New Member New Project With A British Twist

[British Bulldog]

Afternoon all!

I'm a new member to the forum and as the title hints British, my girlfriend recently purchased me a new FE hull for my birthday from offshore electrics, so while I wait for that to arrive, I though I would take a few moments of your time to say a bit about myself and my intentions.

My Gf purchased the deltaforce 26" deep v mono hull for me (as directed) a hull i have found to be very capable of top speed and handling with very few stability problems, i'm sure many of you may know by now the Chinese produced knock off version of the hull, renamed the HOR rocket, or prince which its most commonly called. I have seen this hull in action and to be fair its a great little hull for a direct rip off, I have also seen the delta force go head to head with pretty much the same setup and honestly it pwns it outright, I just had to get my hands on one and turing 30 i needed a change of pace from the normal antics i get up to.

I'm not sure of the rules you guys use when racing hulls of this size, but here where i am there are a few rules to the boats in one particular class i will be entering this boat into, i will explain slightly later once the hull arrives and i can share my build with you, this will better explain why i'm using certain parts which may or may not seam a bit odd.

Well once the hull arrives ( I expect around 10 days or so) i will crack on and give you guys a bit of entertainment. thanks for listening.

Best Regards Bulldog

[sundog]

Welcome. Looking forward to seeing the build.

[British Bulldog]

Thanks for the warm welcome sundog.

As a bit of heads up i'm planning to run with most likely a strut and short rudder to keep the rear compact, but subject to change as always with any build, running off a inrunner 2680,4050 BL on 3's, i expect 32 or 35mm 1.2 pitch prop maybe 1.4 but yet this may change when doing trials, my aim is to beat that magic 55mph mark i expect that i can get 40-45 quite easily with a bit of light tuning, but i have a feeling i may have to push up to a larger motor to achieve this, but that will be subject to weight and tuning of the part's.

Any heads up advice is welcome, even perhaps if someone could give me some stats of the hull, is is GRP or polyester resin formed? (this will tell me if i need to add extra CF to the inside to help strengthen the hull) is the transom reinforced with a ply insert or will i have to fit one myself, or is is it recommended to increase the transom strength?

All these little bits will help me decide what to do and make my best laid plans feasible.

Best regards Bulldog

[NativePaul]

Welcome.
I guess your setting it up for Mono1 with a smaller than usually seen 28mm motor on <280g 2s1p or 3s1p?

I'm interested in seeing this build as nearly all Monos round here are stepped hulls, the only hulls I've seen competing that aren't are the Hydro and Marine No-Step series.

Where in Britain are you? I'm in West Sussex and race with Electra and Ostend Ospreys, but also try to visit the other regions once a year and the Nats too.

http://www.electrafying.com

http://www.ostendospreys.com

[British Bulldog]

Yes bud mono 1 indeed, i'm based in south east Devon, i have seen a lot of stepped hulls in the class run locally but have always found they are very 'skittish' when they hit some wake from other boats, on calm water man they fly but hitting rough they have to ease that throttle a bit.

I'm going with a 28mm motor as these little lepoard baby's do a great job with a small light weight hull running on 3's. also at £50 a motor paying any more becomes undesirable with my budget. If you have any recommended motors that would do a better job please by all mean post away, i would be interested to see what power plant & esc you would be running with. As i said nothing laid in stone everything can be changed.

best regards Bulldog

[NativePaul]

I just changed from a 2s setup to a 3s setup in my Mono1 a twin stepped tenshock hull, I agree with steps being less stable and find hulls with 2 smaller steps to be better than single steps in that respect, I went with a 3400kv leopard 2860, on 3s ETTI 4500mAh with a de-tongued X435, but cant recommend it at the moment, it was pig slow, dont know if it was the motor ESC or LiPo but it definately had a problem somewhere, it was a good 10mph slower than my 2s setup of 4100kv HET 1w30 on 2s ETTI 5800mAh with the same prop, I was getting lapped every 3 laps by the fastest boat and I had only 12% left in the pack after the runs so not much room for propping up.

A 55mph Mono1 is very optimistic by the way, my Hydro2 was around that speed in oval trim at the last records day and I think the current world champion Mono2 was around 50 in oval trim, I would expect around 45 from a good Mono1.

[Basstronics]

I got the "Prince". Have you visited the thread on RC Universe? Its chuck full of info.

I started out with the boat and still have it. Looking to Upgrade to a Pursuit soon.

My last runs were with a 3656 3000Kv @ 3s 4400 40C batts and K42 prop for 38 MPH @ 180 Amps. Ive tried a few props, a 42 x 1.4p seemed to work well but the plastic props wont stand up to the motor. Ive tried an X437/3 and it didnt work well for speed...

My next attempt will be hopefully this weekend with a Leopard 4074 2000KV @ 4S 5000 mah w/X440/3 prop.

I used to run a 2868 almost 3000Kv motor. It worked but a little small. Your prop selections seem very small. Its been noted with these hulls the X437/3 into the 42 prop area works well. Theres been a lot of testing, tuning and wasted money in the RCU thread. I suggest reading it and building a boat upon that testing.

Heres some pics:

[Basstronics]

http://www.rcuniverse.com/forum/m_7713767/tm.htm

[British Bulldog]

Thanks for the info Basstronics i will look a bit closer into the motors, at the moment is all speculation as to what i'm going to do, you know when you get a set idea in your head, then change it.. lol here we go !

Regards Bulldog

[Boaterguy]

a 4050kv motor on 3S? that's alot of RPM.

[British Bulldog]

That was what i was recommended for a mono 1 hull, maybe a larger prop is needed rather then my estimated 32-35, perhaps i should be looking around the 40- 42 mark? This is my first FE build (not my first boat build) so all help and advice is very much appreciated, I've learnt a lot over the past few months searching about before i make that dive in.
I've stood at the side lines and watched these guy race these boats for months and you get that itch to have a go, well this is my attempt, putting the boat together is the easy part, its making sure all the parts i put in are all going to work well together.
Right now it seams the motor, props size and pitch are my only real issues, i'm still tossing up between the 3/16th strut or the 1/8 (3.2mm) strut, i'm heading more towards the 3/16 for the range of larger props between 35 to 55mm that are out there and if i have to go larger on the motor then that's been suggested then i think the 3/16 shaft is the way to play it.

Best Regard Bulldog

[Boaterguy]

I'm not saying put a bigger prop on, a motor of that kv on a boat will be a 2S motor, on 3S go with this motor http://www.hobbyking.com/hobbyking/s...idProduct=5145
the 35mm prop will go good on this.

[martin]

4050kv on 3s is way to high ( 45000 rpm unloaded ) escpecially for racing mono 1 where you also have to get the runtime in as well, 40-42mm prop is also to big. The DF 26" on a 28mm can motor on 3s will do around mid to high 30s mph. Martin.

[British Bulldog]

Ok that's great advice, that hobby kind turnigy motor looks pretty cool it was even mentioned in the post i read up on over at rchobby, basstronics suggested, just out of curiosity if i ran the 4050 with 2's 5000mha pack rather then 3's would that be a more reasonable rpm output with a smaller prop? what speeds would i been looking at? mid 30's low 40's? i need to get in 6 mins +10 sec mill time so say 8 mins off the battery to be on the safe side

[Boaterguy]

that's about right for the 2S, but you'll be drawing lots of amps, A 3S lower KV, even lower than 3600, maybe 3300 would be better, then you'll be drawing less amps.