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Old Mar 20, 2009, 07:52 PM
life is a beach
fvasileios's Avatar
thessaloniki-greece
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Build Log
sunseeker predator 108

hi there guys....

i'm back with my new project...once revell produced this model i felt like i have to rc it cause i love this type of boats....it's a very beautiful model in my opinion with many pretty scale details...i placed two simple motors which you'll see in photos and i'm about to finish the construction....then i have to order and place the electronics in the hull and it's ready.a few pieces left to be stuck on the model and some painting corrections.i also place two bulbs that lights the cockpit and all the living room.i'm planning to use a 4ch receiver,an esc and the power for the motors will be 9.6 volts.any suggestions accepted specially for how to light up the bulbs from the transmitter.sorry for posting close to the end of this project but there was no time because of work...i really want to listen to your opinion cause it's my second rc model after QM2.....


bill
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Old Mar 20, 2009, 09:55 PM
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Joined Dec 2002
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Interesting rudder position.
How does the actual boat steer?
I am guessing that you have the correct position for the
surface drive propellers...

How is the model for displacement?
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Old Mar 21, 2009, 09:21 AM
life is a beach
fvasileios's Avatar
thessaloniki-greece
Joined Sep 2008
537 Posts
Quote:
Originally Posted by Umi_Ryuzuki
Interesting rudder position.
How does the actual boat steer?
I am guessing that you have the correct position for the
surface drive propellers...

How is the model for displacement?

hi there Umi...well i want to install the servo and see if the rudder will work cause i made it by myself...in the model characteristics it says that it has 3 drive pods.i don't know if this explains how the actual boat steers cause in the actual boat there is no rudder...

what do you mean when you say "I am guessing that you have the correct position for the surface drive propellers..." and "How is the model for displacement? "... ?
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Old Mar 21, 2009, 12:59 PM
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Joined Dec 2002
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Quote:
Originally Posted by fvasileios

what do you mean when you say "I am guessing that you have the correct position for the surface drive propellers..." and "How is the model for displacement? "... ?
My investigations say that the boat has three six bladed surfaces drives.
This would place all three propellers high on the transom with
only half of the propellers in the water. So the position where
you placed your props looks correct, but I am wondering if
the actual boat used steerable drives, or if there was a rudder.


Displacment, is how much water does the model displace, or
how deep it sits in the water.
Does the model sit well, or is the displacement low compared to the waterline?
When you put all the equipment into the model, is it heavy?
Or is the model light, and you have extra displacement to put
more batteries or weight into the model?
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Old Mar 22, 2009, 08:32 AM
life is a beach
fvasileios's Avatar
thessaloniki-greece
Joined Sep 2008
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Quote:
Originally Posted by Umi_Ryuzuki
My investigations say that the boat has three six bladed surfaces drives.
This would place all three propellers high on the transom with
only half of the propellers in the water. So the position where
you placed your props looks correct, but I am wondering if
the actual boat used steerable drives, or if there was a rudder.


Displacment, is how much water does the model displace, or
how deep it sits in the water.
Does the model sit well, or is the displacement low compared to the waterline?
When you put all the equipment into the model, is it heavy?
Or is the model light, and you have extra displacement to put
more batteries or weight into the model?


hello Umi....
i found this on a website:
STEERING: Hydraulic
PROPULSION: Direct gear drive through triple Arneson surface drives.
also this:
Propulsion: Direct gear drive through triple Arneson surface drives, or submerged twin props in semi-tunnels

also there is a photo from my model's instruction book...


well about displacement when i fload tested it i had bateries and motors inside and it seemed that it could carry some more weight...now i'll know once i'll buy all the electronics...i think it will be ok...
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Last edited by fvasileios; Mar 22, 2009 at 09:47 AM.
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Old Mar 22, 2009, 09:17 AM
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Bavaria, about 45km from Neuschwanstein-Castle
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Hi Bill,

looks very good yet. But the props are too big. We have ordered the smallest props from Propshop, UK. They will be 15mm diameter, but you can't get them as surface-cleavers.
In our german forum we did find out, that you have 70 gram only to put it into the hull to get the correct cwl.
Some of us are doing the tunneled hull, some the arneson's.
I was thinking about using a coax-helicopter-radio. There you have 2 esc's (one direction only) for two props, and 1 servo for steering. Another method will be, to control both motors similar to Tamiya TamTech cars. That means, you can use your servo-motors for the props and the servo-electronics for controlling forward/back driving. So you don't need a rudder. Maybe a third motor as booster. Then driving the small hull with lipo 2s350mA or 500mA, or 2 Konion cells.

Best Regards,
Ernst
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Old Mar 22, 2009, 09:46 AM
life is a beach
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Joined Sep 2008
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Quote:
Originally Posted by FatBeech
Hi Bill,

looks very good yet. But the props are too big. We have ordered the smallest props from Propshop, UK. They will be 15mm diameter, but you can't get them as surface-cleavers.
In our german forum we did find out, that you have 70 gram only to put it into the hull to get the correct cwl.
Some of us are doing the tunneled hull, some the arneson's.
I was thinking about using a coax-helicopter-radio. There you have 2 esc's (one direction only) for two props, and 1 servo for steering. Another method will be, to control both motors similar to Tamiya TamTech cars. That means, you can use your servo-motors for the props and the servo-electronics for controlling forward/back driving. So you don't need a rudder. Maybe a third motor as booster. Then driving the small hull with lipo 2s350mA or 500mA, or 2 Konion cells.

Best Regards,
Ernst

hi there Ernst...
i ripped out the motors with the shafts and props from a cheap boat toy...i'm not really looking for scale stuff under the waterline.i only want to see my baby working...besides i'm looking for cheap ways to make this happen...i'm not yet in a position where i can spend much money for my hobby and i'm not also so experienced like most of you are...i hope that in future i will learn from you and i'll be able to do better projects...now you made me worried by saying this for 70 grams only...in the fload test i had the motors you see in picture and the 8 pack 9.6 volts battery...i think it looked ok....maybe i have to try again...


bill
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Old Mar 22, 2009, 10:20 AM
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Ernst can you check this please?it might be some you'll need...from what you and guys in german forum trying to do this might be helpful.....

http://www.action-electronics.co.uk/...k/pdfs/P94.pdf

bill
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Old Mar 22, 2009, 01:41 PM
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Bill,

Thanks for the picture of your instruction sheet.
That's the only image I have seen that shows how the
drives are located on that boat.

Fatbeech,

Any pics of the semi tunnel mods to the hull?
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Old Mar 22, 2009, 06:18 PM
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Bavaria, about 45km from Neuschwanstein-Castle
Joined Nov 2006
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Hello Umi,

here are some pics from the german thread...

http://www.rc-modellbau-schiffe.de/w...?threadid=6334

You have to register in the forum first, to be able, to see the pics. If you need a translation, I will help.

In this forum my nick is "promocean".

Best Regards,
Ernst
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Old Mar 22, 2009, 06:29 PM
life is a beach
fvasileios's Avatar
thessaloniki-greece
Joined Sep 2008
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Quote:
Originally Posted by FatBeech
Hello Umi,

here are some pics from the german thread...

http://www.rc-modellbau-schiffe.de/w...?threadid=6334

You have to register in the forum first, to be able, to see the pics. If you need a translation, I will help.

In this forum my nick is "promocean".

Best Regards,
Ernst

hi Ernst,
i think it would be easier if you could upload these pictures here ...i can't understand a word...but from the pictures already in this thread it seems a pretty nice work...why this shape in the hull where the rudders took place?

bill
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Old Mar 22, 2009, 08:08 PM
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Joined Dec 2002
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Ernst

Good images there.
Seems like they have some issues with placing the tunnels first, then
trying to line up the motor and shafts.... But the images are very informative.

Aimee
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Old Mar 23, 2009, 02:05 PM
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Bavaria, about 45km from Neuschwanstein-Castle
Joined Nov 2006
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My friend Olaf, known in our german forum as "The Bastelritter" (that means someone like a model building knight, who always does his thing), has a homepage on which you can read the story in english language:

http://www.bastelritter.de/index.php...d=23&Itemid=94

If now are more questions, please ask and I will translate or explain (cause Olaf uses a translating program).

Best Regards,
Ernst
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Old Mar 23, 2009, 06:29 PM
life is a beach
fvasileios's Avatar
thessaloniki-greece
Joined Sep 2008
537 Posts
Quote:
Originally Posted by FatBeech
My friend Olaf, known in our german forum as "The Bastelritter" (that means someone like a model building knight, who always does his thing), has a homepage on which you can read the story in english language:

http://www.bastelritter.de/index.php...d=23&Itemid=94

If now are more questions, please ask and I will translate or explain (cause Olaf uses a translating program).

Best Regards,
Ernst
Thanks a lot Ernst...
quite interesting website...olaf seems like an experienced modeller...i'm worrying about the weight in mine...i haven't taken anything out to gain weight and i'm going for 9.6v 8pack battery...should i worry???i think i'll have to test it...have you shown olaf mine?opinions from you and other experienced modellers is what counts....

efcharisto,bill
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Old Mar 23, 2009, 08:19 PM
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Bavaria, about 45km from Neuschwanstein-Castle
Joined Nov 2006
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Hi Bill,

did you ever test the hull with needed additional weight in a bathtube before building together?

Ernst
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