Project FighterSplat- 24.5" Stepped Mono

[FighterCat57]

TFL Hobbies 24.5" Stepped Mono (Ariane, NightHawk) hull.

I'm calling it the "FighterSplat".
Rather than sell it, I'm going to build it. Then decide if I want to build/sell more.

70mm Stinger
95mm Break Away Rudder w/Water Pickup
2 Bolt Water Cooled Motor Mount

3126 1500w Outrunner

Maybe .062 wire drive or .150 cable.


I've got an Eagle Tree now w/GPS, so this should be a good setup tester.

What I don't know about is turn fins. How big? What shape? Why?

[carlcisneros]

Ben;
Try it without the turn fins first and see how it goes.

Carl

[LarrysDrifter]

My friend and I run our monos without turn fins.They seem to make them turn too sharp on top of an already good turning hull.

[FighterCat57]

Cool. Figure if the rudder is big enough for a 32" hull, it should turn this little guy on a dime.

[Make-a-Wake]

Nice!..............3s..........4s?

[FighterCat57]

Nice!..............3s..........4s?

4s 2200kv

[LarrysDrifter]

That thing will fly with that combo!

[blackcat26]

Still can't believe nobody bought this in the swap shop! Such a good deal bro! (was)

[FighterCat57]

Still can't believe nobody bought this in the swap shop! Such a good deal bro! (was)

Guess it has to be "proven" first.

some updates coming tonight. Paint is drying.

[Rumdog]

looks like it could be set up as an eco too.

[FighterCat57]

Heh... SPLAT.

Fixed the wrinkles and the warped hatch. Nothing like a little heat, pressure and time.

Blinged out the motor mount while I at it.

[FighterCat57]

Added some hardware... using the new vinyl drill template decals... NICE. =)

[NativePaul]

Darn thought I did a post on this already, but my damed interweb is all over the place and must have gone down as I was sending it.

I have not run one of these but I have seen one in the flesh and its bottom looks VERY much like the ETTI Chaser, not identical/splashed but either the same designer or someone was peeking over his shoulder when he drew it, out of interest do you know whether the same factory is making both?

It is a mono1 hull which are normally run with 2s 5-6000mAh (sub 280g), 480 size motor 4200-4900KV, .130 flex, 33-37mm prop.

I see you are using 4s 2200kv I would use cells well under the 5000mAh, around 3Ah should keep the weight reasonable. no point in using a huge motor either if you decide to go 36mm rather than 28mm make sure its well under 200g you cant swing huge props on these boats, anything over 40mm will make it handle like crap, if you want more speed you pretty much have to do it with volts or KV.

It will need a turn fin. I guess Larry and his buddy are using unstepped monos, I've seen a few stepped monos without turn fins at races over the years, but none they all had one at the next race. Stepped monos are fast on small amounts of power and they get their speed from having little hull in the water, but you need something in the water for the rudder to work against or you just get yaw and no turning. The common Chinese 66-70mm teardrop shape as found in the OSE shop in either alloy or carbon is the most popular, mount it close to the bottom and start with it tilted back so there isn't much in the water below the chine, then angle it down until you are happy with the handling if you have to run it so deep that it drops bellow the keel then you need a new wider one, it should be out of the water down the straights.

I don't think its big enough for a 32" hull, but the 95mm rudder should be enough for this boat most Mono1s run either 95 or 100mm.

You could set it up as an ECO but it would be useless due to its narrowness, low deadrise up front and lack of steering strakes, also it would be illegal due to the step.

[FighterCat57]

Darn thought I did a post on this already, but my damed interweb is all over the place and must have gone down as I was sending it.

I have not run one of these but I have seen one in the flesh and its bottom looks VERY much like the ETTI Chaser, not identical/splashed but either the same designer or someone was peeking over his shoulder when he drew it, out of interest do you know whether the same factory is making both?

It is a mono1 hull which are normally run with 2s 5-6000mAh (sub 280g), 480 size motor 4200-4900KV, .130 flex, 33-37mm prop.

I see you are using 4s 2200kv I would use cells well under the 5000mAh, around 3Ah should keep the weight reasonable. no point in using a huge motor either if you decide to go 36mm rather than 28mm make sure its well under 200g you cant swing huge props on these boats, anything over 40mm will make it handle like crap, if you want more speed you pretty much have to do it with volts or KV.

It will need a turn fin. I guess Larry and his buddy are using unstepped monos, I've seen a few stepped monos without turn fins at races over the years, but none they all had one at the next race. Stepped monos are fast on small amounts of power and they get their speed from having little hull in the water, but you need something in the water for the rudder to work against or you just get yaw and no turning. The common Chinese 66-70mm teardrop shape as found in the OSE shop in either alloy or carbon is the most popular, mount it close to the bottom and start with it tilted back so there isn't much in the water below the chine, then angle it down until you are happy with the handling if you have to run it so deep that it drops bellow the keel then you need a new wider one, it should be out of the water down the straights.

I don't think its big enough for a 32" hull, but the 95mm rudder should be enough for this boat most Mono1s run either 95 or 100mm.

You could set it up as an ECO but it would be useless due to its narrowness, low deadrise up front and lack of steering strakes, also it would be illegal due to the step.

Hi Paul, Thanks for the setup information!
Refreshing to hear real world knowledge.

It quite possibly could be the same MFR or more likely a likeness by a newer startup factory.

It's setup with Motor & Batts = 390 grams (2650mah 30c & 3126 outrunner)

This is a second build, the first one does great on a K40 and was considering using a 932 or 935 for curiosity's sake. The problem with the first is I used a mini rudder and it doesn't turn well.

I have some turn fins that arrived today, before mounting I'll post up and see if I get them right. I don't have much experience setting up mono's, so any and all information is appreciated.

PS, I found the 25" Prince and it is way different; http://forums.offshoreelectrics.com/...d=1#post259246

[questtek]

Ben,

The pics below show a carbon fiber turn fin on the NightHawk. It should give you an idea of placement. This boat was supposed to be self righting but I flipped it more than a dozen times and IT HAS NEVER SELF RIGHTED............Not even close to it!

I think it has potential so I built a new type of motor mount that attaches to a base plate with four stainless nuts. This permits motor changes in a minute or so and does not require any type of fancy allan wrench maneuvers. I will try the Turnigy 1600KV, 1500 watt motors you recommended on 6 s to see what it will do.

Nice enough boat but really does not compare in my opinion to the DF sniper. Again, just my opinion after running both of these boats for over a month now.