102 mph mono subs and smokes!

[Punisher 67]

They are for sure splitting the load between the two ESC's , A LMT 3080/5 can easily draw into the 400+ amp range under hard load................


Thanks Mark , maybe I don't have to buy a Schulze 40/303 for my 3080 Sniper . I just might go that direction now

[m4a1usr]

Thanks Mark , maybe I don't have to buy a Schulze 40/303 for my 3080 Sniper . I just might go that direction now

Just so you are aware there are a couple down sides to doing 2 speedos on one motor. The biggest is if the load is that great where you need to divide the amperage and your close to the edge, one speedo can thermal and leave 100% loading on the one stronger or more eff speedo. No two speedos are perfect matches. Each one is built ever so slightly different compared to the other. Each on a given load will have some inefficiencies when compared against each other. How much? Thats the 64 dollar question. But the fact is they will be slightly off. Thats production manufacturing. Might be .001%, might be 1%.

This has been attained several times before over the years. These guys didnt originate this idea. But they are making it work. And it can work. But its subject to the dynamics of each system and the more complex it becomes, the more subject to catastrophic failures. No pooping on this achievement. Just stating that with complexity comes issues.

John

[Doug Smock]

And then there is timing.
I think the issues were similar when those guys tried coupling two X two motors together in a cat with 4 ESCs. Everything has to be perfect, the odds are stacked against you.
It does make for some spectacular failures though.
Doug

[Punisher 67]

I really do appreciate you guys watching my back on this quest for knowledge John and Doug . The down sides are well noted .

I may go this route or seeing new insite just splurge and buy the 40/303 as originally planned . I am in no way shooting for any records I just love terrorizing the local nitro club .........

[RaceMechaniX]

Peter,

You need to get the 40.303wk once you are on the limit of your 40.160 will deliver. Plus I know a great machinist who makes a 3080/40.303 mount

I am sure the reasoning behind the twin 40.160 is to handle the current. I will also testify that a 3080/5 will pull more than 425A under load. They are monsters!

A single 40.300 or similar is a much better approach than twin 40.160's for the reasons mentioned above.

TG

[Insaniac]

Here are two more vids of the same run.
I think just jumps and it doesn't sub, you can see the hull before it hits the water. That thing is fast!!
The second one shows some of the aftermath!

http://www.youtube.com/watch?v=bV-QTzbZfyY&feature=related

http://www.youtube.com/watch?v=EEcLU0Ik0tw&feature=watch_response

There are two speed controllers and one outdrive!
They copied me!

Video is complete with a butt-crack toward the end! Nice...

[ManuelW]

Hello,

well as everybody is curious, as far as I know this is not a stock LMT 3080 engine so wouldn't recommend to try this at home, especially using two 40.160 Schulze of the old series (better idea: sell these to me!!)

I'm sorry but thats all what I'd like to say about the "power plant" in this mono here officially on the forum.

BTW guys: In a HPR 135 (twin setup) an LMT 3040/09 on 8S produces peak amps of measured 415A. I'd assume an LMT 3080/5 with the right number of cells is more like 1000A (short circuit) than the guessed 400A.

Best regards,
Manuel

[Doug Smock]

I'm not sure exactly what the deal was but I saw a 5 turn destroy a 40.300 in Valdosta a few years ago. T Hydro if memory serves.

Thanks Manuel

Doug
"(better idea: sell these to me!!)" LOL Mine are going to be buried with me .

[Gary]

I enjoyed watching both. I know about the inaccuracies with GPS speed racing, but its fits the sport boaters just fine. I wouldn't mind participating in a sanctioned SAW event for the fun of it and to compare the differences in speed between GPS and radar gun or whatever they use. I apologize to Chris and the thread as a whole for snapping back.

Dont apologize for doing what you love to do Larry. If a GPS is all you have like me and alot of other people and your having fun, who cares. All these boats are cool and its the chase for speed that is fun and keeps this hobby going. Its all good!!!!

[Jacked1]

Dont apologize for doing what you love to do Larry. If a GPS is all you have like me and alot of other people and your having fun, who cares. All these boats are cool and its the chase for speed thats is fun and keeps this hobby going. Its all good!!!!

[KTM_EXC]

Photos

Hi everybody
just of couple of photos taken at Swiss SAW on Sept. 2010.
Cheers
Andrea

[Doug Smock]

Wow....... Thanks for posting.

[Rumdog]

WOW is right!

[KTM_EXC]

A few years ago I beleive Lehner made some custom motors for himself to run at the German SAW that were like two motors in one and had six leads that came out and ran two ESC's. This may be something like that.

Chris

That is exactly what I have listened at Swiss SAW last year.

About speed, this is the link with the classification of SWISS SAW 2010
Ralph Moser - the owner of the "burned" mono is n° 5;

http://www.git-ticino.ch/sawghirla/ghirla2010.html It's in Italian but Km/h is universal.

The speeds listed are REAL !! These are measured by a team of offical timekeepers using speed traps

But in my opinion the very very impressive boats are n° 3 (Hydro 2 cells) with 167 km/h and n° 10 (Hydro 1 cell) with 130 km/h of top speed

[KTM_EXC]

Last but not least the most beautiful and original boat was in my opinion this "GLIDER"

BTW: it was n° 4 in the classification (159 km/h)