just a poll

[Tom Kelly]

Do you think the one vote for the .80 size engine in scale is just to stir the pot?

 

[larcor69]

Who know's, but it sure has made some good reading..lol when we gunna have a club meeting or a fun run at the tech center, would like to try my new/old picco in that atlas its so hard to find a place around here to just throw in a gas boat

 

[SayMikey]

Who know's, but it sure has made some good reading..lol when we gunna have a club meeting or a fun run at the tech center, would like to try my new/old picco in that atlas its so hard to find a place around here to just throw in a gas boat

Im sure it is,we do have a few that love to stir and poke....... Everyone knows that the powerplant is only a small portion of the whole scale race. Proper setup will gain you much more than a boat that runs 70 mph and has to stop to turn. Gains in turn speed in all the classes have done more than raw speed. Thank you Dick Tyndall for all the nice hooks to set the turn up..........

 

[larcor69]

Your right Mike, I have just been board, we where suppose to be camping this week, but My wife has been sick and was in the Hospital sunday and monday, been here in the bed room to be with her, and so forth on the puter alot, so I though I would get a little action on the IW site I really though the best thread came from Mike Kelly, he thought I was talking about him...LOL wasnt anybody, really, I will hopefully have a really fast good turning scale soon, then who know's maybe someday someone will think the same about me!! :lol:

 

[DON MAHER]

This thread is just like " fishing stories," you know "the one that got away" ( a 75mph heat race scale & 7.5--8.0 hp) Good thing I got hip-waders :lol:

Don

 

[SayMikey]

This thread is just like " fishing stories," you know "the one that got away" ( a 75mph heat race scale & 7.5--8.0 hp) Good thing I got hip-waders :lol:
Don

OK guys take aim> Im here to tell you a 67 CMB greeny has all the horses any scale could need. Ive had some nice Orlic Piccos and a stock greeny is better than any mod picco. So come on over to the GREEN side besides you wont need anything but bearings for years, pinch when needed and hold on. ALRIGHT i said it come get me ..........................

 

[Greg Hahn]

This thread is just like " fishing stories," you know "the one that got away" ( a 75mph heat race scale & 7.5--8.0 hp) Good thing I got hip-waders :lol:
Don

OK guys take aim> Im here to tell you a 67 CMB greeny has all the horses any scale could need. Ive had some nice Orlic Piccos and a stock greeny is better than any mod picco. So come on over to the GREEN side besides you wont need anything but bearings for years, pinch when needed and hold on. ALRIGHT i said it come get me ..........................

I second that emotion

 

[Don Ferrette]

This thread is just like " fishing stories," you know "the one that got away" ( a 75mph heat race scale & 7.5--8.0 hp) Good thing I got hip-waders :lol:
Don

Amen to that.

 

[Tall Fella]

Hello from Australia .

Firstly , I would like to say that that it is not my intention to hijack this topic . Regarding the OPS motors , there have been many used over here in Australia in many different hull configurations including 1 / 8 Scale . One of our previous members - now gone into drag racing has made using a CNC programme a billet bearing housing for the OPS 67 motor to enable 2 large bearings to be installed instead of the factory casting which uses 1 . There is another member of my club that is getting some made to be used in his motors , mainly for Scale boats . So between us there will be at least 7 of these made . If there is any interest in getting some of these , send me a private message . And when it comes to 1 / 8 Scale , I only run a 67 size motor .

Regards

Ian Baas

Tall Fella Racing

Australia

 

[DON MAHER]

This thread is just like " fishing stories," you know "the one that got away" ( a 75mph heat race scale & 7.5--8.0 hp) Good thing I got hip-waders :lol:
Don

OK guys take aim> Im here to tell you a 67 CMB greeny has all the horses any scale could need. Ive had some nice Orlic Piccos and a stock greeny is better than any mod picco. So come on over to the GREEN side besides you wont need anything but bearings for years, pinch when needed and hold on. ALRIGHT i said it come get me ..........................

Mikey,

Let's give'm some more to aim at!!!! I am with you, a stock 67 greenie will out last any picco 67 by a very looooong time & with a small amount of work will out run just about anything!!!! OK RAISE THE SHIELDS SCOTTY :lol:

Don

 

[Bigbird]

This thread is just like " fishing stories," you know "the one that got away" ( a 75mph heat race scale & 7.5--8.0 hp) Good thing I got hip-waders :lol:
Don

OK guys take aim> Im here to tell you a 67 CMB greeny has all the horses any scale could need. Ive had some nice Orlic Piccos and a stock greeny is better than any mod picco. So come on over to the GREEN side besides you wont need anything but bearings for years, pinch when needed and hold on. ALRIGHT i said it come get me ..........................

It may just be my bad memory, but I can recall a pink boat with an ops67 kicking some greeny butt this year.

BB

 

[PakMan]

do you use a .80 in your scale boat knowing there's no way to tell if it's a .67 without a tear down??

Pertaining to the initial question in this post. Does anyone have a Graph plot of record time, or record speed as it relates to displacement?? IE, as the cubic cm, or c.i. increase, is there a point at which top speed, and thus top times drop off....?? I think it looks like a bell curve (flatter during the last 20 years, I'll concede, but still curved) ...Just a thought... Mine is that it is almost exactly at the displacement of .67....(both top speed, and top time drop-off) :huh: I know there could be a minority of exceptions to the rule, but they are likely by expert modelers...that could make a .67 go just as fast, if not faster! If you want to go fast with a scale, I think the majority of the FACTS will point toward .67 displacement.

Why do you think the NAMBA X-hydro record is held by a .69??.... I think.... and BTW, what major mfr makes a .69??? Think about it. Bring on the .80+ displacement, and If you want to know why the displacement for 1/8 scales is .67 in Namba/the Northwest, let's start a thread on that one too. I can regurgitate history and the reason... it wasn't because of single motors larger than .67. That's a hint.... let me know if you want to know more...

Just my observations.... and BTW, bring that (above .67 boat to the NWSHC this fall, I want to run against it... , ... heck, bring all those 70+ boats too.. come to think of it, bring em' all!!)

Bill want's to show ALL of us how it's done... If he can drive a straight.... straight-away.... OK, now I've gone too far... sorry Bill, just tryin' to help Marty and Al. For the record, I backed into the win last year, just did as the DR. ordered... cause no harm, and apply maximum pressure, (as interpreted by the officials)!!!

Sincerely,

David Jensen

PakMan

P.S. - The second hint is that the displacement rule was put into place in about 1978.... in NAMBA/RCU/District 8...

 

[Grub]

Why use an 80 when they do this;

Ouch

 

[Grub]

80 or 67?



Mr Tyndall makes nice turn fins.

 

[DON MAHER]

David,

The .69ci you are refering to was custom built by Mark Grim for our Henry Velasco scale hull, that we set all 3 records with at that SAW. (scale, sport-60 & sport-x) The ,69 motor had never been run prior to our attempt at the sport-x record. The boating gods smiled upon us just enough to get the record! We could not keep that damm thing running all the way through the traps, the motor would just quit about 80-90ft befor the exit light & then just coast through. The best one way pass was 82mph coasting through!!!!

Grub,

That is a good running scale, But I have to question the fact that it ran only 5 laps & was the only boat on the course. A time of 1.08 is very fast on any course. My question is how long is your 5 lap course, is it 1mi.? and if it is, why only 5 laps??? <_<

Don

 

[Grub]

Don, our races are five laps of 300m course which is 1.5kms, when we were in the states we did 6 laps of a 266m course which equals one mile.

So we can set our boats up for a bit more top end speed because our course is not so much longer in the straights but the turns have a bigger radius meaning that you don't lose as much speed around the turns

Running at the NAMBA Nats took a little getting used to because everyone has to drive their boat around the course, especially in 06 in Florida, with the course having tight turns and being so close to the bank on the exit of the right hand turn.

Learnt so much from you guys, after the three trips I've had to the US and I have got the photos and the advice and I am now reaping the benefits.

BTW Will never forget running against Henry at the 04 Nats when he set the heat record in scale. He flew past me that day and ever since then have been wanting a boat to go that fast. It was a shame that he destroyed the boat in the next heat from radio problems. Then again what about the scale final that year!

 

[DON MAHER]

thin

Don, our races are five laps of 300m course which is 1.5kms, when we were in the states we did 6 laps of a 266m course which equals one mile.
So we can set our boats up for a bit more top end speed because our course is not so much longer in the straights but the turns have a bigger radius meaning that you don't lose as much speed around the turns

Grub, A'm I correct in thinking that you are running on a course that is about 200ft. longer total distance & some 12-13sec. faster than our scale record?????? If this is the case, your scale boats are the fastest on the planet

Don

 

[Grub]

Don, get your maths into gear mate :lol: , 1.6kms to the mile means we have a race that is 100m shorter over here. Thats why the times are quicker. the course is bigger so we do one less lap and we get 2 less turns per race, so you can set your boat up for more straight line speed plus you have less acceleration needed with larger turns. Hence we can swing bigger props as well.

The MAC I had in the Miss U.S. is an absolute rocket built by Wideboy, but the boat is now wrecked. Ask any of the Aussie guys about it, they'll tell you that this boat put a lap easily on other boats at the Gold and Silver Cups over the years.

Once the little one grows up and I build the new valesco scale and finish the new twin we will come over again and have a run at the Nats. Need to get myself some more blue ribbons to add to the six I've got already.

On the other hand you guys should come over here, the Nationals are in May next year in Sydney again. Nice cooler temps during that time of year and great facilities.

Funny thing about this is that it doesn't matter if you run an 80 or not, there is a 10s electric scale out here that is "the one" to catch in a straight line.

 

[Al Waters]

thin

Don, our races are five laps of 300m course which is 1.5kms, when we were in the states we did 6 laps of a 266m course which equals one mile.
So we can set our boats up for a bit more top end speed because our course is not so much longer in the straights but the turns have a bigger radius meaning that you don't lose as much speed around the turns

Grub, A'm I correct in thinking that you are running on a course that is about 200ft. longer total distance & some 12-13sec. faster than our scale record?????? If this is the case, your scale boats are the fastest on the planet

Don

Well Don, I think that I will jump in here now. Mark Grim beat me in qualifying in scale (I held him off for four laps) and in the final (I took second) at the NAMBA Nats in Colorado this year and that was with my box stock CMB Green Head (and exhaust throttle). Now he didn't beat me as bad as he usually does and I will tell you why. He balanced and sharpened a prop for me the morning of the scale final. I wonder if he was holding back a little on my prop.

So I guess set up does mean a lot.

See ya, Al Waters

PS.. I have three 65 pistons and sleeves for the old pre EXR Piccos. I had them cut down a few years back and they fit in the old Picco 80 case. You know me, I saved everything. I know that I wouldn't have a chance at Legg Lake but maybe San Diego.

 

[DON MAHER]

Don, get your maths into gear mate :lol: , 1.6kms to the mile means we have a race that is 100m shorter over here. Thats why the times are quicker. the course is bigger so we do one less lap and we get 2 less turns per race, so you can set your boat up for more straight line speed plus you have less acceleration needed with larger turns. Hence we can swing bigger props as well
Grub, Wow I sure had a brain fart on the math!!!!! :blink: Now I see the light... Some day I hope to get over there & see some of that part of the world. A little boating racing would be in order also.

Don