NAMBA 1/10th Scale FE Class Proposal in March 2009 Propwash...

[Darin Jordan]

For those of you who are NAMBA Members, it appears that a group has put together a proposal for 1/10th Scale FE as a class in NAMBA. The proposal and ballot were mailed out in the March 2009 PropWash... I can't seem to find an online version of the proposal. If I do find it, I'll post the link here...

From what I understand, the major 1/10th scale clubs together, along with some people from Puget Sound Fast Electrics, and all hashed it out to try to make something that would work for NAMBA. I saw of rough draft of this several months ago and voiced some concerns (abiguities, etc.), but apparently this is what we get. I believe the group passed this around to several others across the country as well to get feedback.

If you don't get too wrapped up in the rules, it's a really fun class, and the P-Spec power systems are MORE than enough power for these boats... unless you build a heavy pig...

Vote away...

[Ub Hauled]

Mailed out in March?! I just got it in the mail yesterday... now that's a snail mail man!!!!

I kinda read it and it looks like fun and affordable, if you do the building... will read it better later.

[Ub Hauled]

Darin is it a good idea to run a 10th scale with reversed turning flex/prop or can one make it work with regular turning flex/prop?

[Darin Jordan]

Darin is it a good idea to run a 10th scale with reversed turning flex/prop or can one make it work with regular turning flex/prop?

Guys have tried running them with Left hand flex and props, but turning left... and it just doesn't handle that well...

I run mine with .078 wire, so the finding right-hand flex isn't an issue... Props are limited, but the ones that are available are all you need really... The standard Octura X447/R works well for most applications, as do the carbon Graupners... 45mm, etc...

[Darin Jordan]

Here is the text from the rule proposal.


================================================== ================


What follows is a proposed new Section 28.D.5.e to the NAMBA Rulebook to establish the 1/10 Scale Electric Unlimited Hydroplane as a Class in NAMBA:

e) ELECTRIC 1/10 SCALE UNLIMITED HYDROPLANE

i) General Rules

(a) The intent of this class is to replicate the look and competition of real unlimited hydroplane racing. Boats are 1/10-scale replicas (one inch equals 10 inches) of the real boats that have raced on the unlimited circuit. This class shall emphasize scale accuracy.

(b) Electric 1/10 Scale Unlimited Hydroplane rules will follow the Scale Unlimited Hydroplane rules (see Section 21) with the exception of the following, and are intended as a supplement to the Electric General and Sport Hydro rules. In the case of a conflict with the Scale Unlimited Hydroplane rules (see Section 21) the Electric rules will prevail.

(d) This Class shall be divided into two sub classes that shall run separately:

(i) The Vintage Class is defined as those boats conforming to NAMBA Master Hull Roster (MHR) Numbers 2730 through 7008 inclusive, and MHR Numbers: 7102, 7132, 7171, 7206, 7221, 7422, 7499 and 7505.

(ii) The Modern Class is defined as those boats conforming to NAMBA MHR Numbers 7025, 7029, 7175, 7177, 7207, 7251, 7325, 7402, 7441, 7455, 7495, and MHR Hull Numbers 7571 through 0717 and beyond.

ii) Vintage Hull Specifications:

(a) Belly pans or blisters, if added, must be no larger than 2.5 inches wide by 4 inches long.

(b) Air dams, if installed, must be below the deck line and unobtrusive and not extend beyond the bow.

(c) Anhedraled left sponsons and modern style sponsons are not allowed on boats running in the vintage class.

(d) Skid/turn fin shall be mounted to the inside of the left sponson and shall not extend beyond the back of the sponson. The size is limited to a maximum of 2 inches wide by 1 inch deep measured from the sponson riding surface.

(e) Boats shall use a single rudder at any mounting location on the transom. The center of the rudder post shall not be located more than 1.25 inches behind the transom.



iii) Drive Train

(a) Any shaft may be used provided it maintains a straight line from hull exit through the strut.

(b) No gearbox of any configuration is allowed.

(c) Any single propeller may be used, and a portion of the propeller must be under the transom. The drive dog is defined as not a part of the propeller.

iv) Motor Specifications

(a) Power in this class shall be limited to a single HIMAX HB3630-1500, BLACKJACK A3630-1500 or AQUACRAFT 36/56 (commonly referred to as SV27).

(b) No modifications may be made to the motor. Except for normal wear, drive flats or keys, electrical connectors and water cooling, it must be run as shipped from the manufacturer.

(c) Power Limits: 10.1 to 15 Volts nominal, any chemistry. Maximum of 2 packs in parallel. Maximum total capacity shall be 10,000 mAh.

v) Modern Class Specific Rules: All rules listed above apply to the Modern Class boats except as follows:

(a) Any shaft may be used.

(b) Sponson design shall be up to the builder as long as it does not change the outline shape of the hull.

(c) Skid/turn fin shall be similar in appearance and location to the full size boat (mounted to the back of the sponson). The size, shape and precise location shall be determined at the discretion of the owner. No hook-shaped skid fins are allowed.

vi) Race Format shall be as set forth in Section 21.B and as follows:

(a) All boats shall travel COUNTER-CLOCKWISE around the course turning Left.

(b) A one minute countdown procedure using an audio countdown clock shall be used to start each heat. The start of the race is at the initial sound of the horn/gun.

(i) A boat must be in the water and running at the 30-second mark. Once running, a boat must remain in constant forward motion or be assessed a one lap penalty.

(ii) All boats must fully circle the right and left hand turns (in that order) before being allowed to start.

[Steven Vaccaro]

They allow 10000mah but limit the motor? If they are trying to keep it an inexpensive class its backwards if you ask me.

[Ub Hauled]

I agree Steven, I think 10k mAh is a bit over the top, I think 6000mAh would get you thru the finish line w/o too much strain on the cells... does anyone have numbers on the A consumption on a full race?

[JimClark]

I have never seen anyone use 10000mah everyone I know uses 5 to 6k. I seriously doubt that MAH number came from CT or ERCU reps.

Jim

[D. Newland]

60 amp average burns 1000 mah's per minute, and that's right in the ballpark of the spec systems.

The Az race had spec riggers pulling anywhere from 1900 to 2400 mah's during a heat race, and LSO (which nearly ran 4 minutes due to our course size) were pulling 3200 to 3800 mah's.

The 10,000 mah limit is moot for spec class racing. It only adds weight to the hull and the increase in voltage at that (limited) amp draw will amount to almost nothing.

It really doesn't matter if it's in (or not in) the rules. They were probably just trying to go off of the existing P power requirements.

[Darin Jordan]

It really doesn't matter if it's in (or not in) the rules. They were probably just trying to go off of the existing P power requirements.

BINGO!

[Sidetracked Tanget Topic Steeling Mode = ON]
As far as I'm concerned, we should just DO AWAY with the paralleling and Mah limits... they are meaningless and a waste of time... WHY should I care if someone wants to make a 4000mah pack by paralleling 4 1000mah cells together??? This stupid rule eliminates a lot of otherwise perfectly acceptable cell combination possibilities, and, if people looked a little closer, is likely making some peoples current cell setups illegal, because there are many lower cost "6000mah", etc., packs out there that are built up just this way, and people likely don't even realize it...
[/Sidetracked Tanget Topic Steeling Mode]

Anyhow... The entire P-Spec philosophy is simply to leverage off of existing power rules. That way, you only have to update them in ONE place...

[Ub Hauled]

well fine then... if you wanna put it this way then it makes sense to me...

Besides, who can complain about less rules to read about...

[Darin Jordan]

This here is the kind of CRAP that would really throw a wrench is people racing "Scale"...

http://www.intlwaters.com/index.php?showtopic=32488&hl=

Especially since this one seems to directly affect MY BOAT! I'm going to be PISSED if I have to do a repaint in order to continue racing this boat...

[Ub Hauled]

I feel your pain Darin, but talk to a "liar" before you paint, you are not trying to sell your stuff, and not racing for money, it may be one of those things that it may be ok for you use it.
There is a VERY fine line between racing these for fun and being a copyright infringement... maybe you should use one of your sponsors, hehehehe.
I think there may be a loop hole since they are a public figure, but I am not a lawyer, so I am not sure.

[Bill-SOCAL]

As has been pointed out on the IW thread, unless you are building your boats and selling them then you have very little to worry about. The unauthorized use of logos and such really only gets dicey when you are doing it for commercial use. Private hobby use is not ordinarily an issue.

Corporations tend to be very protective of their trademarks and logos. Doesn't matter who, Dewalt, Boeing, Home Depot, they all get bent when they find their logos being used for unauthorized commercial purposes. The absolute amount is irrelevant.

[Rex R]

in my limited experience with 'sponsers', I've been told that; most businesses consider what we do to be in the nature of bumperstickers (free advertising). also helps to ask 1st and let them have the final say(yay or nay) before you go public. the folks at my bank have asked me if 'their' hydro will be racing this season .
rex