SV27 Props

[Darin Jordan]

I would try to keep your cells under 150 or 160 degrees... My race cells used to get up to 180, but they wouldn't last long at those temps...


Guys... I know it's difficult for some to consider, but I would REALLY advise you guys give up on this NiMH deal with these, and just make the plunge into Lipos...

A pair of MaxAmps 4000 or 5000 or ??? mah 2S1P Lipo packs with Deans connectors will give you more power than any pair of 7-cell Nimh packs, WAY less heat, and WAY more runtime... WAY more speed... WAY more useful cycles... WAY easier charging... WAY...

You are fighting an uphill battle with NiMh on all fronts... They are heavy, short lived, have high resistance... have to be "peaked" get to prime performance... and don't, can't, and will NOT provide the same power as an equivalent Lipo pack...

I've run mine in P-Mono heat races with not other mods than a HUGE prop, a bigger turn-fin, and a pair of 2S1P 3300 mah Lipos... and it's a ROCKET... Quick, Fast, and Stable... It's even faster with the 2S1P 4500mah 30C packs I tried last time out...

If you insist on using NiMH... you are going to be limited on prop size, and if you are buying "cheap" sport packs, then they are going to run warmer... that's what makes them "sport" packs... more internal resistance and less peak V...

I know money is tight... but I'm telling you... a one-time investment in an approriate set of Lipos, which can be charged on any Triton 2 or ICE charger, will pay back big time in longevity and performance...

[SJFE]

With all do respect DJ,
You will have to pry my BattlePacks out from between my cold dead fingers:D..lol

[avengersteve]

what about 3 blade props?
Pros
COns?

[hookedup]

No-No-No.... it's pretty easy...

I use a bench-mounted disc sander to sand down the pointed tip, then use that now flat surface to set the prop on while I carefully drill/ream out the threaded portion to fit a 3/16" shaft... Then use my Dremel with a cutting wheel on it to cut out the slot for the drive dog... DONE... Takes about 5-minutes each

yes, thanks darin, i tried it just like you said and it was pretty easy. way faster than a metal prop. i kind of tore up the groove for the drive dog, but it works.

[ice329]

I picked up a few props from OSE. I wanted to balance/sharpen and polish them myself. I dug in and compleated the job last night on both props. It was.... not hard but not easy and who knows if I did it as good as a expert but I think there more then acceptable. Anyways I got a X642 and a M445. I tryed both props with differnt set ups in the SV today. Both ran smooth with no vibrations. The X642 is a much more stable prop then the M445 but I have to say there is a clear winner between the two. The M445 although not as stable, is my choice with 6 or seven cells. I charged up my LiPo's.... A stock SV with a pair of LiPo's and a M445 is by far the fastest most radical set up I ran so far. Its SICK fast. You definatly need to trim down.

For the guy who wants a radical/quick/fast beast SV27, how ever you want to describe it, the M445 and a set of the IB3600's or LiPo's !

[pugman2]

how does the 440 that grim recomends rate i havent tryed anything acept stock yet im running ib 3600s

[Jeepers]

ICE329 the props you got, X642 & an m545, 445 the differnce is diameter and pitch, look on this site at the propellers, steve has the numbers listed for each prop so that should help. oh we have found that the M series props are thicker and heavier than X series props and our setups were getting hot using M props (180dg) x props (120dg) so most of us make M series props out of Xseries props.

[ozboater]

just curious.. would you guys recommend the CF48 for all round use ?? i like the way it goes, especially off the mark, but it sure does heat the motor up... as a rule of thumb, what would be the max temp i d wanna have on this motor without long or short term damage :)

[Steven Vaccaro]

I ran one yesterday. The 48 is much faster and does pull more amps. The 45mm is a better choice for my kids sv boats, because I have better take off with less torque roll. Means less time for me chasing flipped boats.

[ozboater]

steven, have you noticed much overall difference between the CF48 and 45 ?

[SJFE]

I noticed the 48 was harded on the stock power system temp wise with not all that much gain in speed. I am out of the loop now after the up grade....Back to square one.

[Steven Vaccaro]

steven, have you noticed much overall difference between the CF48 and 45 ?

The 45 is slower. The kids like to see me try to fit my fat butt into the tiny kayak so they don't mind flipping them. So I have to practice restraint and prop down. That's much of why I use it on the kids boats. This boat runs great at 30mph. Its tough to flip at that speed. I like to run mine on the edge with the 48, or better yet a x642 is my favorite.

[ozboater]

thanks for the info... excuse my ignorance, but the x642 is a 2 bladed prop yeah ?? how would you compare the x642 to the CF48 ??

stoked newbie here :)... appreciate the fast shipping on the goodies i ordered as well.. top notch service...

cheers

[longballlumber]

Hello All,

I have read the entire prop thread for the SV27, but I don’t have a clear suggestion for relative choppy water. What prop has been working the best in choppy water?

Thanks
Mike

[Steven Vaccaro]

Slow the boat down. We run on a huge lake in New Hampshire. If we tried to run a 40mph boat on this lake it would be upside down 90% of the time. I run a 45mm carbon prop. Its faster out of the hole but around 27-30mph top speed.