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My son's .12FF

Old 09-03-2007, 09:42 PM
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hydroracer11g
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Default My son's .12FF

First let me say thank's for putting such a great kit together Tom M. It has taken my 10 yr old and myself about 9 mo. to build this little rigger. Not because we are slow builders. But because my son has paid for everything except for the kit. He had to shovel a lot of snow and cut a bunch of grass to pay for it. What do you all think of it?
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Old 09-03-2007, 09:51 PM
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wave waker
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Default RE: My son's .12FF

very neat! keep posting how's thing go.
Old 09-03-2007, 10:07 PM
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TheRealDeal
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Default RE: My son's .12FF

Looks great!! any more pics?,I just got the same kit in the mail a couple of weeks ago and am very interested in how you set up yours
Old 09-03-2007, 11:05 PM
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Default RE: My son's .12FF

I think it looks sweet, excellent job!!! I wish mine looked that good still


Paul
Old 09-03-2007, 11:36 PM
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Default RE: My son's .12FF

Looks like you guys did a great job building that rigger!
Old 09-04-2007, 12:41 AM
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Justaddwata
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Default RE: My son's .12FF

Looks a first class job.

Have to hand it to you for teaching him about working for the goal - I would have grown impatient and sped things up a little

Hope you will share some pics or video of her in action
Old 09-04-2007, 12:58 AM
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hydroracer11g
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Default RE: My son's .12FF


ORIGINAL: TheRealDeal

Looks great!! any more pics?,I just got the same kit in the mail a couple of weeks ago and am very interested in how you set up yours

I will try and take some more pic's soon.

Justaddwata Believe me I wanted to buy things and speed it up but the Mrs kept me from doing it.
Old 09-04-2007, 08:35 AM
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ralph289
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Default RE: My son's .12FF

You and your son will have a BLAST with that rigger, it is so much fun to run ! If you have any problems on the set-up to get it to run right this is the place to ask question. The guys on this site are VERY help full. I run mine just about every week and love it ......seems to be getting faster all the time.
What engine are you running ?
Good Luck.......nice job !
Ralph
Old 09-04-2007, 02:21 PM
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Default RE: My son's .12FF

Almost looks like the dynamite .12 Just has all the head fins..
Old 09-05-2007, 04:51 PM
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Default RE: My son's .12FF


ORIGINAL: toyotatruckin

Almost looks like the dynamite .12 Just has all the head fins..

You are correct! It is a Dynamite.12SPD

I'll let you all know how she runs after we get out tomorrow.
Old 09-05-2007, 04:59 PM
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ralph289
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Default RE: My son's .12FF

Same engine that is in mine, should run fine with a small prop.
What prop are you using ?
Ralph
Old 09-06-2007, 10:30 PM
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Default RE: My son's .12FF

Ralph we are going to try a Prather SS215.

We did not get out today.[&o] Maybe next week.
Old 09-07-2007, 10:15 AM
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ralph289
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Default RE: My son's .12FF

I have had no luck with the 215 prop. I don't think the Dynamite .12 has enough HP or torque to turn it. I started with a X632 but have found the GrimRacer 36x55 works the best with that engine for me.
Let me know how the 215 works out for you.
Ralph
Old 09-07-2007, 11:45 AM
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Default RE: My son's .12FF


ORIGINAL: ralph289

I have had no luck with the 215 prop. I don't think the Dynamite .12 has enough HP or torque to turn it. I started with a X632 but have found the GrimRacer 36x55 works the best with that engine for me.
Let me know how the 215 works out for you.
Ralph
I was just about to buy a GrimRacer 36X55 yesterday. Just wondering, what is your set up like? Is the botton of the rear sponsons running at prop shaft centerline or is the propshaft deeper?

Mark
Old 09-07-2007, 01:39 PM
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ralph289
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Default RE: My son's .12FF

YES, the botton of the rear sponsons is running at prop shaft centerline . And I have ZERO tilt on the prop, not down at all and not up at all. Seems to work for me.
Ralph
Old 09-07-2007, 02:07 PM
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TomMoorehouse
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Default RE: My son's .12FF

Looks great! I hope you and your son have a lot of fun with it!
Old 09-07-2007, 03:23 PM
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Default RE: My son's .12FF

I have the OScvr .12 , I don't have a .150 prop shaft so I cant use a 36x55, I use either a 215 or a 40x53 I haven't checked which is faster but by looking I would guess they run real close to the same speed (45-47mph). I have a .130 flex with a .187 prop shaft, I will be rebuilding the tub this winter if anything you could call my .12 Frankenstein right now (there is a patch holding the front and the rear together (hitting buoys and shore will tear up these little boats, especially at full speed)). If your boat doesn't preform don't let it get you down they do sometimes take time to get them set correctly to tun the way you would like, you may need to cut some cooling fins of your engine also (just so it can build up some heat). My boat isn't the FF model it is the Blazzin plans model modified a little. I do have some current pics of it in the winter build thread if you care to look, Ralph has some there also.

Paul
Old 09-09-2007, 10:07 PM
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Default RE: My son's .12FF

Well we got out tonight. But could not get it on plane.[&o] As Ralph said the the Dynamite .12 is a little under power to pull a Prather 215 prop. That is the only one we have. I'll be off the the LHS tomorrow for a smaller one.

Ralph, Did you just drill out the bore to .1875 on the GrinRacer 36x55 prop? Because I checked it out online and it has a .125 bore.

Mark
Old 09-09-2007, 11:01 PM
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Ron Olson
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Default RE: My son's .12FF

if you could, get me a transom shot. I might be able to help you out with a few things.
Old 09-09-2007, 11:06 PM
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Default RE: My son's .12FF

I will try to get some tomorrow Ron. I am also going to get some smaller props if my LHS has some. They are just starting to get some of the GrimRacer props in.
Old 09-10-2007, 06:28 AM
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ralph289
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Default RE: My son's .12FF

No I didn't drill out the bore on the smaller props, I used the cable Offshore electrics sell,
Product ID: oct-oc64pkg
Octura .130 cable system for 1/8" props Details
Octura .130 flex cable and 3/16 to 1/8" prop shaft for 1/8" props
http://www.offshoreelectrics.com/products.php?cat=70
Old 09-10-2007, 09:50 AM
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hydroracer11g
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Default RE: My son's .12FF

Ron, Here are some pictures of are setup.

Thanks for the reply Ralph. Did you do anything else to the motor? Like take out the head shim or change it to the smaller .01mm one. How much nitro are you using?
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Old 09-10-2007, 10:03 AM
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Ron Olson
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Default RE: My son's .12FF

Nice hardware but one problem is that it adds a lot of weight to the transom. When building a small boat like this, the keyword is to go as light as possible.
On my first one I used Octura parts and the second one Hughey hardware. The Hughey pieces were really heavy compared to the Octura. I went light also in the radio box using Hi-tec HS-81 MG servos, a small 4-cell RX pack and tiny receiver.
You and your son did do a great job on building the boat though. These boats are a learning experience. Each time that I do a build, I'm always finding other ways to do something.
Old 09-10-2007, 10:35 AM
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Dan S
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Default RE: My son's .12FF

removing or adding head shim will depend on what percentage of Nitro you are using.

Low Nitro requires more compression to burn, removing shims will bring your compression up, high Nitro require less compression to burn, adding shims will lower the compression ratio.

too much compression on high Nitro will cause advance (early) detonation taking away the performance you are looking for and may cause internal damage. So on so forth.

Dan.
Old 09-10-2007, 10:39 AM
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ralph289
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Default RE: My son's .12FF

Yes Ron is right light hardward is nice but mine it heavy (some what ) too and seems to do well.
I am running a REAL small battery pack that I really like, http://www2.towerhobbies.com/cgi-bin...1&I=LXHBB0&P=K
Yes I am still running a head shim, believe it is .003 and 30% nitro. Also run my high speed needle 3 turns out.
Took me a month or two to get mine sorted out. These riggers are a real learning experience (I still have a lot to learn) but once you get it right you will LOVE IT !!
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