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Larry Wright
Junior Member
Username: Xljimmy
Post Number: 16
Registered: 03-2005
Posted From: 69.208.95.123
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, July 14, 2005 - 06:20 pm: | 
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If aatv only go around 4-6 mph in water does it realy help for the wheels to spin faster? If 30 mph on land equal 5 mph in water does 15 on land equal 2.5 on water or does it still do the 5? It seem that after a certain speed of the wheels spinning it wouldn't be doing much. Just wondering because I dont need alot of top speed on land. I would like to get 5mph in water so I was wondering if gearing it low would slow water travel. I have never drivin in water yet. |
Jerry R. Nuss
Intermediate Member
Username: Jerrynuss
Post Number: 58
Registered: 02-2005
Posted From: 70.106.197.83
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, July 15, 2005 - 12:43 am: |
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Water speed is related to the type of tires and their ability to paddle and the displacement and frontal area of the machine pushing through the water. The thing is basically a barge. The larger the diameter the tires the better.
When going through the water I normally run in the high range (Argo) maybe at around 1200 rpm on the motor. I don't have the water boiling up in from of the tires or churning up in the back. Sort of like a no wake speed in a boat.
Normally I run at around 1.2 mph by GPS. At full throttle I get up to 1.8 to 2.0 mph by GPS. There is a lot of splashing and engine rpm but no real great increase in speed. This is in an Argo Vanguard II with the Goodyear Runamuck tires and the typical load in the vehicle is around 500 to 600 pounds depending if the dog is onboard or not. Maybe with less weight it would displace less water and sit higher out of the water and have a higher speed. The dog can easily swim in circles around the machine while it is moving at full speed.
I have the machine in the water daily from an hour to 5 hours straight this past Sunday. Most of that time was drifting with the wind.
When I want to move faster I climb out on the bank and hit a trail. Crossing the lake can be a good shortcut but it is often quicker to drive around it. The water is a couple feet lower than normal so I also consider this and go slower. The bottom is limestone rock/boulder with excellent traction so it will grab on one side and cause the machine to do a quick 180 or lift that side up out of the water.
I have yet to see a 6x6 actually break 5 to 6 mph on tires alone. |
Larry Wright
Junior Member
Username: Xljimmy
Post Number: 17
Registered: 03-2005
Posted From: 69.208.95.123
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, July 17, 2005 - 11:21 am: |
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I guess I am asking if it is geared down to 10-15 mph on land will is still travel at its ussual water speed. After the max. water speed is abtained it seems that the tires would just be churning. |
Jerry R. Nuss
Intermediate Member
Username: Jerrynuss
Post Number: 59
Registered: 02-2005
Posted From: 70.106.194.64
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, July 17, 2005 - 07:12 pm: |
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You are correct after maximum water speed is obtained the wheels will just be spinning and making a lot of splashing and bubble foam without any more accelleration. The vehicle will actually become a little more unstable and steering will start to drift a bit.
What atv do you have? |
Larry Wright
Member
Username: Xljimmy
Post Number: 19
Registered: 03-2005
Posted From: 69.208.95.123
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, July 17, 2005 - 10:52 pm: |
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Thanks Jerry R. Nuss
I have an amphicat. I got it for $75. It was in pieces and some were missing. I read about using a riding lawnmower transaxle and brake steer. So I fabbed one in and got to drive it for 15 min. tops(if that) before the diff went out. I posted about it in the shop talk section under "amphicat remodel". I am not sure what I am doing about the drive for it now. I do have another older cast iron trans out of a rider I am thinking about using but am afraid of blowing the diff out of that to. Still planning.
That is why I was asking because I would hate to redo it and find out it needs more speed for it to move in the water.
Oh-ya, Those 15 min were a blast.
Larry |
Jerry R. Nuss
Intermediate Member
Username: Jerrynuss
Post Number: 61
Registered: 02-2005
Posted From: 70.106.206.216
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, July 18, 2005 - 06:40 pm: |
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Larry,
Ok I saw the pics of what you are working on. I think I remember you having knobby tires on it. Is that correct? If so it won't go in the water. You will need some different tires. Find some take of runamucks or some Carlisle chevrons. |
Larry Wright
Member
Username: Xljimmy
Post Number: 22
Registered: 03-2005
Posted From: 69.208.95.123
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, July 18, 2005 - 10:11 pm: |
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Yea I plan on getting the Carlisle chevrons. Just wanted to make sure I can get it up and running first. Did some looking around and found a place that had six for alittle over $200 buck plus shipping though. I dont think I can beat that. |
Shop Talk: Tech Tips and Q&A section