Excellent Read

[SJFE]

I have offen wondered if my facination with twin drives & power systems is just that & not a preference. I am quite bord out of my mind today so I went forum surfing for some knoledge. I ran across this thread on RRR. It's well worth the read. Thank's to the guys who contributed to this.

Single Vs Twin drive's.

[Eodman]

Interesting read ---- now what happens when you drive the Cat with 2 8xls, 2 hydra 120's & each with its own power supply of a 4S1P????

[SJFE]

Go over it again. Andrew and Jay T covered everything.

[robby76]

SJFE, thanks for that link. qouting JayT
"Twins are cool, sound awesome, can eliminate prop walk and just seem to belong on scale boats. Singles are for pure performance - and lower cost and ease of building."

that is so true!
now, everyone has there own choice to make, and yes $$$money$$$ plays a factor.
i chose to build my 42 inch cat "sea terror" with twins. it has two Fiegao 10XLs on transmissions geared 1:2 to 1, on 16 cell 3300mah cells, two hextronic 120EScs, HD servo, octuras new X450/3 L&R, with the highest speed recorded at 51.4 mph on garmin gps pulling 73 amps. it handles great.
the main point i want to make here, is the affordability of this economy twin drive. it is for sport only and i usually run it for 4 minutes. temps are motors under 100', cells 125', escs 140'.
it is fun.
racing NAMBA/IMPBA...been there done that. have my trophies nothing to proof.

[Doug Smock]

All the racers I know do it for fun, their not out to "proof" anything. LOL
Which IMPBA club did you race with?

Doug

[robby76]

All the racers I know do it for fun, their not out to "proof" anything. LOL
Which IMPBA club did you race with?

Doug

IMPBA affilate i associated with i can't remember cause i was not a member but they did honor NAMBA. was in district that covered TX,OK,MO,LA...lots of great folks. some are still racing and still put out there line brand hulls & hardware.
and yes...it was alot of FUN

[ace028]

what about twin motors, single prop? Or did I miss that in the other thread?

[SJFE]

It would apply if the equipment to run that setup up where conmen. At this point there are 3 gear boxes like that available. The graupner unit is very light duty. The second one I know of is for scale boats & the third MHZ unit is mainly for gas & nitro, very heavy & really expensive. When a gearing system comes along for FE & don't cost to much then it can be seriously considered.

[ace028]

How about the Hughey drives from Fullers? For some reason I thought they were cheaper then 60 bucks.

[SJFE]

I mistook what you referred to. I thought you meant a single motor to dual drives. IMO dual motor drive to a single prop is or was a crutch for less powerful brushed motors. It allowed a set of motors to turn a large prop. Modern brushless motors have made them obsolete.

[sjslhill]

I mistook what you referred to. I thought you meant a single motor to dual drives. IMO dual motor drive to a single prop is or was a crutch for less powerful brushed motors. It allowed a set of motors to turn a large prop. Modern brushless motors have made them obsolete.

You could change the gear ratios and do lots of things in those days. BL could only turn tiny props and the motors and controllers often failed. Of course some sponsored NAMBA people that ran BL for free, made statements that BL was perfect and one motor was all you needed for 5 boats. The people that made these statements had a tackle box full of them.

It was just an evolution of the hobby.....not a crutch. Just like Offy once ruled Indy. I guess I am old, I was there in those days. Before the Wollards came along and instantly knew everything and threw around lawsuit threats to everyone that farted.

[SJFE]

. I knew this post would catch your attention Mr Hill . Do you happen to have a link to that "one motor" I can use in all 3 of my boats?. You know if there where mulit motor to single drive gearing setups that could withstand 30 to 40,000 rpm's & gobs of torque they would be very interesting to play with on BIG hulls. Like a pair of KB45XL's in a Delta 45 turing a 60mm prop.

[sjslhill]

Back in those days we did not even use the Internet Tom, I have no link. The Octura props were designed to work best at 20K to 25K Rpms and that is what Ed worked on.

[SJFE]

I wasent lookin for one man I was being silly . Speaking of props.... The advent of these CNC props is a big step in the right direction for high rpm applications. Hopefully I'll be able to afford a few of them.

[sjslhill]

Are these CNC props copies of Octura?