DF 16" hydro build
01-04-2010, 07:37 PM
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DF 16" hydro build
Building a delta force 16" hydro. This is my first brushless boat build. Have a few questions.
What should the offsets be for the drive line and rudder?
How to drill the hole for stuffing tube? 45 degree angle...etc...
Guess for CG of boat.
I'm sure I will have more questions. Props, etc....
Thanks
What should the offsets be for the drive line and rudder?
How to drill the hole for stuffing tube? 45 degree angle...etc...
Guess for CG of boat.
I'm sure I will have more questions. Props, etc....
Thanks
01-05-2010, 04:14 AM
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RE: DF 16
CofG is 33% of the hull length
mount the prop strut and rudder with double sided tape ready for drilling, i would guess to offset the motor 1cm off the datum (centre) line to counter act prop torque
you can drill the stuff tube hole however you like, i usually drill it so it lays flat inside the hull
what drive shaft are you going to use, straight or flex shaft
flex shaft you can have the stuff tube laying flat in the hull, straight shaft has to be inline with the motor shaft with some support under the stuff tube
mount the prop strut and rudder with double sided tape ready for drilling, i would guess to offset the motor 1cm off the datum (centre) line to counter act prop torque
you can drill the stuff tube hole however you like, i usually drill it so it lays flat inside the hull
what drive shaft are you going to use, straight or flex shaft
flex shaft you can have the stuff tube laying flat in the hull, straight shaft has to be inline with the motor shaft with some support under the stuff tube
01-05-2010, 10:53 AM
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RE: DF 16
then you could mount the stuffing tube on the hull bottom, epoxy it down in a few places, then if you have the room, mount the batt over it or the rx, servo and esc
01-05-2010, 12:35 PM
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RE: DF 16
ORIGINAL: nick 30
CofG is 33% of the hull length
mount the prop strut and rudder with double sided tape ready for drilling, i would guess to offset the motor 1cm off the datum (centre) line to counter act prop torque
you can drill the stuff tube hole however you like, i usually drill it so it lays flat inside the hull
what drive shaft are you going to use, straight or flex shaft
flex shaft you can have the stuff tube laying flat in the hull, straight shaft has to be inline with the motor shaft with some support under the stuff tube
CofG is 33% of the hull length
mount the prop strut and rudder with double sided tape ready for drilling, i would guess to offset the motor 1cm off the datum (centre) line to counter act prop torque
you can drill the stuff tube hole however you like, i usually drill it so it lays flat inside the hull
what drive shaft are you going to use, straight or flex shaft
flex shaft you can have the stuff tube laying flat in the hull, straight shaft has to be inline with the motor shaft with some support under the stuff tube
nick that's not right..
that is for mono and cat boats not hydros, and also 33% is a wet setting.. 28-30% is a faster setting for those boats
My SV27 is at 30% and my Cat is at 28%
the cog needs to be set from the turn fin, and on such a little boat about 1" back of the turn fin to start with, but I am not 100% sure of this size of boat..
01-05-2010, 01:00 PM
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RE: DF 16
cheers srt
no one had explained that to me, people have said 30%-33% is the norm, i did'nt realise it was different for hydro's, he says it's 16", my mini hydro is 16" and the battery is mounted at the front, motor behind that and prop shaft exit is half between transom and nose
no one had explained that to me, people have said 30%-33% is the norm, i did'nt realise it was different for hydro's, he says it's 16", my mini hydro is 16" and the battery is mounted at the front, motor behind that and prop shaft exit is half between transom and nose
01-05-2010, 01:06 PM
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RE: DF 16
just had a look at his hull and there's 2 differences between his boat and mine
his boat
- nose is shaped differently
- canopy different
my boat
- flat shaped nose
- canopy smaller (height wise and more stream lined)
my hydro has 27mhz rx
50a watercooled speedo
2064 B/L motor
50mm wedge rudder
1/8" flex cable
collet
30mm prop
11.1v 3000mah lipo
16", 18" (inc strut assembly) over all length
with my mini hydro, when you release the throttle, the nose digs in, i cant re-arrange everything as it was pre-built, i just needed batt and rx
he can start from scratch
his boat
- nose is shaped differently
- canopy different
my boat
- flat shaped nose
- canopy smaller (height wise and more stream lined)
my hydro has 27mhz rx
50a watercooled speedo
2064 B/L motor
50mm wedge rudder
1/8" flex cable
collet
30mm prop
11.1v 3000mah lipo
16", 18" (inc strut assembly) over all length
with my mini hydro, when you release the throttle, the nose digs in, i cant re-arrange everything as it was pre-built, i just needed batt and rx
he can start from scratch
01-05-2010, 01:21 PM
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RE: DF 16
ORIGINAL: nick 30
cheers srt
no one had explained that to me, people have said 30%-33% is the norm, i did'nt realise it was different for hydro's, he says it's 16'', my mini hydro is 16'' and the battery is mounted at the front, motor behind that and prop shaft exit is half between transom and nose
cheers srt
no one had explained that to me, people have said 30%-33% is the norm, i did'nt realise it was different for hydro's, he says it's 16'', my mini hydro is 16'' and the battery is mounted at the front, motor behind that and prop shaft exit is half between transom and nose
I've been doing this for a few years and I'm amazed by the guys who race near me.. their setups are amazing!
it helps to be around those who race and talk with the guys who win, and keep your mind open like I see you do on this site..
you'll run into trouble when you think you know it all like a few on this site do.. they will burn stuff up and spend more money than needed
cheers!
01-05-2010, 01:22 PM
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RE: DF 16
ORIGINAL: nick 30
just had a look at his hull and there's 2 differences between his boat and mine
his boat
- nose is shaped differently
- canopy different
my boat
- flat shaped nose
- canopy smaller (height wise and more stream lined)
my hydro has 27mhz rx
50a watercooled speedo
2064 B/L motor
50mm wedge rudder
1/8'' flex cable
collet
30mm prop
11.1v 3000mah lipo
16'', 18'' (inc strut assembly) over all length
with my mini hydro, when you release the throttle, the nose digs in, i cant re-arrange everything as it was pre-built, i just needed batt and rx
he can start from scratch
just had a look at his hull and there's 2 differences between his boat and mine
his boat
- nose is shaped differently
- canopy different
my boat
- flat shaped nose
- canopy smaller (height wise and more stream lined)
my hydro has 27mhz rx
50a watercooled speedo
2064 B/L motor
50mm wedge rudder
1/8'' flex cable
collet
30mm prop
11.1v 3000mah lipo
16'', 18'' (inc strut assembly) over all length
with my mini hydro, when you release the throttle, the nose digs in, i cant re-arrange everything as it was pre-built, i just needed batt and rx
he can start from scratch
01-05-2010, 01:45 PM
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RE: DF 16
some photo's of mini hydro
one thing it does'nt have is turn fins on the sponsons however it does corner well without them, i dont use it for racing but was thinking about putting them on both sides just for extra stability when turning
one thing it does'nt have is turn fins on the sponsons however it does corner well without them, i dont use it for racing but was thinking about putting them on both sides just for extra stability when turning
01-05-2010, 01:56 PM
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RE: DF 16
I've seen those in videos and they look like fun..
try a different lipo and watch that baby scream!
two turn fins will keep it from turning well, hydros are ment for left truns so one on the right would work great
try a different lipo and watch that baby scream!
two turn fins will keep it from turning well, hydros are ment for left truns so one on the right would work great
01-05-2010, 02:03 PM
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RE: DF 16
in other countrys its recomended to use 2s but over here its recomended 3s, i use the 3s, 3000mah, i have a mini mono, cat and another mini hydro winging its way from china, there all recomended 2s in other countrys, but i use 3s in all of them, they each have a battery
it does scream, its gone even on 1/4 throttle, i'm getting well into mini boats, i do have a 30" cat and a mono 1 class boat
it does scream, its gone even on 1/4 throttle, i'm getting well into mini boats, i do have a 30" cat and a mono 1 class boat
01-05-2010, 02:10 PM
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RE: DF 16
i thought 35C was good?? my other batts are turnigy batts
in mini mono and cat i'm upgrading the speedos to 50a so i got some space for the 3s lipos i use but first i need to get some hot melt glue sticks to waterproof them, there watercooled, clear heat shrink but just need waterproofing now
because i do left and right turns with it, would it be better to leave them off or stick with the one fin
in mini mono and cat i'm upgrading the speedos to 50a so i got some space for the 3s lipos i use but first i need to get some hot melt glue sticks to waterproof them, there watercooled, clear heat shrink but just need waterproofing now
because i do left and right turns with it, would it be better to leave them off or stick with the one fin
01-05-2010, 03:25 PM
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RE: DF 16
ORIGINAL: nick 30
i thought 35C was good?? my other batts are turnigy batts
in mini mono and cat i'm upgrading the speedos to 50a so i got some space for the 3s lipos i use but first i need to get some hot melt glue sticks to waterproof them, there watercooled, clear heat shrink but just need waterproofing now
because i do left and right turns with it, would it be better to leave them off or stick with the one fin
i thought 35C was good?? my other batts are turnigy batts
in mini mono and cat i'm upgrading the speedos to 50a so i got some space for the 3s lipos i use but first i need to get some hot melt glue sticks to waterproof them, there watercooled, clear heat shrink but just need waterproofing now
because i do left and right turns with it, would it be better to leave them off or stick with the one fin
Wow, I have the same batteries but they are a 10c rating...
35c is great!
left and right turns, if its work ok now I would leave them off.. If you do put one on then it will turn better one way than the other..
Like the UL-1 that is made for full speed right turns.. I can turn it left but at much lower speeds
01-05-2010, 03:51 PM
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RE: DF 16
ok, i'll leave them off then, i have a 4200 kv motor (3640) just wondering if it will handle 3s in a 25" hydro or will i need to get a 36** L motor instead, i ran it on a 3s batt for 2minutes and it just about started to get warm, if i use it, it will be watercooled with a full length jacket
01-05-2010, 04:33 PM
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RE: DF 16
ORIGINAL: nick 30
ok, i'll leave them off then, i have a 4200 kv motor (3640) just wondering if it will handle 3s in a 25'' hydro or will i need to get a 36** L motor instead, i ran it on a 3s batt for 2minutes and it just about started to get warm, if i use it, it will be watercooled with a full length jacket
ok, i'll leave them off then, i have a 4200 kv motor (3640) just wondering if it will handle 3s in a 25'' hydro or will i need to get a 36** L motor instead, i ran it on a 3s batt for 2minutes and it just about started to get warm, if i use it, it will be watercooled with a full length jacket
I would go 4s if you have the esc for it and a (3650-3660 size) 2000-2300kv motor
if not and 3s is your only option then choose something around 2700kv
01-06-2010, 02:26 PM
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RE: DF 16
Options?? Have some motors, batteries, and speed controllers laying around.
I have two brushless controllers. 1 - 40a and 1 - 60a
Two motors - ESky 3800kv outrunner and a Feigao 4515kv inrunner.
3c 1500mah 20C packs
3c 2200mah 25C packs
Is there a formula for what would work best for my boat. If I need to buy a new setup I will.
Sorry, new to electric boats.....have heli's, planes, and gas boat.
Thanks
I have two brushless controllers. 1 - 40a and 1 - 60a
Two motors - ESky 3800kv outrunner and a Feigao 4515kv inrunner.
3c 1500mah 20C packs
3c 2200mah 25C packs
Is there a formula for what would work best for my boat. If I need to buy a new setup I will.
Sorry, new to electric boats.....have heli's, planes, and gas boat.
Thanks
01-06-2010, 02:34 PM
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RE: DF 16
ORIGINAL: Tundrahog
Options?? Have some motors, batteries, and speed controllers laying around.
I have two brushless controllers. 1 - 40a and 1 - 60a
Two motors - ESky 3800kv outrunner and a Feigao 4515kv inrunner.
3c 1500mah 20C packs
3c 2200mah 25C packs
Is there a formula for what would work best for my boat. If I need to buy a new setup I will.
Sorry, new to electric boats.....have heli's, planes, and gas boat.
Thanks
Options?? Have some motors, batteries, and speed controllers laying around.
I have two brushless controllers. 1 - 40a and 1 - 60a
Two motors - ESky 3800kv outrunner and a Feigao 4515kv inrunner.
3c 1500mah 20C packs
3c 2200mah 25C packs
Is there a formula for what would work best for my boat. If I need to buy a new setup I will.
Sorry, new to electric boats.....have heli's, planes, and gas boat.
Thanks
01-06-2010, 02:41 PM
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RE: DF 16
My CG on hydros is from the sponson TE and not the turnfin. Usually and inch or so back but that depends. Start out an inch and then move back and to see when the boat loosens up.
01-06-2010, 02:57 PM
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RE: DF 16
in my mini mono and cat i have 2445 (2600kv) motors, 40a speedo, there is pics of my mini hydro on this thread and that use's 3s lipo, 50a (watercooled) speedo with a 2035 (2604kv) motor, all my setups are watercooled
the motors you have are to high but use the 60a speedo with either battery,
the motors you have are to high but use the 60a speedo with either battery,