Whiplash P Sport Hydro Build

[jfrancisco892]

I am going to mount the esc between the batteries and the motor..it just fits. I am going to start with a grimracer 42x55. Thanks for your input.

[Tunda]

Cool vid Bro..........

[jfrancisco892]

Cool vid Bro..........

Thanks!

[Shooter]

I can't believe it took me this long to find this thread! Nice job! I love the video idea!

[jfrancisco892]

I can't believe it took me this long to find this thread! Nice job! I love the video idea!

Thanks man. I didn't want to deal with the typing out of all the descriptions and posting all the pics. I thought this was easier and something a little different.

[Shooter]

I suppose we will have to agree to disagree. I talked with pete and he had some good tips on how to secure the liner so that it doesn't spin up into the collet. I also don't like the idea of the flex cable having direct contact with the brass tube. It seems like a lot more friction that is averted when a teflon liner is used.

Mike's boat beats my boat 3 ways to Sunday, yet you take my advice....I love you man!!!

[jfrancisco892]

Mike's boat beats my boat 3 ways to Sunday, yet you take my advice....I love you man!!!

You took some bad advice from me. I feel the deed has to be repaid. Jk lol. But on mike's stealth he runs a Teflon liner.

[longballlumber]

You guys crack me up LOL

I will not be running Teflon in any of my NEW builds. I don't run Teflon in my Q sport hydro AND it has an S bend. No one has been able to convince me that Teflon has less friction (AKA faster) than a non-lined stuffing tube (assuming everything else is equal).

About the S vs. the J bend... Ask yourself this, in conditions that have a very long drive shaft or "prop shaft" (think heavy capacity, long wheelbase trucks) nearly all of them have a "shaft" carrier bearing at some point along the length of the drive shaft. Why would they do that? I am thinking to support the shaft and minimizing flexing (shaft whip)?

Our flex shafts are the same only worse because they are more flexible meaning they need to be supported; hence an “S” bend where it is supported better than a “J” bend.

I will also say there are many boat out there that are very fast with a “J” bend and Teflon… That is what makes this hobby so great!

Later,
Mike

[jfrancisco892]

You guys crack me up LOL

I will not be running Teflon in any of my NEW builds. I don't run Teflon in my Q sport hydro AND it has an S bend. No one has been able to convince me that Teflon has less friction (AKA faster) than a non-lined stuffing tube (assuming everything else is equal).

About the S vs. the J bend... Ask yourself this, in conditions that have a very long drive shaft or "prop shaft" (think heavy capacity, long wheelbase trucks) nearly all of them have a "shaft" carrier bearing at some point along the length of the drive shaft. Why would they do that? I am thinking to support the shaft and minimizing flexing (shaft whip)?

Our flex shafts are the same only worse because they are more flexible meaning they need to be supported; hence an “S” bend where it is supported better than a “J” bend.

I will also say there are many boat out there that are very fast with a “J” bend and Teflon… That is what makes this hobby so great!

Later,
Mike

Hope we are not cracking you up in a bad way. Your points definitely do have some validity to them. I was thinking about the long shaft needing support and I though of a driveshaft and I feel it resembles more of a J bend than anything but everyone has a different opinion. Just out of curiousity did you ever think that an S bend may cause more resistance through its support than a J bend. We could talk about this all day lol. When it boils down to it you have been in the hobby far longer than I have and know a lot more about it than I do. And your boats will kick my butt lol. But anyway, you're probably the person to trust in this situation. Just how I look at the flex shaft scenario.

[longballlumber]

No worries here jimmy... Regardless of J's, S's, Teflon, or no Teflon it's all good. The ingenuity is the part I like best about this hobby. As much as we think we understand the variables, there are plenty more to follow making us scratch our heads... Just ask Terry about tail feathers on the back of a hydro, and I will be he will tell you how much he under estimated the impact of the handling on his boat. No matter our experience level we all learn new stuff all the time.

Later,
Mike

[jfrancisco892]

No worries here jimmy... Regardless of J's, S's, Teflon, or no Teflon it's all good. The ingenuity is the part I like best about this hobby. As much as we think we understand the variables, there are plenty more to follow making us scratch our heads... Just ask Terry about tail feathers on the back of a hydro, and I will be he will tell you how much he under estimated the impact of the handling on his boat. No matter our experience level we all learn new stuff all the time.

Later,
Mike

Let's stop bs'ing and get ready to race! lol

[Shooter]

But bs'ing is the best thing about this forum!!

Hey, I just watched the end of the 2nd vid. I can't believe there was a 0.030" difference between the mount spacing....and they were on an angle???? That looks like a south river mount. I've never had any problems with them. Jim's stuff is always top notch!!! You should contact him and let him know.

As for teflon, I've never noticed a difference between 'with' or 'without', myself. I still run with it though. I do favor teflon with the 0.187 for sure because the recommended brass is a very loose fit....I never liked that.

Mike - That's a great point regarding shaft support. It would seem that the cable would 'find support' and rub along the sidewall somewhere, even if the stuffing tube was straight, just due to the torque in the cable. Your S provides more support...maybe even the 'natural' form of the cable while in operation. The question might be how many of those 'support' locations do you want to force? Too little and you get the whip action and instability. To many and you increase friction/drag/heat. Interesting stuff....

[jfrancisco892]

I'll let him know about the mount. Gonna be a mad thrash on Wednesday to try to get her ready for open water on Thursday. Still need to get the esc though. Hopefully it comes by Wednesday. I am almost convinced that when done correctly it doesn't matter if you do a j or s bend or Teflon or no Teflon. I've seen fast boats with all of those different setups. Perhaps we are thinking about it more than we should.

Anyway I'm pumped for this weekend. Should be a lot of fun just pray the weather cooperates.

[madmikepags]

The S bend has been proven time and time again to be the superior way to go, oh or wait was it the J??? crap I cant remember, I have probably equal amounts of boats with each!!! But I did have a big cat once that had a J bend setup, and it kept breaking flex cables, I changed the motor mount put a slight s in and it never broke a cable again. I am also moving away from teflon, My LSO has been tearing through motors, I couldn't figure out why? It's probably the lightest LSO on the planet and it's under propped but there's always smoke inside when I run it but not burnt electric smoke. The teflon liner was spinning inside the brass tube and causing binding the tube was so hot the brass was untouchable. Removed the teflon the boat is faster than ever and no smokey!!!!!!!

[longballlumber]

The teflon liner was spinning inside the brass tube and causing binding the tube was so hot the brass was untouchable. Removed the teflon the boat is faster than ever and no smokey!!!!!!!

THAT is exactly why, I won't be using Teflon in any of my new builds.

Later,
Mike