tried to build a light weight tub... and failed :(

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I agree with Chris, One question would be then.... wouldnt prop and and pipe and everything established with the say 5 lb boat change if you say drop that boats weight by 2 lbs.... now everything needs to be done for the 3 lb boat. Hopefully though these changes wouldnt be that bad.
 
rodger, i couldn't agree with you more ;) ! nailing the start & staying on the bouys will do more than any weight reduction program, imho. i have used my .21 ob sundowner to beat a good running eagle sgx (tim jones) in a runoff by doing just that. he was easily faster than me, but couldn't get by me on the outside. i can't take all the credit, chris wittrig called an excellent race for me, prolly couldn't have done it without him. in the end, tim hit the turn 3 entrance bouy trying a last ditch inside move on lap 5. his boat is fast, finished either second or won the fall nats in a runoff. forget which, but he won that run off. no matter what your stuff weighs, driving skill is the biggest determining factor B) ........
 
rodger, i couldn't agree with you more ;) ! nailing the start & staying on the bouys will do more than any weight reduction program, imho. i have used my .21 ob sundowner to beat a good running eagle sgx (tim jones) in a runoff by doing just that. he was easily faster than me, but couldn't get by me on the outside. i can't take all the credit, chris wittrig called an excellent race for me, prolly couldn't have done it without him. in the end, tim hit the turn 3 entrance bouy trying a last ditch inside move on lap 5. his boat is fast, finished either second or won the fall nats in a runoff. forget which, but he won that run off. no matter what your stuff weighs, driving skill is the biggest determining factor B) ........
Yep! That's the way I feel. When my dad and I would go out testing boats he tested equipment I tested my driving ability. Of course he didn't like me getting so close to the buoys in practice... but even back then if I thought if I ran in close in practice it would be second nature for me in a race. We used to run these bouys that were styrofoam disk stacked together on PVC pipe. Found out that if you touched the buoy just right it would spin the bouy without upsetting the boat, leaving the buoy in tact. That was a fun game when I started to get bored. Object of the game. Spin all five buoys in a turn. Don't have time to practice near that much anymore. :(
 
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rodger, i couldn't agree with you more ;) ! nailing the start & staying on the bouys will do more than any weight reduction program, imho. i have used my .21 ob sundowner to beat a good running eagle sgx (tim jones) in a runoff by doing just that. he was easily faster than me, but couldn't get by me on the outside. i can't take all the credit, chris wittrig called an excellent race for me, prolly couldn't have done it without him. in the end, tim hit the turn 3 entrance bouy trying a last ditch inside move on lap 5. his boat is fast, finished either second or won the fall nats in a runoff. forget which, but he won that run off. no matter what your stuff weighs, driving skill is the biggest determining factor B) ........
Yep! That's the way I feel. When my dad and I would go out testing boats he tested equipment I tested my driving ability. Of course he didn't like me getting so close to the buoys in practice... but even back then if I thought if I ran in close in practice it would be second nature for me in a race. We used to run this bouys that were styrofoam disk held stack together on PVC pipe. Found out that if you touched the buoy just right it would spin the boat without upsetting the boat, leaving the buoy in tact. That was a fun game when I started to get bored. Object of the game. Spin all five buoys in a turn. Don't have time to practice near that much anymore. :(
Yay! I was the idiot that went to tap plastics to buy the styrofoam, make the hole in the middle, cut the disc shape on my bandsaw and spray paint the edges flourescent yellow/orange...

you were/are an awesome driver roger

=)
 
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Light weight accelerates faster..

If faster acceleration is what you want..

Kinetic energy goes down..

If you want lower kinetic energy.. Witch intern is connected to momentum!

It’s a balancing act

It will always be a balancing act!

That is my “7 sentences” for the week..

Grim

Face me to the course and tell me when to TURN!
 
rodger, i couldn't agree with you more ;) ! nailing the start & staying on the bouys will do more than any weight reduction program, imho. i have used my .21 ob sundowner to beat a good running eagle sgx (tim jones) in a runoff by doing just that. he was easily faster than me, but couldn't get by me on the outside. i can't take all the credit, chris wittrig called an excellent race for me, prolly couldn't have done it without him. in the end, tim hit the turn 3 entrance bouy trying a last ditch inside move on lap 5. his boat is fast, finished either second or won the fall nats in a runoff. forget which, but he won that run off. no matter what your stuff weighs, driving skill is the biggest determining factor B) ........
Yep! That's the way I feel. When my dad and I would go out testing boats he tested equipment I tested my driving ability. Of course he didn't like me getting so close to the buoys in practice... but even back then if I thought if I ran in close in practice it would be second nature for me in a race. We used to run this bouys that were styrofoam disk held stack together on PVC pipe. Found out that if you touched the buoy just right it would spin the boat without upsetting the boat, leaving the buoy in tact. That was a fun game when I started to get bored. Object of the game. Spin all five buoys in a turn. Don't have time to practice near that much anymore. :(
Yay! I was the idiot that went to tap plastics to buy the styrofoam, make the hole in the middle, cut the disc shape on my bandsaw and spray paint the edges flourescent yellow/orange...

you were/are an awesome driver roger

=)
Yah! Thanks Len. Draw back though is that the closer you get more often... the more often you hit them. Although my average may not be any greater than the anyone else, I've hit my share. Now I've learned you don't have to be that close. Just so long as every one else is on the outside. Protect the lane is what I always say.
 
Light weight accelerates faster..

If faster acceleration is what you want..

Kinetic energy goes down..

If you want lower kinetic energy.. Witch intern is connected to momentum!

It’s a balancing act

It will always be a balancing act!

That is my “7 sentences” for the week..

Grim

Face me to the course and tell me when to TURN!
Yah agree on that. I remember having a discussion with Steve O'Donnel about the subject of weight. If I recall our discussion correctly mentioned that the benefit really comes from relieving the load and stress on the engine when you change direction (ie. going through turns) and with that I see the connection to acceleration and even top speed. Just not sure how much of an edge it gives to a heat racing boat.
 
Light weight accelerates faster..

If faster acceleration is what you want..

Kinetic energy goes down..

If you want lower kinetic energy.. Witch intern is connected to momentum!

It’s a balancing act

It will always be a balancing act!

That is my “7 sentences” for the week..

Grim

Face me to the course and tell me when to TURN!
Yah agree on that. I remember having a discussion with Steve O'Donnel about the subject of weight. If I recall our discussion correctly mentioned that the benefit really comes from relieving the load and stress on the engine when you change direction (ie. going through turns) and with that I see the connection to acceleration and even top speed. Just not sure how much of an edge it gives to a heat racing boat.
I don't get to the pond as much as I would like to..... SO I need all the other edges I can get :) I don't think being a good driver diminishes the importance of a light boat. I'd rather be a good driver with a light boat than a good driver with a heavy boat.
 
Light weight accelerates faster..

If faster acceleration is what you want..

Kinetic energy goes down..

If you want lower kinetic energy.. Witch intern is connected to momentum!

Its a balancing act

It will always be a balancing act!

That is my 7 sentences for the week..

Grim

Face me to the course and tell me when to TURN!
Yah agree on that. I remember having a discussion with Steve O'Donnel about the subject of weight. If I recall our discussion correctly mentioned that the benefit really comes from relieving the load and stress on the engine when you change direction (ie. going through turns) and with that I see the connection to acceleration and even top speed. Just not sure how much of an edge it gives to a heat racing boat.
I don't get to the pond as much as I would like to..... SO I need all the other edges I can get :) I don't think being a good driver diminishes the importance of a light boat. I'd rather be a good driver with a light boat than a good driver with a heavy boat.
Yes it would be wise to get the edge wherever you can find it. : ) They all add up.
 
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Okay, but for the sake of conversation (purely for the fun of it of course)what about good driving, nailing the start, and hangin the bouys with a boat that weighs a 1/2 pound less than the others and is stable at speed in the straights and in the corners? I HAVE seen boats win races in lane 2 or 3 because they were simply faster....i have plenty of overbuilt boats(hogs! :lol: ) in my armada, but i do have a couple of lean hulls also and can see a big difference in performance...i WILL be the first to admit that i AM a pretty sorry excuse for a driver..at least most of the time! :rolleyes: :)Again just for the fun of good conversation..no big deal either way!
 
Okay, but for the sake of conversation (purely for the fun of it of course)what about good driving, nailing the start, and hangin the bouys with a boat that weighs a 1/2 pound less than the others and is stable at speed in the straights and in the corners? I HAVE seen boats win races in lane 2 or 3 because they were simply faster....i have plenty of overbuilt boats(hogs! :lol: ) in my armada, but i do have a couple of lean hulls also and can see a big difference in performance...i WILL be the first to admit that i AM a pretty sorry excuse for a driver..at least most of the time! :rolleyes: :)Again just for the fun of good conversation..no big deal either way!
Okay... simply for the sake of conversation...

I can say this has happened to me... When a boat simply powered around me.... in every case but one. I was running an OS Max and an older maybe even considered an outdated boat where as the guy passing me was running a Picco and the latest rig. In recent years I had it happen we both were running the same engine MAC .21 but he clearly had the better set-up (pipe, prop combo that day) and I clearly didn't.

In instances of all things being the same... Hull... Engine/Mods... Prop... Pipe and near the same driving skill I just can't see a lighter boat being 7 mph faster (what I heard somewhere that was typically needed) to pass on the outside in a heat race.
 
Okay, but for the sake of conversation (purely for the fun of it of course)what about good driving, nailing the start, and hangin the bouys with a boat that weighs a 1/2 pound less than the others and is stable at speed in the straights and in the corners? I HAVE seen boats win races in lane 2 or 3 because they were simply faster....i have plenty of overbuilt boats(hogs! :lol: ) in my armada, but i do have a couple of lean hulls also and can see a big difference in performance...i WILL be the first to admit that i AM a pretty sorry excuse for a driver..at least most of the time! :rolleyes: :)Again just for the fun of good conversation..no big deal either way!
Okay... simply for the sake of conversation...

I can say this has happened to me... When a boat simply powered around me.... in every case but one. I was running an OS Max and an older maybe even considered an outdated boat where as the guy passing me was running a Picco and the latest rig. In recent years I had it happen we both were running the same engine MAC .21 but he clearly had the better set-up (pipe, prop combo that day) and I clearly didn't.

In instances of all things being the same... Hull... Engine/Mods... Prop... Pipe and near the same driving skill I just can't see a lighter boat being 7 mph faster (what I heard somewhere that was typically needed) to pass on the outside in a heat race.
unless, of course you, throw a hunk of weight in one and not the other until you do acheive that much speed difference.

Maybe that is an experiment someone could try. Keep adding weight to your CG let's say until you acheive a noticeable difference in lap times that would make a passing difference in a race. I think everyone would be curious to know how much weight that would be.
 
In every instance the same object of area that is lighter WILL be faster... during acceleration...

At the speeds our boats run, the course they run on, the media they run in.. Lighter will be faster.

More weight (stored energy) will make it travel further... not faster. Read in cornering here.. we really don’t want our boats “traveling further” in the corners. Or having to “use up” the stored energy as the boat corners.

Put a 1” square steel nut on the end of a rubber band

Swing it around.. play with it.

and then an object the same size but of a lesser weight..

Grim
 
grim (& everyone else), i will never argue that lighter is better. i'm not sure what mph difference is needed to pass & CLEAR a boat in a straightaway, but i think i've heard 6 to 7 mph tossed around before. i think a LOT of weight would have to be lost or added to equal that many mph...... in the turns is where i think weight is prolly most important. an object in motion tends to stay in motion, making the heavier boat harder to get into the turn with. in heat racing, with the rougher water, hopping or sliding out in the turn would also be an issue. a heavier boat would prolly be set up looser, to help gain some speed, agravating the turning issues. a lighter boat could be set up tighter, to help hold it's line better. but getting lane 1 & keeping it is still the key, imho. unless you're kentley porter, then you can run in lane 10 & still lap the field :p :lol: :lol: !!
 
A liter boat is harder to set up. Small changes in set up will be more pronounced. Less weight less adjustment needed to do the same thing. For those of us just starting to learn set up of a boat it can be very aggravating. But when you hit the sweet spot it is a thing of beauty and makes it all worth the effort.

David
 
Grim,

For those of us up in the Twin Cities, you run 1)light boats, and 2) can drive. :) I'm happy you arent into riggers!! :)

Big Bryon, same story... that guy has perfected hitting the start, runs light boats, and drives lane 0. Unfortunately, he DOES run .12 riggers LOL (I'm always happy to seem him show up).

There are a number of others that can drive well and hold a tight course, even if there boat isnt the fastest. DRIVING wins generally speaking, from what I've seen. :)

Hope to see you guys again this summer. I'll be running last yrs "too heavy" boat, and still havin fun.
 
In every instance the same object of area that is lighter WILL be faster... during acceleration...

At the speeds our boats run, the course they run on, the media they run in.. Lighter will be faster.

More weight (stored energy) will make it travel further... not faster. Read in cornering here.. we really don’t want our boats “traveling further” in the corners. Or having to “use up” the stored energy as the boat corners.

Put a 1” square steel nut on the end of a rubber band

Swing it around.. play with it.

and then an object the same size but of a lesser weight..

Grim
Thanks... that's good info but I don't think anyone was debating that lighter wasn't faster... just questioning how much it actually would make a difference to heat racing.
 
For what it is worth....

My 1st 12. rigger (the green one posted in the JAP/JAE construction thread) weighed in at 2 1/4 lbs. I built a different, stronger boat last winter out of CF laminated to ply. 2nd rigger came in at 2 3/4lbs. I showed up at at the first couple races pointing out the extra weight and expecting to be uncompetitive. But by the end of the season, I was convinced it was no slower than the 1st, lighter boat - top speed seemed the same to my eyes. Cornering seemed the same too (I stay way off the bouys). And both boats have run consistently with the fastest boats in our club.
 
For what it is worth....

My 1st 12. rigger (the green one posted in the JAP/JAE construction thread) weighed in at 2 1/4 lbs. I built a different, stronger boat last winter out of CF laminated to ply. 2nd rigger came in at 2 3/4lbs. I showed up at at the first couple races pointing out the extra weight and expecting to be uncompetitive. But by the end of the season, I was convinced it was no slower than the 1st, lighter boat - top speed seemed the same to my eyes. Cornering seemed the same too (I stay way off the bouys). And both boats have run consistently with the fastest boats in our club.
Thanks Grim, Now I have three stiches in the corner of my eye from that suggestion.. :lol: For what it's worth - Todd. You came along way with that hull of yours, and I was very impressed by the end of the year.. Just quit running over the top of me after the race is over. :eek: Also, I understand what Grim is talking about, but not to under-estimate SOME advantages of a "Slightly Heavier" hull, can't be over looked.. Especially in heat racing. :)
 

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