JetChopper30 on P-Power

[properchopper]

After setting, and currently holding the NAMBA P-Ltd Mono SAW record with my first JetChopper30 and building a "hotrod" version for Christian Z. in Chile, I decided to build a hotrod for myself. Having just decommissioned my Wacko dual rudder MM and having a spare Catle/Neu 1515 1Y 2200KV motor and a T-180, I set out to have some fun and add a litle bling.

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[properchopper]

I'm a fan of Spd stingers but I needed to shorten it to have the correct relationship with the Spd .21 rudder, which was shortened

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OSE tabs and large fins. (three holes for bling)

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To spread out the motor mount load, made some platforms for strength

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[I started with a Promodel motor mount that had the useless-for-inrunners front mount which recessed the motor bolts and made them hard to line up. Instead used an Etti center section which I added a top bolt to keep things lined up.]

[Brushless55]

Looking forward to the video on this one Tony!

[properchopper]

3/8" brass tube for servo rod to pass-through without binding on full articulation

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narrowed the T-180 since it was getting placed next to motor in tight quarters - (hopefully one day the trusty T-180 ESC will have the water inlets/outlets going the same directions as the wires) Made a platform for the ESC to anchor it

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Favoring the "rear-motor/batteries-on centerline" design to keep weight low & centered (which I presume minimizes chine walk) (btw it worked) I made 3/32 birch ply battery trays spaced off the bottom to allow one-wrap velcro to keep batteries from strolling around and G/Flexed them in with holes to add epoxy strength/bond

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[properchopper]

Looking forward to the video on this one Tony!

It's coming after the full build post is done :wink:

[properchopper]

The HRC water jackets come with small diameter fittings; replaced with larger ones after re-tapping holes

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same for rudder

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Waterlines short and neat inside

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Angled outlet makes output easier to check - less wind-shear effect

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[properchopper]

I'm a big fan of hatch retention. Tabs in front

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CF in back with tapered "locators" (CF can be tapped with threads!) BTW in this picture you can see the Etti center motor mount with easily accessible bolts

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Purdy 4mm anodized thrumbscrews through rubber grommets

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(somehow an FE30 picture snuck in & I can't figure out how to back it out :noidea:)

[properchopper]

Some Beauty shots with a big Thanks to MonoJeff for the nifty windshield
Notice the ride-pad bottom.

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[properchopper]

I usually don't record the first wet but I was alone in the park until a bunch of kids walked by so I commandeered a 9 year old girl to take the vid. I'm happy with the way it ran; need to center-trim the rudder and bolt on a bigger prop, but looks good so far :

http://www.youtube.com/watch?v=2W2ihCljk8E

[srislash]

Looks good Tony.Dang fine for first wet.Wish I could do that.

[properchopper]

Looks good Tony.Dang fine for first wet.Wish I could do that.

Thanks.Next time I'll prop way up & see what happens :sinking-guy:

[properchopper]

Some say that ride-pad hulls have trouble in chop. My P-Ltd JetChopper30 doesn't seem to mind http://www.youtube.com/watch?v=qkiTfVT1LaE

[Rocstar]

Very cool sir, as always. Diggin the tabs and thumb screws for the hatch....:cool2:

[Brushless55]

Looks and sounds great Tony!

[TheShaughnessy]

Yep I was cruising along admiring the build and then a yellow Fe 30 pops up . Butterflies and nightmares. :(

On a brighter note I'm pretty stoked on how my pursuit is running with some tired batteries , can't wait to pick up my dinogys. Not sure how long it will be before my new hatch gets here so I made one that looks good from 50 ft away. Also got a nice big rudder on there, huge difference.

I'll be running p ltd cat next weekend, assuming the boat min. Is met. Could use a tune day before hand, water is usually flatter down there then when I run up here. Might have some free time mid week if you are gonna run at all before the race.

[properchopper]

Very cool sir, as always. Diggin the tabs and thumb screws for the hatch....:cool2:

Allows quick removal when needed :ohmy:

IB34 P-Mono

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Works on Cheetah's as well :wink:

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[properchopper]

I wish my FE30 would pop up (the one that's on permanent display on the bottom of McKellips pond in Scottsdale :Sinking:). There should be no problem making the P-Ltd Cat class minimum- only three boats are needed with the SCSTA -Boyd may show as well plus Stephen, Naveed and me.. Might have some practice time next week ; let's talk :thumbup1:




Yep I was cruising along admiring the build and then a yellow Fe 30 pops up . Butterflies and nightmares. :(
On a brighter note I'm pretty stoked on how my pursuit is running with some tired batteries , can't wait to pick up my dinogys. Not sure how long it will be before my new hatch gets here so I made one that looks good from 50 ft away. Also got a nice big rudder on there, huge difference.
I'll be running p ltd cat next weekend, assuming the boat min. Is met. Could use a tune day before hand, water is usually flatter down there then when I run up here. Might have some free time mid week if you are gonna run at all before the race.

[BakedMopar]

Looks good Tony. Sorry for the newbie question but who makes the hull?

[properchopper]

Looks good Tony. Sorry for the newbie question but who makes the hull?

I have a direct connection with the maker in China. Might end up with a distribution deal.

[leo_home]

Hello Tony,

I am testing with various strut/stinger length. I refer to John Finch's MONO MANIA (http://web.archive.org/web/20001018194050/http://www.intlwaters.com/fvrcb/monomani.htm). I believe 8.5% strut/stinger length is a pretty good value, reduce porposing. I have a rudder similar to yours. I modified the rudder to match the strut/stinger length:

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Longer rudder mount lift the transom in a turn.

Rgds,


Leo

[leo_home]

Hello Tony,

I race NAVIGA style offshore, eq. to oval. My JC30 weighted 3490g(7.7lbs). Lift and speed were high. I will either add ballast or reduce the pad area. Will try add ballast first, make it 3595g(7.93lbs). The desigh was refer to Jim Russell's article "Why does a 'pad' make a V-hull faster?". Bigger pad not necessarily better. Depend on boat set up.

Rgds,


Leo

[785boats]

Hi Tony/Leo.
I wish I still had my JC30. But unfortunately it was T-boned by another boat & basically destroyed.
Might have to get another one soon.

Nice work, as always, Tony.

Cheers.
Paul.

[leo_home]

Hello Paul,

Let me know before placing order. We will soon have the Lunar New Year Holiday.

Rgds,


Leo

[leo_home]

Hello Tony,

I run rc boat with some other boaters. But no one could help me to take video for most of the time. I made some tool to help take video by my own:
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[785boats]

Thanks Leo.
I'll do that.