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TOPIC: Gas in the F Class

Gas in the F Class 8 months 2 weeks ago #746

Here is the rule on the Gas in the F class it was submitted by Then D5 Director Mark Bullard in September 2007.
Mark Bullard would like to suggest a change to the IMPBA Rule Book page K - 2, Technical Standards,
Engine motor and Hull Classifications. The change is the added sentence at the bottom shown in bold
text. If you have comments, please direct them to your District Director.
Technical Standards
Engine, Motor and Hull Classifications
The IMPBA will herein clearly define both engine and motor classes. Any changes to either will require
approval twelve (12) months prior to January 1 they are to become effective. The only exception to this is
if engine classes are so realigned that a currently legal size engine or plant becomes illegal. In this case,
the change will require approval three (3) years prior to the January 1 it becomes effective.
Engine/Motor Definitions and Classifications
1. Displacement
The cubic inch displacement of a power plant shall be the sum total of the displacement of all
cylinders in the power plant. The cubic inch displacement of multi-cylinder engines, two or
more engines driving attached together and two or more engines driving separate propellers
will be added together to determine the total displacement and thus the class the power will
run in. To determine engine class, read calculated engine displacement to three decimal
places, drop all remaining figures.
2. Internal Combustion Engine Classes
Class Cubic Inch Displacement Metric Class
A 0.000 thru 0.129 2.1 CC
B 0.130 thru 0.219 3.5 CC
C 0.220 thru 0.300 4.9 CC
D 0.301 thru 0.458 7.5 CC
E 0.459 thru 0.670 11.0 CC
F 0.671 thru 1.830 30.0 CC
Formulas: CC X .061 = CID, CID divided by .061 = CC
Note: These classes will be Auto Ignition (Glow Plug / Diesel) and
Alternate Fuels (Methanol / Nitro Methane)
For Large Scale Gasoline engine classes see section “I”, Large Scale Gasoline.

Here is a copy of the ballot in the September Roostertail

IMPBA 2007 Ballot #07-004: Engine Change
Ballot to Remove Gas Engines from Classes A thru F
The only change is the addition of the “Note” below the Formulas which will prohibit GAS
powered boats from entering and running with Nitro powered boats. Change is on page K-2
Technical Standards
Engine, Motor and Hull Classifications
The IMPBA will herein clearly define both engine and motor classes. Any changes to either will require
approval twelve (12) months prior to January 1 they are to become effective. The only exception to this is
if engine classes are so realigned that a currently legal size engine or plant becomes illegal. In this case,
the change will require approval three (3) years prior to the January 1 it becomes effective.
Engine/Motor Definitions and Classifications
1. Displacement
The cubic inch displacement of a power plant shall be the sum total of the displacement of all
cylinders in the power plant. The cubic inch displacement of multi-cylinder engines, two or
more engines driving attached together and two or more engines driving separate propellers
will be added together to determine the total displacement and thus the class the power will
run in. To determine engine class, read calculated engine displacement to three decimal
places, drop all remaining figures.
2. Internal Combustion Engine Classes
Class Cubic Inch Displacement Metric Class
A 0.000 thru 0.129 2.1 CC
B 0.130 thru 0.219 3.5 CC
C 0.220 thru 0.300 4.9 CC
D 0.301 thru 0.458 7.5 CC
E 0.459 thru 0.670 11.0 CC
F 0.671 thru 1.830 30.0 CC
Formulas: CC X .061 = CID, CID divided by .061 = CC
Note: These classes will be Auto Ignition (Glow Plug / Diesel) and
Alternate Fuels (Methanol / Nitro Methane)
For Large Scale Gasoline engine classes see section “I”, Large Scale Gasoline.
My Vote Spouse Vote
YES Keep GAS out YES Keep GAS out
NO Allow GAS to run NO Allow GAS to run
Print your name ____________________________________ IMPBA # ____________
Spouse ____________________________________ IMPBA # ____________
Today's date __________________________
Send this Ballot to your District Director by regular mail.
Ballots must be postmarked October 31st, 2007
Ballot to Remove Gas Boats from Classes A thru F
Here is the results of the vote It is the November Minutes in 2007
The minutes were just given to me and I have posted them on the web site.

Ballot 07-004 results, Engine Change (Remove Gas from Classes A Thru F)
District Vote Power
D1 – 15 yes 5 no D1 votes yes 2 votes
D2 – 13 yes 13 no D2 votes yes 3 votes
D3 – no ballots D3 votes yes 1 vote
D4 - D4 votes no 2 votes
D5 – 27 yes 3 no D5 votes yes 2 votes
D12 – 17 yes 0 no D12 votes yes 2 votes
D13 – 2 yes 3 no D13 votes no 1 vote
D14 – 15 yes 7 no D14 votes yes 2 votes
FE – 89 yes 31 no FE votes yes 1 vote
Gas Director Gas votes yes 1 vote
President Pres votes no 1 vote
FE vote is based on membership popularity. Total 14 votes 4 votes
Gas vote is based on majority. Engine Change Passes
Comment by Don Ferrette that this ballot only applies to the International regatta. Clubs can still run gas in
these classes by placing a note on their race flyer. The ballot needed a clarification to this fact.

A special thanks to new secretary Lynne Rupley for finding them in the thousands of files that
she received from John.

I do not know why they were not posted as it was before I was president.

Hopefully This will clear up this on Iwaters

Kevin Sheren
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