PRO Commissioners- OSY 400

[James Aderholdt]

I'm glad to be in the PRO Divison (currently racing in Europe). The rules are simple and the racing is GREAT!!! Oh...are any of you 350 Hydro folks coming over for the World Championship in Poland?????

[formulaseries]

Agree

I'm glad to be in the PRO Divison (currently racing in Europe). The rules are simple and the racing is GREAT!!! Oh...are any of you 350 Hydro folks coming over for the World Championship in Poland?????

I must admit, I got a bit lost... We have OSY400 and that is it...It's the engine you can buy off the shelf and go race.

Sure we have some older 202 and 102 engines, but these run in club races or are given to training boats for new starters.

[Brian10s]

I must admit, I got a bit lost... We have OSY400 and that is it...It's the engine you can buy off the shelf and go race.

Sure we have some older 202 and 102 engines, but these run in club races or are given to training boats for new starters.

This will be very general -
Over here, we have several Yamato classes, all bought "off the shelf" (well at least the 302 is still available, everything else was "off the shelf" at one time) - several classes in the Stock & Modified divisions and one in the Pro Division. In Pro, the class is called OSY400 and ultilizes the 102, 202 & 302 (I think the 80 is legal but do not know if it is used). In Stock, the class is called CSH and uses the 102 & 302. In Modified, they use the same motor types as the Stocks in CMH (102 & 302). Stock and Mod also still ultilizes the Yam 80 in a different class.

Differences: (very general)
Mods are allowed to "Modify" the engines (different towers, low water pickups and exhaust expansion chambers, etc). This will usually increase the top speed (by 5-8 mph sometimes more), therefore making the boat size be generally larger.

Stock and Pro use "roughly" the same size boats & engine specs but operate under different rule packages. The major differences are Stock have a height limit (inches the prop shaft must be below the bottom of the boat) and minimum weight (440lbs) where Pro does not have these "limitations".

In Stock, the "dominant" engine has been the 102 (a topic of much debate both before and after the latest rule changes regarding height) while in Pro, I believe the 202 is "dominant" but that is just a guess.

This is just a brief outline of the 3 Divisions and the classes - I am sure there are more differences and I am also sure I will be told how wrong I am what I listed. Hopefully it helped you out.

[Andrew 4CE]

Also Steve, I believe none of the Yamato based classes in North America are 'off the shelf' packages as they are over there... Motors in OSY here are not legal in OSY over there... not sure the reasoning, it's not my class, but all the gearboxes are modified here. AS I understand it anyway... I could be corrected.

[formulaseries]

We just buy the second hand Yamato OSY400 302 motor as run in the stadiums of Japan and put them on the boat to race. No mods allowed.

[Andrew 4CE]

That sounds like a great idea Steve...

We have I think 6 different classes for Yamato stadium motors...

[Kristi Ellison]

Peanut,

I hear you and we have no intention of messing with OSY, I agree with my fellow Commissioners on that one.

Dave Mason.....I certainly hope we as a Commission have some say over our catagory, as for the USTS they have not messed with us yet and I hope it stays that way.

Kristi

[ricochet112]

We just buy the second hand Yamato OSY400 302 motor as run in the stadiums of Japan and put them on the boat to race. No mods allowed.

The OSY400 class in APBA is more closely related to our CSH than a true OSY400 U.I.M. class. We allow for modifications on the lower unit, no weight limits and no (UIM) hull requirements.

The ONLY differences between OSY400 and CSH are a paddle is required in OSY, there's no minimum weight (in OSY for boat and or driver) and there's no height limitations in OSY. Other than that (I'm sure if I missed something I will be educated) it's almost exactly a CSH that we currently run in Stock Outboard in APBA.

I just went thru the UIM rules looking for any engine height limits. Are there limits on the engine height in OYS400 for UIM rules?
Is a kg equal to 2.2lbs? UIM rules require a heavy boat if my high school math is correct.

[formulaseries]

I just went thru the UIM rules looking for any engine height limits. Are there limits on the engine height in OYS400 for UIM rules?
Is a kg equal to 2.2lbs? UIM rules require a heavy boat if my high school math is correct.

No Engine height is free. can run as high or as deep as you like. Then you have to remember we run Jetty start, so to get a good start, does not help the engine to be high. The engine must be fixed.

1kg = 2.2lbs Yes. The old ruling was 100kg for boat and 70kg for driver. This ruling was to be reviewed at the World Championships in LOBMBC this year, as Sweden asked for an increase in weight. However I think it has been increased for 2007 to 100kg Boat 80kg Driver. Something I tend not to agree with, where your change a ruling for boat weights over the winter and for the rule to apply the following year. Currently people are having boats built for 2007 season, by the time the rules are published and the driver gets a copy of the U.I.M. rule book when he/she renews the licence and it is too late then. Rule changes for boats, for impact protection, deformable pickles, etc should be proposed one year, but not enforced until the following race season. E.G proposed 2006 - Comes into effect 2008.