Did I loose 5 MPH?

[garystan]

Sucked in some gravel last two weeks ago but got it all out. Impeller and ring look like new, only 50 hours on my ski. I thought it was not at full speed but it tops out at 7500 RPM like it always did. So I raced my kid on his 95 XP and we were about tied. I timed his using my GPS before and it was at 50 MPR. Never timed mine but it was a little faster. It could have been the conditions or his was running a little better but I don't think so.
Mine sounds fine, no vibration and looks good inside the shoot.

 

[ken0276]

You may not loose the top speed, when your ski race with another ski in the race water, your top speed is slower than the normal by a few mph.

 

[KK40384]

You may not loose the top speed, when your ski race with another ski in the race water, your top speed is slower than the normal by a few mph.

Huh? That makes zero sense.

 

[ken0276]

Huh? That makes zero sense.

Oh, really? I have been racing RC gas powered model sport hydro for a long time, if no other boats racing with me, my boat would run 75 mph for the top speed on the straight way, but if it raced with other 4-5 boats in the race water, it only got about high 60 mph during the race, so can you tell me what made my boat loosed that 5-7 mph of top speed?
http://youtu.be/0CVww9E8Fgc

 

[Sportster-2001-951C-Stock]

Oh, really? I have been racing RC gas powered model sport hydro for a long time, if no other boats racing with me, my boat would run 75 mph for the top speed on the straight way, but if it raced with other 4-5 boats in the race water, it only got about high 60 mph during the race, so can you tell me what made my boat loosed that 5-7 mph of top speed?
http://youtu.be/0CVww9E8Fgc

Right, it's because surface tension is increased in inverse proportion to the square of the distance between the boat keels.

 

[Sportster-2001-951C-Stock]

Sucked in some gravel last two weeks ago but got it all out. Impeller and ring look like new, only 50 hours on my ski. I thought it was not at full speed but it tops out at 7500 RPM like it always did. So I raced my kid on his 95 XP and we were about tied. I timed his using my GPS before and it was at 50 MPR. Never timed mine but it was a little faster. It could have been the conditions or his was running a little better but I don't think so.
Mine sounds fine, no vibration and looks good inside the shoot.

It's b/c XP's are faster than Yamahaha's!