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View Full Version : JetChopper30 mono deep v hull frp



leo_home
10-16-2011, 02:32 AM
JetChopper30 mono deep v hull frp

Coming soon

dwr9
10-17-2011, 12:49 AM
The boat looks great. Doug

leo_home
10-18-2011, 04:05 PM
http://www.rumrunnerracing.com/feforums/showthread.php?t=31991

leo_home
10-18-2011, 04:14 PM
http://www.modelpowerboat.com/images/imported/2011/10/5.jpghttp://www.modelpowerboat.com/images/imported/2011/10/6.jpghttp://www.modelpowerboat.com/images/imported/2011/10/7.jpghttp://www.modelpowerboat.com/images/imported/2011/10/8.jpg

leo_home
12-07-2011, 12:27 AM
http://www.modelpowerboat.com/images/imported/2011/12/5.jpg
http://www.modelpowerboat.com/images/imported/2011/12/6.jpg
http://www.modelpowerboat.com/images/imported/2011/12/7.jpg
http://www.modelpowerboat.com/images/imported/2011/12/8.jpg

leo_home
12-07-2011, 12:29 AM
http://www.modelpowerboat.com/images/imported/2011/12/9.jpg
http://www.modelpowerboat.com/images/imported/2011/12/10.jpg
http://www.modelpowerboat.com/images/imported/2011/12/11.jpg

leo_home
12-07-2011, 12:31 AM
Repeated posting. Deleted.

leo_home
02-10-2012, 02:10 AM
861
862

Glow or Electric.

Looking for distributors for this product:

863
864
865

leo_home
02-10-2012, 02:11 AM
Glow or Electric.

Looking for distributors for this product:

866

dwr9
02-11-2012, 01:42 AM
I have read the NAMBA rule book more than once and I don't see anything that would make this boat illegal for mono racing. It would not be legal in deep vee or offshore classes, but should be ok in the mono classes as long as the sides of the pad form less than a 15 degree angle with the keel line. This is the diagram right out of the NAMBA rule book. Doug

leo_home
02-11-2012, 10:15 AM
I have read the NAMBA rule book more than once and I don't see anything that would make this boat illegal for mono racing. It would not be legal in deep vee or offshore classes, but should be ok in the mono classes as long as the sides of the pad form less than a 15 degree angle with the keel line. This is the diagram right out of the NAMBA rule book. Doug

Hello Doug,

Thank you for posting. I have read the rule book too. I did not measure the captioned angle. By observation, the angle should be less than 1 degree. So it is comply with the NAMBA rules. Some guy is building it and intended to race the NAMBA FE mono class. Can see this boat in Winter Warmups late February 2012 in Phoenix, Arizona. See the captioned angle of JetChopper30:
http://www.modelpowerboat.com/images/imported/2012/02/1.jpg

Happy rc boating,


Leo

leo_home
02-15-2012, 12:26 AM
I have read the NAMBA rule book more than once and I don't see anything that would make this boat illegal for mono racing. It would not be legal in deep vee or offshore classes, but should be ok in the mono classes as long as the sides of the pad form less than a 15 degree angle with the keel line. This is the diagram right out of the NAMBA rule book. Doug

Hello Doug,

Eventually reread the latest NAMBA rule book.

***PAD is legal in electric offshore, mono, deep v, cat***
Section # 28
Page # 9
Section Name: ELECTRIC
Revised 5/15/11
2. OFFSHORE CLASSES
...
ii) Stepped hulls and flat keel ride pads will be allowed on both Deep Vee and Catamaran type hulls.


***PAD is illegal in deep v***
Section # 23
Page # 1 of 2
Section Name DEEP VEE
Official Rule Book Revised 3/15/06
C. HULL SPECIFICATIONS
...
2. The angle at the bottom of the keel line must be a V from transom to bow. No flat
pads are permitted on the keel line.


***PAD is legal in GAS***
Section # 27
Page # 3
Section Name: GAS
Revised 2/19/08
C. HULL SPECIFICATIONS
...
2. Monoplane
a. Mono hulls must have a single riding surface at planing speeds. This planing
surface may be flat or a V configuration.

So I believe the PAD is legal in mono, illegal in deep v.

Happy rc boating,


Leo

dwr9
02-15-2012, 01:50 AM
I agree with you on the rules. I actually have one of your Wavechopper boats that I bought from you quite a few years ago. Unfortunately I've never gotten around to putting it together, but the quality of the boat is very good.

leo_home
02-16-2012, 02:02 AM
First made item:
http://www.modelpowerboat.com/images/imported/2012/02/2.jpg
http://www.modelpowerboat.com/images/imported/2012/02/1.jpg
http://www.modelpowerboat.com/images/imported/2012/02/3.jpg
Forthcoming items would be joined by coloured resin to make the joint invisible:
http://www.modelpowerboat.com/images/imported/2012/02/4.jpg

Looking for distributors.

leo_home
02-16-2012, 02:02 AM
First made item:
http://www.modelpowerboat.com/images/imported/2012/02/5.jpg
http://www.modelpowerboat.com/images/imported/2012/02/6.jpg

Looking for distributors.

dwr9
02-16-2012, 11:29 PM
That is a very good looking boat. Have you ever considered making a larger boat for a gas engine? Doug

leo_home
02-17-2012, 09:50 PM
Set up for race NAMBA P-Limited MONO class:

http://www.youtube.com/watch?v=VbGoaJU_G0M

Boat set up and video by: rcboatbuild@hotmail.com

leo_home
02-17-2012, 09:52 PM
That is a very good looking boat. Have you ever considered making a larger boat for a gas engine? Doug

Very busy with the offset moulding and tools to make some hull variation. No mind to make larger boat in the near feature.

Happy rc boating,


Leo

leo_home
03-22-2012, 09:41 PM
http://www.modelpowerboat.com/images/imported/2012/03/1.jpg
http://www.modelpowerboat.com/images/imported/2012/03/2.jpg

Almost standardized process of making:
http://www.modelpowerboat.com/images/imported/2012/03/3.jpg
http://www.modelpowerboat.com/images/imported/2012/03/4.jpg

leo_home
03-22-2012, 09:42 PM
http://www.modelpowerboat.com/images/imported/2012/03/5.jpg
http://www.modelpowerboat.com/images/imported/2012/03/6.jpg
http://www.modelpowerboat.com/images/imported/2012/03/7.jpg
http://www.modelpowerboat.com/images/imported/2012/03/8.jpg

leo_home
05-09-2012, 01:49 PM
As boaters suggested. Need a stronger boat bottom. Tested with one with the rear 55% of the bottom and transom made with double fiber layers, equivalent to 600g/m^2. Weight increased by 90g. Feel that the bottom is now very strong. The hull weight is now 850g.

Believe that can make the whole bottom and transom with double fiber layers and can maintain the same shipping cost. Estimated hull weight should be 880g.

leo_home
06-05-2012, 02:46 AM
Hello boaters,

Since the bottom made with 600g/m^2 fiber. JetChopper30 hull specification changed to:
Weight(new): 850g(1.87lbs)
Bottom and transom shell thickness(new): 2mm
Deck and hatch shell thickness: 1.4mm
Length: 760mm(29.92inches)
Width: 230mm(9.06inches)
Height: 129.5mm(5.1inches)
Deck to keel height: 100.6mm(3.96inches)
Resin: polyester
Fiber: MAT, 300g/m^2 for deck and hatch, 600g/m^2 for bottom and transom
Surface material: gel coat

The bottom and transom are now very strong. Yet, some sort of rails, connecting rods for the motor mount are still highly recommended.

Happy rc boating,


Leo

leo_home
12-17-2012, 04:18 PM
Hello All,

JetChopper30 hull is now NAMBA FE P-LIMITED MONO STRAIGHTWAY RECORD HOLDING.

NAMBA web site record: http://www.namba.com/content/records.asp?EventType=11

Happy rc boating,


Leo

dwr9
12-18-2012, 12:23 AM
Very cool. Congratulationa! Doug

leo_home
05-20-2014, 09:13 PM
We tested with different RUDDER SETUP. Found that this setup has pretty good stability to turn at full thottle:

2796

leo_home
05-20-2014, 09:27 PM
We tested with different RUDDER SETUP. Found that this setup has pretty good stability to turn at full thottle:

2796

Xfactor
05-31-2014, 11:34 AM
Congrats again Leo,
What software are you using? Seems youre design works good. Any plans for a q or s class mono?

Thanks and congrats.
Hugh

leo_home
08-01-2014, 06:38 PM
Congrats again Leo,
What software are you using? Seems youre design works good. Any plans for a q or s class mono?

Thanks and congrats.
Hugh

Hello Hugh,

Sorry for the late reply. The software was SolidWorks. I don't have q or s class.

Happy rc boating,


Leo

leo_home
08-01-2014, 06:39 PM
http://www.modelgasboats.com/resources/tips-and-tricks/tuning/

Refer to Glenn Cupit's article on rudder set up, RUDDER "CASTER", A LITTLE CAR TALK, BACK TO BOATS. Articles talk about rudder length and rudder lift. With many testing, I got the following conclusion on JetChopper30 set up:

Offset the rudder 55mm to the right. Pretty stable turn at full throttle. Rudder too close to the centre line has too much prop., keel lift, lower turn stability. In perfect situation, rudder lift just balance the prop., keel lift.

Happy rc boating,


Leo
3101

http://www.btorcboat.com/images/JC30/JC30_transom_V8.gif

Xfactor
08-02-2014, 01:48 AM
Hello Hugh,

Sorry for the late reply. The software was SolidWorks. I don't have q or s class.

Happy rc boating,




Leo

If u ever drop a Q boat please keep me in mind.

TTYS
Hugh