a long oar for cruising down class 1-11 rivers and lakes, sometimes you forget to pack your own oars and trade "all" of your beer to borrow some at the boat ramp...</p>
<p>Happy rowing, Robb</p>
<p><a href="http://www.RiverTraining.net" target="_blank">www.RiverTraining.net</a></p> The boat width is also a majo…tag:woodenboatpeople.org,2014-07-23:1312281:Comment:1200142014-07-23T13:24:08.890ZJayson Hayeshttp://woodenboatpeople.org/profile/JaysonHayes
<p>The boat width is also a major factor here and must also be considered, i have rowed many different size boats with alot of different oar length combo's over the years and i always tend to lean toward the longer oar length with exception with my current boat. I am going to have to agree with Larry though that you really need to test your theory and row a few different oar lengths and type, everyone has a little bit different rowing style and that also plays into oar length as well. As far…</p>
<p>The boat width is also a major factor here and must also be considered, i have rowed many different size boats with alot of different oar length combo's over the years and i always tend to lean toward the longer oar length with exception with my current boat. I am going to have to agree with Larry though that you really need to test your theory and row a few different oar lengths and type, everyone has a little bit different rowing style and that also plays into oar length as well. As far as oarlock angle, i have always kept the angle the same as the sides and never had a problem but would recommend that you go with the biggest diameter oarlock possible, this will allow for a greater angle to the oars when needing to lift your oars up over rocks and such and will give more flexibility to your rowing than the standard oarlock. Last year i bought some of Ken Helfrich's custom oarlocks and dont think i will ever use anything else ever again...........the range of motion that you have with a larger oarlock is pure freedom on the water</p> Holy smokes, that is some se…tag:woodenboatpeople.org,2014-07-23:1312281:Comment:1200102014-07-23T02:50:30.992Zlhedrickhttp://woodenboatpeople.org/profile/lhedrick
<p>Holy smokes, that is some serious work.</p>
<p>Just a minor problem with the idea. I run white water and class III fishing stuff with about 10 other boat builders. They all like different oar configurations and oar lengths. I am the odd fellow in that i pull 9 foot and 9 foot 6 oar lengths. All the reset are using 10 foot oars. Some use 10 foot ash oars that are like steel beams in that they have zero flex.</p>
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<p>This is not science but preference and that makes many…</p>
<p>Holy smokes, that is some serious work.</p>
<p>Just a minor problem with the idea. I run white water and class III fishing stuff with about 10 other boat builders. They all like different oar configurations and oar lengths. I am the odd fellow in that i pull 9 foot and 9 foot 6 oar lengths. All the reset are using 10 foot oars. Some use 10 foot ash oars that are like steel beams in that they have zero flex.</p>
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<p>This is not science but preference and that makes many experienced rowers wrong most of the time.</p>
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<p>Don't try to make this science. Row a bunch of different oars, aluminum, composite, wood, heavy and light and find what you like. This is not physics, is rowing. You might find that the oar you like doesn't fit the math.</p>
<p>Now matter, what I bet I am always wrong.</p> Sounds like a pretty awesome…tag:woodenboatpeople.org,2014-07-23:1312281:Comment:1200092014-07-23T00:44:17.364ZGuy Fredricksonhttp://woodenboatpeople.org/profile/GuyFredrickson
<p>Sounds like a pretty awesome summer, Rick! You're a good man to be helping our veterans. I picked up a new hobby this summer, shooting IDPA pistol matches. It's great fun!</p>
<p>Sounds like a pretty awesome summer, Rick! You're a good man to be helping our veterans. I picked up a new hobby this summer, shooting IDPA pistol matches. It's great fun!</p> Things are going well. I real…tag:woodenboatpeople.org,2014-07-22:1312281:Comment:1202342014-07-22T05:02:12.285ZRick Newmanhttp://woodenboatpeople.org/profile/RickNewman
<p>Things are going well. I really enjoyed my trip on the Colorado, it was a challenge and a dream come true. I just returned from fishing Kelly Creek and the North fork of the Clearwater River. Caught some nice cutthroats and rainbows. A couple of weeks ago fished the North Fork of the Coeur d' Alene and the St. Joe. Had better luck on the St. Joe. Didn't take the drift boat but still had fun.</p>
<p>Headed to Livingston, MT soon for a Project Healing Waters conference and the IFFF activity…</p>
<p>Things are going well. I really enjoyed my trip on the Colorado, it was a challenge and a dream come true. I just returned from fishing Kelly Creek and the North fork of the Clearwater River. Caught some nice cutthroats and rainbows. A couple of weeks ago fished the North Fork of the Coeur d' Alene and the St. Joe. Had better luck on the St. Joe. Didn't take the drift boat but still had fun.</p>
<p>Headed to Livingston, MT soon for a Project Healing Waters conference and the IFFF activity then float the Yellowstone for a photographic expedition for a client. We will do four days on the section the Lewis and Clark traveled upon.</p>
<p>Will take a veteran fishing in our annual Two Fly contest on the Yakima River where 25 teams fish for a day. A week later travel to the Seattle area for Salmon for Soldiers a one day salmon fishing trip for veterans. Hopefully some of the 1.6 million Chinook Salmon that are supposed to arrive soon will make it in my freezer.</p>
<p>After boating big water I want to deck in the bow and stern areas creating buoyancy chambers so I can do some more big water again. I realized how much I missed it.</p>
<p>So overall really busy and enjoying life and my boat, rivers and fishing.</p>
<p>Rick</p> Hi Rick,
I'm pretty pleased w…tag:woodenboatpeople.org,2014-07-22:1312281:Comment:1200962014-07-22T03:12:50.156ZGuy Fredricksonhttp://woodenboatpeople.org/profile/GuyFredrickson
<p><a href="http://storage.ning.com/topology/rest/1.0/file/get/2472833029?profile=original" target="_self"></a>Hi Rick,</p>
<p>I'm pretty pleased with the way the boat turned out. I did add a cleat (see picture) in order to better secure the anchor rope, particularly for those times when the anchor is raised and there is a Labrador retriever bouncing off the sides. Based on my experience so far, I wouldn't change anything regarding the design. It seems to handle well, but I'm a novice and…</p>
<p><a href="http://storage.ning.com/topology/rest/1.0/file/get/2472833029?profile=original" target="_self"></a>Hi Rick,</p>
<p>I'm pretty pleased with the way the boat turned out. I did add a cleat (see picture) in order to better secure the anchor rope, particularly for those times when the anchor is raised and there is a Labrador retriever bouncing off the sides. Based on my experience so far, I wouldn't change anything regarding the design. It seems to handle well, but I'm a novice and haven't run anything approaching difficult.</p>
<p>Otherwise I've been enjoying the summer in Idaho.</p>
<p>How are things with you?</p>
<p>Guy</p>
<p><a href="http://storage.ning.com/topology/rest/1.0/file/get/2472833029?profile=original" target="_self"><img width="721" class="align-full" src="http://storage.ning.com/topology/rest/1.0/file/get/2472833029?profile=RESIZE_1024x1024"/></a></p>
<p></p> Guy, when I get a chance I wi…tag:woodenboatpeople.org,2014-07-22:1312281:Comment:1199972014-07-22T02:30:12.621ZRick Newmanhttp://woodenboatpeople.org/profile/RickNewman
<p>Guy, when I get a chance I will check your ideas against the oars I use just to see how they measure up. While rowing a raft down the Colorado I was plagued by an oarlock stand that would not stay in place and it was rather strange to have it move in the big waves. </p>
<p>Chris, Robb's boat has quite tall sides and is also fairly wide. I hope he will chime in and alert us to: a. what the current oarlock angle is and b. what he changes it to.</p>
<p>Guy, how has your boat been working out?…</p>
<p>Guy, when I get a chance I will check your ideas against the oars I use just to see how they measure up. While rowing a raft down the Colorado I was plagued by an oarlock stand that would not stay in place and it was rather strange to have it move in the big waves. </p>
<p>Chris, Robb's boat has quite tall sides and is also fairly wide. I hope he will chime in and alert us to: a. what the current oarlock angle is and b. what he changes it to.</p>
<p>Guy, how has your boat been working out? It is working as planned? Any changes you would make?</p>
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<p>Rick N</p>
<p>PS I chose my oars based on price. Fifty dollars for a pair of Sawyers couldn't be beat. Of course I had to rebuild one and refinish both of them! My 16' Tatman, measured from stem to stern rows well with 8' 6" oars.</p> Let me explain further. Plea…tag:woodenboatpeople.org,2014-07-22:1312281:Comment:1199932014-07-22T01:28:53.788ZGuy Fredricksonhttp://woodenboatpeople.org/profile/GuyFredrickson
<p><font size="3">Let me explain further.</font><font size="3"> </font> <font size="3">Please forgive my nature, but I’m not a rule-of-thumb kind of guy.</font><font size="3"> </font> <font size="3">And there seem to be plenty rules-of-thumb out there regarding how to calculate/estimate oar length.</font><font size="3"> </font> <font size="3">So I figured that I’d try to develop a more rigorous approach to this problem that made sense to me.</font><font size="3"> …</font></p>
<p><font size="3">Let me explain further.</font><font size="3"> </font> <font size="3">Please forgive my nature, but I’m not a rule-of-thumb kind of guy.</font><font size="3"> </font> <font size="3">And there seem to be plenty rules-of-thumb out there regarding how to calculate/estimate oar length.</font><font size="3"> </font> <font size="3">So I figured that I’d try to develop a more rigorous approach to this problem that made sense to me.</font><font size="3"> </font> <font size="3">Certainly I’m not the first to come up with these equations; but that said, I’ve not seen them elsewhere when I was looking.</font><font size="3"> </font> <font size="3">They are probably just buried in the mountain of information and suggestions on this topic.</font></p>
<p><font size="3">Here’s how I see this working…</font></p>
<p><font size="3">Step 1: Locate two straight dowels (or some equivalent) long enough to reach the oar locks for this exercise.</font><font size="3"> </font> <font size="3">Now sit in your land-locked boat with the two dowels and pretend you are rowing.</font><font size="3"> </font> <font size="3">Based on what feels comfortable to you during this exercise, you should be able to take reasonable measurements of CD and FG.</font><font size="3"> </font> <font size="3">Some people like the ends of the oars to overlap; I prefer a gap as not to create a pinch-point for my fingers and hands.</font><font size="3"> </font> <font size="3">You probably don’t want to row so low as to knock your knees, or so high as to hit your face.</font><font size="3"> </font> <font size="3">About mid-chest is probably a comfortable position.</font></p>
<p><font size="3">Step 2: Next, standing next to your land-locked boat, measure GI and subtract a few inches to account for draft in order to get an estimate of GH.</font><font size="3"> </font> <font size="3">Alternately, you can float the boat and measure GH directly.</font><font size="3"> </font> <font size="3">But an estimate is probably good enough.</font><font size="3"> </font> <font size="3">Then add FG to GH to get FH.</font></p>
<p><font size="3">Step 3: Next, presuming you are purchasing oars, select the oars of interest and determine the paddle length, which is AB.</font><font size="3"> </font> <font size="3">In other words, AB is the length of the oar below the water line during a “normal” stroke.</font></p>
<p><font size="3">Step 4:</font><font size="3"> </font> <font size="3">Next, use AB, FH, CD, and FG to calculate oar length.</font><font size="3"> </font> <font size="3">It may be best to take this calculated measurement and round-up to the nearest ½-foot increment.</font><font size="3"> </font> <font size="3">This should give you a pretty good estimate for oar length.</font><font size="3"> </font> <font size="3">Consider it an unabridged rule-of-thumb.</font></p>
<p><font size="3">Of course, the best advice comes from Rick and Chris, which is basically “try it, before you buy it”.</font></p>
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<p></p> Rick . Well said. There are a…tag:woodenboatpeople.org,2014-07-21:1312281:Comment:1200912014-07-21T23:12:52.332Zchris towleshttp://woodenboatpeople.org/profile/christowles
Rick . Well said. There are a lot of variables to consider when selecting the right set of oars for your boat, and personal preferance and the rivers you row have a big part of it. The other thing you didn't mention directly was side panel height. One of the old threads i read talked about the diablo canyon II which had really high sides and a bad reputation for being hard to row. But if say you pretty much nailed it. Equations like this are certainly a good starting point, but in the end…
Rick . Well said. There are a lot of variables to consider when selecting the right set of oars for your boat, and personal preferance and the rivers you row have a big part of it. The other thing you didn't mention directly was side panel height. One of the old threads i read talked about the diablo canyon II which had really high sides and a bad reputation for being hard to row. But if say you pretty much nailed it. Equations like this are certainly a good starting point, but in the end personal preferance has a lot to do with it. Body geometry also plays into it. I can't imagine a 5'4" 120 lbs female would like the same set of oars as a dude that's clocking in at 6'4" 225 lbs with long arms. But Mabye they would. Hard to tell. But I think cockpit design and geometry is a personal preferance thing, just like mountain bikes. U find out what works and go with it. Other people get on your setup and will think it feels wierd because they are not used to it although it feels just right for you. Now go try your buddies setup and the roles reverse. Two additional variables to c…tag:woodenboatpeople.org,2014-07-21:1312281:Comment:1202292014-07-21T16:56:40.927ZRick Newmanhttp://woodenboatpeople.org/profile/RickNewman
<p>Two additional variables to consider: angle A, the angle of your oarlock and height S, the height of your seat. Angle A can be important as pointed out by Robb Grubb and others and I have to concur. In certain situations an oarsman needs to push the handles of his oars down enough to keep them out of the water to avoid obstacles or such. If your oarlock angle combined with the diameter of your oar wraps precludes full extraction from the water it can be problematic. The height of the seat in…</p>
<p>Two additional variables to consider: angle A, the angle of your oarlock and height S, the height of your seat. Angle A can be important as pointed out by Robb Grubb and others and I have to concur. In certain situations an oarsman needs to push the handles of his oars down enough to keep them out of the water to avoid obstacles or such. If your oarlock angle combined with the diameter of your oar wraps precludes full extraction from the water it can be problematic. The height of the seat in the drift boat can also create issues if it is too high causing issues with impingement of the oar handles upon the oarsmans knees or thighs.</p>
<p>While neither of these issues can relate directly to oar length they can indirectly affect the use of the oars thus impacting the length of oars that feel right to a particular person. Secondarily rowing styles and the rivers and the rapids a boat travels through or down also greatly affect selection.</p>
<p>An example would be rowing a shallow river with fairly steep gradient i.e. the Middle Fork of the Salmon requires an oarsman to not allow his downstream oar to interact with the river bottom causing broken oars, sprung oarlocks or an oar being shot from the boat like an arrow. Also because your are in shallow water it can be difficult to get enough bite with a partially submerged blade if the oar angle is steeper rather than more shallow. In this case I prefer a longer rather than shorter oar so I can get a full bite. Sawyer's Shoal Cut oars are another method of doing a similar thing to get a full bite in the water.</p>
<p>My point is there is no substitute for trying a variety of oar lengths in your own boat in the water you most often row in to find what works best for your style, the river(s) and your boats design. Multiple paths often lead to the same destination, each of us is free to find that path which works best for us.</p>
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<p>Rick N</p>