STEALTH SPORT HYDRO Nitro to FE

[detox]

Phil, I am thinking your COG may be too far forward, but you can allways add weight to the stern to correct. Two 2s Grimracer (Deans installed from factory) packs would make boat lots faster.

M445 is a good starter prop. More advanced racers bend their own props to get max out of P spec. I wish I knew how.

[phil t]

Phil, I am thinking your COG may be too far forward, but you can allways add weight to the stern to correct. Two 2s Grimracer (Deans installed from factory) packs would make boat lots faster.

M445 is a good starter prop. .

Well we will see how it goes it would be nice to have it nose heavy can always move things back.
This is not like a whip. How long is that mod whip you are building?
Sport boats usually work with a balance point about 88-90% of the afterplane lenght. Depending on hull lift, weight and sponson angle of attack.
Yes I think the Grim racer lipo packs will do fine too.

[Brushless55]

Hi Jim, you know I really want a fast 36 inch sport boat. Maybe there has to be a new Stealth 36" next year.

[Jesse J]

Well, just the man I have been thinking of. I picked up one of these babies and had her painted up. I am amazed at the handling on LSH power - even in 15mph winds today! I have good luck with the motor just behind the packs and with my gps on top of the batts, she was great!

http://www.youtube.com/watch?v=N5EmhU8nt7A&feature=youtube_gdata_player

So great that I am working on scaling up the hull to 34". it's a lot of measuring, excel spreadsheet with scaling factor of 113%. Are you planning on a P Hydro FE hull? If so, when would it be available? If not, I hope to have one ready in the next few months.
What changes would you recommend in the slightly larger version? I was not planning to change a thing.

[Darin Jordan]

Hey guys... Does anyone happen to have the measurements on the Stealth of the distance between the "front sponson planing surfaces" (Inside edge of the ride-pads) and the width of the bottom of the transom??

Thanks,

[RCKong]

Darin - 11 1/8" between the ride pads
8 3/4" at the transom, 16 1/2" behind the sponsons

[Darin Jordan]

Darin - 11 1/8" between the ride pads
8 3/4" at the transom, 16 1/2" behind the sponsons

Is it 8.75 at the BOTTOM of the transom??? Or is that total transom width??

[RCKong]

8" at the top and 6 3/4" at the bottom of the transom. I misread the 6 fo an 8

[Darin Jordan]

8" at the top and 6 3/4" at the bottom of the transom. I misread the 6 fo an 8

I see...

You guys DO realize that this hull, then, does NOT meet the 65% Transom width requirement in the NAMBA Sport Hydro rules?? 6.75"/11.125" = 60.7%. It needs to have an additional 1/2" (0.48125" ) added to the width at the bottom of the transom.

NAMBA Rules, Section 28, Page 9... 28.E.1.c.vii):

The width of the transom bottom shall be no less than 65% of the width between the inside edges of the front sponson planing surfaces. An exception to this will apply to the scratch build scale designs of full sized boats that are full bodied 3 points hydroplanes but have an afterplane that tapers sharply at the transom. Example: Lauterbach shovelnoses.

I have one on the way and will see if I can figure out what needs to be done to make it NAMBA FE Sport Hydro legal... Likely just add some material to the transom.

[Darin Jordan]

NAMBA Rules, Section 28, Page 9... 28.E.1.c.vii):

The width of the transom bottom shall be no less than 65% of the width between the inside edges of the front sponson planing surfaces. An exception to this will apply to the scratch build scale designs of full sized boats that are full bodied 3 points hydroplanes but have an afterplane that tapers sharply at the transom. Example: Lauterbach shovelnoses.

By the way... for the record... I think this is a STUPID rule, and that, at a minimum, the FE Sport Hydro rules and the Nitro Sport Hydro rules should be one in the same. The only exceptions should be where necessary to allow for the FE vs. Nitro power system setups. There should NOT be differences in dimensional requirements, etc... Not in the basic rules, anyhow... SILLY!!

[bozo586]

thanks darin-you have made lots of friends today! i just spent three months building one of these boats and we all know there's lots more being built and being run around the country! do you actually think we are going to change them after all the work we put in-i won't and i also won't stay up all night looking for rules that cause problems for other people in this hobby,sport or what ever racers call it. i was ready for a great racing season-but i'm done now to much b/s about rules and now i understand why r/c won't grow! just my two cents that nobody cares about-because i'm a fossil.

[Darin Jordan]

thanks darin-you have made lots of friends today! i just spent three months building one of these boats and we all know there's lots more being built and being run around the country! do you actually think we are going to change them after all the work we put in-i won't and i also won't stay up all night looking for rules that cause problems for other people in this hobby,sport or what ever racers call it. i was ready for a great racing season-but i'm done now to much b/s about rules and now i understand why r/c won't grow! just my two cents that nobody cares about-because i'm a fossil.

Hey, Dude... I didn't make the rules... I just try to follow them! Don't drop your BS attitude on me! I didn't design the boat...

As I stated above, I'm about to build one as well. I, however, do my research prior to embarking on a project, because I want to be 100% legal. Sorry if I'm observent!

As I also stated above, I, too, think it's a STUPID rule. I thought it when they drafted it, and I still feel that way today. However, the fix is likely simple, and I will be happy to do a write-up once I have a boat here (next week) to work on. If you spent 3-months building it, I fail to see how spending another hour or two to make it fit the class is going to be that big of a deal.

Phil is a Nitro guy, and I think may be in the IMPBA. He may not have known about the transom rule. Either way, it's going to be a great boat that simply needs a little tweak to fit the class rules. Big deal...

[raptor347]

thanks darin-you have made lots of friends today! i just spent three months building one of these boats and we all know there's lots more being built and being run around the country! do you actually think we are going to change them after all the work we put in-i won't and i also won't stay up all night looking for rules that cause problems for other people in this hobby,sport or what ever racers call it. i was ready for a great racing season-but i'm done now to much b/s about rules and now i understand why r/c won't grow! just my two cents that nobody cares about-because i'm a fossil.

I guess Darin and I are in this one together (everything is pretty much our fault anyway). We figured it out while measuring one of the 3 I have in the shop. No big deal, fix it, make it legal and race it like it's stolen. I wouldn't bother if I didn't think it was going to be a great boat.

I always find it interesting that people get pissed because of their own ignorance. It's ultimately the racers responsibility to make sure they conform to the rules they are racing under.

There was a whole bunch of bondo work going on to the bottom of about half the gas crackerbox field at the NAMBA nats last year because the racers assumed that hulls they were buying conformed to the rules and never checked them.

For the record, I didn't like the rule when it was written and I still don't. It's one of the main reasons I haven't bothered building any new designs for FE Sport Hydro.

In the mean time, anyone bringing one to the FE nats this summer has plenty of time to get it modded to make it legal.

[Darin Jordan]

darin-my name is john gross not bude. no b/s intended maybe i'll buy a proboat do they have a legal hull.

John, Nice to meet you!

Unfortunately, I haven't been able to talk Pro Boat into developing a decent racing capable Sport Hydro yet... But, you never know!

Stick with the Stealth. Fixing it is simply a matter of adding 1/4" or so to the sides of the bottom of the transom. I'm sure others may have additional ideas.

I'm pumped to get mine and get it on the water.

[detox]

You can add material to inside riding surfaces of sponsons. Inside riding surface of stealth is alot like the Whiplash.