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[explorer750]

Hi,
 I am planning to buy a dateline marine Renegade III and am pricing it up. However it says it is best run with a surface drive set up and I have only ran sub-surface before. Can someone suggest a suitable set up for this boat running a 700 motor? Also does a surface drive have to use a flex shaft?



Just some info of the site to help

This boat is the ultimate development of the very successful

As an electric powered boat with 12 plus cells a fantastic performance can be obtained using surface drive.

This boat can also be use with small IC engines (.12) and is suitable for the OMRA Z-class. It has also been run with under water drive with some success. The boat is 610mm (24inch) long and is made of fibreglass it comes joined with a separate hatch.

RENEGADE MK 3 610mm (24inch) F/E & Z CLASS 14 CELLS/IC

[omra85]

These have been run as submerged drive but mainly as surface drive.
They are a light boat as is necessary with a small engine. 
Surface drive will require a flexishaft but these are no more difficult to set up and run than a solid shaft.  The advantage of a flexi is that the drive pushes against the bottom of the transom, giving more forward thrust than a submerged shaft which uses part of its power to generate lift.  On flat water, you will not beat a flex for speed but if it's choppy, a submerged drive will give you more stability and a more even drive (the prop is in the water for more of the time).
Dave Marles sells small flexis and Dateline sell shafts
[urlhttp://www.datelinemarine.com/][/url]
Danny

[DickyD]

You do it like this Danny   

www.datelinemarine.com

[explorer750]

In the marine modelling review boat that was in the July 07 issue they ran it through a stringer. They said it gave a more scale appearance, does it also help performance or can I save the money and have a strut system? Also can someone suggest what size flex for the motor?

[omra85]

A STINGER will give you the same adjustment possibilities as a strut, but look neater.  The downside is that, unless you're very careful, you can induce forces into the flexishaft which can incur breakages.
I would go for a 5/16" flexi shaft which is sufficiently 'meaty' for a powerful motor, whilst giving you the easiest path in terms of hardware and props availability.
Danny

[explorer750]

I would go for a 5/16" flexi shaft which is sufficiently 'meaty' for a powerful motor,

Did you mean 3/16'' as I cannot find any thing that size only 1/4'' and 3/16''. Is this the sort of unit you meant.



Stinger/flexishaft assembly. CNC aluminium miniature stinger with precise adjustment complete with 3.6mm flexi with 3/16" stubshaft, drive dog, tube and Teflon liner.
PROPELLER IS NOT INCLUDED

[omra85]

Sorry, yes I did mean 3/16" (there's no such thing as a 5/16").
If you use a stinger, you will almost certainly have to have an offset rudder (or a very long rudder support arm).
I still prefer the normal strut.
Dave Marles does a smart looking one that seems to be a cross between the two.

Danny

[BJ]

Sorry for late reply but been out of the country for a while.
These pictures were passed on to me by an F.E. guy and it works in my boat.