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Super Vee 27 Run Times

Old 08-01-2007, 06:28 AM
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ka350kaptain
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Default Super Vee 27 Run Times

Looking at getting my first boat - a Super Vee 27. What kind of run times and what battery packs for those times? Thanks
Old 08-01-2007, 07:09 AM
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Default RE: Super Vee 27 Run Times

IB 4200's - 6-9 minutes
IB 3800's - 5-7 minutes
GP 3300's - 4-6 minutes

These were recorded using a Micro Data Logger and times were cut when batteries started to drop off.

Ryan
Old 08-01-2007, 10:37 AM
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Speederson
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Default RE: Super Vee 27 Run Times


ORIGINAL: ryan_t888

IB 4200's - 6-9 minutes
IB 3800's - 5-7 minutes
GP 3300's - 4-6 minutes

These were recorded using a Micro Data Logger and times were cut when batteries started to drop off.

Ryan
Just curious. What was the setup for these times? Prop, water condition etc... and what was the temps on the batts. 2 to 3 min spread is pretty big. 9 min is pretty damn good for a batt thats rated at 7 min. Max[IB4200s]
Old 08-01-2007, 11:24 AM
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Default RE: Super Vee 27 Run Times

Anything from 40mm - 46mm prop
Batteries were not monitored but always came back warm to the touch. Lake usually has small chop. My setup is always very dry.
The largest factor is throttle usage. I tend to hold WOT, while others who have driven my boat tend to enjoy half throttle.

If I remember correctly the 9 minute run was high 8's ( 8:45-8:55 ) and pulled just under 30 amps average according to the Data Logger. If I didn't lose all my graphs I could have posted them. I definitely was not at the wheel on this one.

9 min is pretty damn good for a batt thats rated at 7 min. Max[IB4200s]
My question for you is how can any battery be rated for a maximum discharge time? Just so you know, these figures are always provide along with a discharge rate. Most common is 35A. In a brushed 550 powered boat the IB 4200's last a good 12 minutes at WOT.

Ryan
Old 08-01-2007, 11:39 AM
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Default RE: Super Vee 27 Run Times

In a brushed 550 powered boat the IB 4200's last a good 12 minutes at WOT.

That maybe true but it aint gonna happen with the Brushless SV.
Old 08-01-2007, 12:23 PM
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Default RE: Super Vee 27 Run Times

My point was batteries do not have a maximum discharge time - rating. There's no such thing.

Ryan
Old 08-02-2007, 12:44 AM
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Default RE: Super Vee 27 Run Times


ORIGINAL: ryan_t888

My point was batteries do not have a maximum discharge time - rating. There's no such thing.

Ryan
Guess I missed something then. Sorry my bad.[] Im just a putz.[8D]

Heres a discharge graph on the 4500s. http://cheapbatterypacks.com./cellin...nvid=ELITE4500 Theres a time in there some where.

My point is you cant state those times with out the other info. Which you gave after I asked but is still vague. Anything from 40 to 46 prop. Batts were warm. What batts with what props with what times and speeds bla bla. See my point.

As you know props, batts, boat set up and water will all have an effect on times and speed.



Old 08-02-2007, 01:36 AM
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Default RE: Super Vee 27 Run Times


ORIGINAL: ka350kaptain

Looking at getting my first boat - a Super Vee 27. What kind of run times and what battery packs for those times? Thanks

See this thread for SV links. http://www.rcuniverse.com/forum/m_52..._1/key_/tm.htm

See this thread http://www.rcuniverse.com/forum/m_48...44/key_/tm.htm post 873 for info I posted On batts with a 642 prop. All conditions and info noted.
Old 08-02-2007, 07:35 AM
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Default RE: Super Vee 27 Run Times


ORIGINAL: Speederson
My point is you cant state those times with out the other info. Which you gave after I asked but is still vague. Anything from 40 to 46 prop. Batts were warm. What batts with what props with what times and speeds bla bla. See my point.
It's not necessary considering I provided a range that covers most combinations in both performance and driving habits. No matter what condition or props used, run time will fall in the ranges provided. The author of the thread is just getting in to boating and asked a general question. I'm not going to dump a load of information where it is not necessary, so I gave a general answer.

If you want to toss in the complete load of info, it would probably be wise to explain the reasons for fluctuation in run times.
eg - batt, esc, motor temps and speed vs prop size and cell quality.

Ryan
Old 08-02-2007, 10:43 AM
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Default RE: Super Vee 27 Run Times

ORIGINAL: ryan_t888


It's not necessary considering I provided a range that covers most combinations in both performance and driving habits. No matter what condition or props used, run time will fall in the ranges provided. The author of the thread is just getting in to boating and asked a general question. I'm not going to dump a load of information where it is not necessary, so I gave a general answer.

If you want to toss in the complete load of info, it would probably be wise to explain the reasons for fluctuation in run times.
eg - batt, esc, motor temps and speed vs prop size and cell quality.

Ryan
Ya the OP is just getting into it so the last thing he needs is T.M.I.[ToMuchInfo.]

You seem to have ALL the info why dont you toss it in????

"No matter what condition or props used, run time will fall in the ranges provided."

You must be kidding me right. Take your IB4200s in SV27 with a 645 and run them to the low side of your stated times which is 6Min. Use your data logger and post the results.

Old 08-02-2007, 10:47 AM
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Default RE: Super Vee 27 Run Times

smoke.
Old 08-02-2007, 11:19 AM
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Default RE: Super Vee 27 Run Times


ORIGINAL: Speederson
You must be kidding me right. Take your IB4200s in SV27 with a 645 and run them to the low side of your stated times which is 6Min. Use your data logger and post the results.
A pitch ratio of 6 is a lot for that size of prop.
The 6 min run was with an X445 from what I have here. Motor - 52C Batteries - 56C GPS - 57.4km/h motor start time was at 43 seconds. Motor end time was at 393 seconds. I believe that is somewhere around 6 minutes.

Now that the OP has that information, what will he do with it? Go out and buy a SV and put an X445 on? Let him first get a boat before going in to what very few do. He hasn't replied yet, he must have what he's looking for.

Ryan

Old 08-03-2007, 12:06 AM
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Default RE: Super Vee 27 Run Times

ORIGINAL: ryan_t888

A pitch ratio of 6 is a lot for that size of prop.
The 6 min run was with an X445 from what I have here. Motor - 52C Batteries - 56C GPS - 57.4km/h motor start time was at 43 seconds. Motor end time was at 393 seconds. I believe that is somewhere around 6 minutes.
Ryan
So what are you saying? I cant run my 645 for six minutes.[] If that is so then that makes this statement by you untrue.

"No matter what condition or props used, run time will fall in the ranges provided."
Old 08-03-2007, 07:11 AM
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Default RE: Super Vee 27 Run Times

Come on man. Why don't I just throw on my gasser 70-80mm prop then, if that's the way you are going to look at it? I should get a good 6minutes out of that, right? I like what you are working on here.

Ryan
Old 08-03-2007, 08:45 AM
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Default RE: Super Vee 27 Run Times

645 is a realistic prop for the boat, and needs to be cosidered. In fact popular. You just need to be carful.
Old 08-03-2007, 10:34 AM
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Default RE: Super Vee 27 Run Times


ORIGINAL: ryan_t888

Come on man. Why don't I just throw on my gasser 70-80mm prop then, if that's the way you are going to look at it? I should get a good 6minutes out of that, right? I like what you are working on here.
Ryan
I like it to. But you never said anything about a 70-80mm prop now did you? This is what you said.

ORIGINAL: ryan_t888

Anything from 40mm - 46mm prop
Batteries were not monitored but always came back warm to the touch. Lake usually has small chop. My setup is always very dry.
The largest factor is throttle usage. I tend to hold WOT, while others who have driven my boat tend to enjoy half throttle.
Ryan
A 45mm is smaller then the largest you listed.


ORIGINAL: ryan_t888
It's not necessary considering I provided a range that covers most combinations in both performance and driving habits. No matter what condition or props used, run time will fall in the ranges provided. The author of the thread is just getting in to boating and asked a general question. I'm not going to dump a load of information where it is not necessary, so I gave a general answer.
Ryan
I sure would like to see 9min run time on my IB4200WC packs but what prop do I use and what would be top speed. Guess that would be half throttle and not WOT all the time also.

General answers do nothing to educate and inform.[&o]


Old 08-03-2007, 11:05 AM
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Default RE: Super Vee 27 Run Times

The guy is not trying to pick out a prop for a SuperVee that he doesn't own. He wants to know what he could expect for the runtimes with certain batteries. At this point I'm only concerned abouth him picking out a boat vs what prop he should use to expect what run time, while maintaining cool batts/electronics ect.

I sure would like to see 9min run time on my IB4200WC packs but what prop do I use and what would be top speed. Guess that would be half throttle and not WOT all the time also.
Most commonly people new to boating don't run WOT until they feel confident enough. This will result in longer run times. Max speed would still be there.

Next time I'll let you cover the run time questions and I'll always grab the 2 vs 3 bladed prop threads. I have way more testing in that department and you have done more testing than me with batteries, heat and run time.

General answers do nothing to educate and inform.
Telling someone one prop ran for this amount of time and another prop ran for this amount of time doesn't do any good as well. It's only good if they understand the reasoning behind this.

Ryan
Old 08-03-2007, 11:36 AM
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Default RE: Super Vee 27 Run Times

Guys,
The horse is dead (and starting to smell). He asked how long a football field is and you are arguing weather to measure it in microns or angstroms. Move on, go test something. He's got enough info now if you didn't scare him away. He can begin to learn some on his own now.
Old 08-03-2007, 12:24 PM
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Default RE: Super Vee 27 Run Times

Well this horse never dies.[8D]

Ryan
Old 08-03-2007, 02:44 PM
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Default RE: Super Vee 27 Run Times

Well there's something wrong with the horse.

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