Delta force mini sniper 23 build for newbie

[eehess81]

Hello all. New to the forum and boat building. Have only done some upgrading of inexpensive RTRs so far.
I'm going to be getting the hull for the DF23 soon and need some advice.
I think I'm good on the external hardware installation and electronics but need help with the electronics internal mounting and hatch water sealing.
What is the best way to mount the motor and servo? Do I epoxy wood/plastic/alluminum mounting plates down or do I need to make stringer rails?
How do I make it water tight with the hatch?
The boats I have run have been app. 18 inch self righting boats with outrunner motors. Will a 23 inch boat with an outrunner be self righting? I'm gonna start with a 4000kv outrunner on 2s lipo.
will probably switch to 3200-3500 kv on 3s once I dial everything in. Any help would be appreciated.

[eehess81]

I think I'm gonna make wood/fiberglass stringer rails with a platform in front of motor and over stuffing tube for esc and servo. Do I need to do a flood chamber for a 23 inch boat or will the torque of the outrunner be enough to flip it upright?

[ray schrauwen]

The boat doesn't need stringers since it's so small and built very robust. I've built several (still building one now) and I just use a motor mount from OSE. I make an aluminum servo mount out of 1/16" thick 3/4" x 12" angle aluminum and I make a wood wedge platform for it.

I run 28mm x 60mm leopard motor, 2550kv on 4S.

I don't bother with self righting and if you want that you will need to experiment with it. Th boat will not self right without a flood chamber afaik.

[eehess81]

Without self righting what do you do if it flips? Go for a swim? Hehe. Is that motor an inrunner or outrunner? What speed you get out of it? If you could show me some pics that would be really helpful. Thanks for the reply!

[ray schrauwen]

I never did flip it and I sold them. I won't sell this one though. The motor is an inrunner but the boat was originally designed with an outrunner in ARTR form, forget the KV??

Need to sleep, more tomorrow...

[Panchothedog]

Don't ever go swimming to retrieve a capsized toy boat. A spinning reel with
A tennis ball at the end works real good. Tape the seams of the hatch prior to running with electrical tape and you boat will stay dry on the inside, inside down or not. Don't forget to add flotation.

[Panchothedog]

Upside down or not. Dam tablet thinks it knows what I want to say.

[eehess81]

What do you mean by add flotation? The fishing pole and tennis ball is a great idea. I had to borrow a person's boat to retrieve my boat when the driveshaft fell out last month. They weren't home but I'm sure they wouldn't have minded...
Do most people run bigger boats without some kind of self righting mechanism?
I have a 2860 2800kv outrunner that might have enough torque to flip a 23 inch boat but will have to try it out.

[Panchothedog]

For flotation some people use pieces of pool noodle ( a kids pool toy ). I
like to use pieces of construction grade Styrofoam. It can be cut and shaped
to fit the hull and then epoxied into place. The idea is to keep the boat from sinking even if it completely fills with water. If it sits upside down
long enough this can happen and you don't want your boat, =$$$ going to
the bottom. Self righting is from a chamber on one side of the hull that fills
with water and the weight causes the boat to sorta roll back over. It seems like it would almost need to be manufactured into the hull and I don't know how you can add this after the fact. I have been in the hobby of electric boats since 1987, have owned 25 to 30 different boats over the years and have never had a self righting boat. I don't think I would worry about it too much of I were you. As far as torque flipping the boat, too large of a prop for the hull is probably more dangerous than too large of a motor.

[eehess81]

Oh ok, that makes sense. What size prop you think would be good for 23 inch boat. Gonna use outrunner motors so I will have more torque. Was gonna go with 34-35mm.

[Panchothedog]

That is certainly in the ballpark for that size hull.

[eehess81]

Do I need to do some kind of inlay inside the hull before mounting all the electronics? Does it add rigidity or just protect the boat?

[ray schrauwen]

No.It's such a small hull and laid up so well it doesn't need it. a simple motor mount will add lots of strength and rigidity

[ray schrauwen]

pics

[ray schrauwen]

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