Going for faster!

[mrwzrd59]

Nwebie here compared to most of you. I own a Pro Boat Stiletto (planes and heli's too) but am looking to go much faster. I like the Hobbyking Genesis and the Osprey but am leaning towards a cat hull. I'm interested in supplying the motor and esc but I dont have any experiance with outdrives and rudder set-ups so I'll probably end up getting the Genesis that is more ready to go. I looked at the BlackJack and Mystic but they look a little small and I dont know if they will let me push them to 60 mph and beyond.
I'd like to get to know some of you so any suggestions or direction pointing is OK with me.
About me; Retired tool&die maker/cnc machinist now cad designer and sales engineer for a thermoform plastics company. Too many motorsports projects to list here but Indy, CanAm and Vintage Road Racing is my background....Bonneville is next on the bucket list!
Motto; If its low, sleek and fast, I'm there!
Thanks, Phil

[dana]

What are you looking to do, race, sport, saw? What's your budget?

[G-UNIT]

You seem to have the knowledge to make every thing you need to make for this hobby and hopefully the tools / machines.
I take it that your talking about the new blackjack 29, everything is possible, but take into concideration thats its only 29" long, hull size and add 3" inches more for strut length, 31-32 total length, not really sure just guesing.but it is possible.
are you talking a twin set up, or single set up.
I have only been doing this for two years and still learning but since I am posting my thoughts I'm sure this will trigger other responces.

[mrwzrd59]

No racing for now...I'd consider racing the Stiletto against other Stiletto's but for now i want to go beyond 60 mph. I kind of dig the Genesis because of the opening price and the clear coated graphics. Little steps is OK but I also dont want to waste any more time like I've done with the Tunnel Hull/Outboard. Fast in a straight line, good looks, low maintenance and plenty of wet time. I'm easily in for a grand all up. Beyond that will come later after I know for what I do.
Phil

[mrwzrd59]

Single out drive, single rudder...Simple, low drag, adjustable and low maintenance. I quickly learned the goofy drive losses with the Outboard. The stock shaft with the teflon was 3 mph quicker that Darin's metal to metal set-up for me. That right there is one of the drawbacks I see with a Cat. I dont like that curved drive tube but it's way less severe than the outboard. Anyway, I've studied the Osprey, Impulse 31 and several other V's but I like the way cats can fly...I have some ideas OK? ;-)

[JonD]

.........I like the Hobbyking Genesis and the Osprey but am leaning towards a cat hull.

Opsrey will be better (exciting!) in rougher water. Genesis good in very calm water but can't handle to much "chop"

Jon

[SirBudman32]

Hi and Welcome,
As a Genesis owner I would say to go a different way, Genesis is good in a straight line but any kind of turn and forget it, Barrel roll city. First thing I would say is the hull is kinda weak and needs reinforcing. Second thing is the drive line is weak as well, it has a two piece flex shaft that is a pain the clean and grease and is only 4mm. So if you wanted to get any good speed out of it and want it to last need some glass work to the tunnel and the upgrade the drive line. I to like the looks of the Genesis but I think it looks better on the shelf than the water. Just my 2 cents.

[mrwzrd59]

Well...I talked myself into an Impulse 31 V2. Yes I know what I had to say about "flying cats" but the nearly straight shot, one piece and 3/16" out-drive lured me in to going Vee. I had a very unique opportunity to look over a new Genesis bare hull and was impressed with the build quality as in negatively!!! Yikes! I used to own my own fiberglass shop and I know what I'm looking at. There were several spots of air entrapment and just plain poor lamination quality throughout the entire hull. Uh...No thanks man, can I see another! The resin still had some high tack going on so how this thing made it past any form of QC is beyond me.
The new Impulse will be here on Thursday and I'm happy to stop thinking about it. I'm not so happy that its only available RTR but a spare radio & rx on the shelf is not a big problem. Having a hull that self destructs IS! R&L Hobbies in Portage MI let me dig thru their grab-bag of "boat stuff" and I picked out all of the props that looked like worth having for just a few bucks each. I can list them later if anyone cares to know. I'm ordering a heftier Turnigy 180amp ESC to knock off one of the future limiting factors straight away. I picked up a new pair of Venom 7.4v 5000mah 40c's for starters and will learn some lessons before going crazy. Motor will be next to go but havent decided on which one yet.
BTW, I also had an Aquacraft Revolt out of the box and wasnt impressed either. Bad paint (orange peeled), shoddy decals (comming off) and loose fitting bits that had never seen a file or burring wheel helped me make up my mind. More to follow...
Phil

[mrwzrd59]

Thanks for the advise. You'll see that I went Vee Vee Vee all the way home! (New V2 Impulse 31) My son-in-law and his blistering fast Spartan also had a hand in me going with a Vee. Apples vs apples ya know. Besides just plain feeling the need for speed, I want to learn how to set these up too and the really wild stuff will come when I'm ready for it. I dont want to burn down my path with a flame thrower, just slice it down neatly so I know from where I come. I want to experiment with run times, smooth, reliable running and get a clear direction before going too big. The engineer in me must be fed too! 60 plus mph seems like a good number to start shooting at without smoking off a pile of cash.

[dana]

60+ ain't easy to get to reliably

[Make-a-Wake]

Dont now why you chose a 30 inch hull to go 60+ mph....................any small cross-ripple/wave etc can flip it easily. 50 is a more realistic, safer speed. The difference between 50 and 60 is exponentially much greater than 20-30 as an example. The Spartan is 37" and has trouble over 50..........sometimes well below that. A DF35 or 41 would have really fit your desires better.

That being said, you need at the very least a Leopard 4074 1400kv on 6s2p. The 2p for the amperage needs, as well as some weight to hold it down. A 4082 would be a better choice yet in the 4D(1450kv) on 6s2p.............the 4082 with an x448/x450 or x645 will be needed to get you "up there".

[mrwzrd59]

I'm gatering that fact. GPS has the aforementioned Spartan at 57.8 mph on 6s 40c's, 80amp esc with a sharp/balanced prop (but I dont know the spec's). We burned out the drive tube and melted the plastic chassis in doing so too! The motor, esc and batt temps were in the 130 F range. Learned some valuable lessons that day!

I'm cnc machining a new billet alloy chassis but one would suppose that if we see some real heat again, it will travel into some even more expensive bits, like the hull!

[Make-a-Wake]

He could have built a nice DF35 for the same price as that Spartan that he is trying to "max out"...........you already see what that causes.

I built the 39" Mono in my signature for $380 total.

[mrwzrd59]

It's a live and learn thing...He now wants to go with a complete custom from the ground up. He saw all my planes and heli's, showed some interest but is really a "boat guy" sooooo.... He went Spartan and is learning his lessons. I'm now running boats to help spend some quality time with him. I bought him a heli and it sets on the shelf. He was stressed out flying one of my RC trainers and told me "it just wasnt relaxing like it is for me". They have a Master Craft 21' ski boat and live on a lake and so there's where we are now. We load up his boat (my wife and daughter included they dig the boat ride) and head for the smooth water at the west end of the lake and convert some rengade electrons into heat energy. When we're done, my daughter ski's on the way back to the other end of the lake so we all dig the time together. The rc boats set up on the engine cover in transit and we draw a crowd by the time we anchor in. Something about an audience is just plain cool too. Sooooo, I'm getting mine feets wet and progessively working and learning with a boat that will require some skill to make go fast. Then, pull the trigger on some bigger stuff. I did the same thing with planes.

[Brushless55]

Dont now why you chose a 30 inch hull to go 60+ mph....................any small cross-ripple/wave etc can flip it easily. 50 is a more realistic, safer speed. The difference between 50 and 60 is exponentially much greater than 20-30 as an example. The Spartan is 37" and has trouble over 50..........sometimes well below that. A DF35 or 41 would have really fit your desires better.

That being said, you need at the very least a Leopard 4074 1400kv on 6s2p. The 2p for the amperage needs, as well as some weight to hold it down. A 4082 would be a better choice yet in the 4D(1450kv) on 6s2p.............the 4082 with an x448/x450 or x645 will be needed to get you "up there".

He could have built a nice DF35 for the same price as that Spartan that he is trying to "max out"...........you already see what that causes.

I built the 39" Mono in my signature for $380 total.

Yes, and yes...