100+ MPH

[gil sonsino]

Home sweet home! Let us know your progress with your twin and sure the Floridian's wheels will make a strange effect .

Gill

 

[aaron alberico]

hey tim

sg80+k90+2170prop=100mph+

when i ran over 100mph+ at the SAW trails i ran my 67oval boat, all i did was change the prop and take the turn fin off, and when you saw it go 97mph at the state title's i just changed the prop. but lets be relistic to oval race 100mph+ is to hard..... if you can race at 85mph+ you fast enough.

in Austrailia there's not more then 2 or 3 guy's running 85mph+ with there race boats. <_< <_<

 

[Blake Hedges]

Nitro will be back on top soon......in boats and r/c cars! 

I doubt it. I can't imagine what electrics will be capable of with Li-Poly cells.

I know it takes a lot more than just power, but having an advantage like LiPo is unheard of.

 

[AndyBrown]

I really like doubters!

They give me so much Inspiration.

 

[Blake Hedges]

I didn't mean it that way... :blink:

 

[rhomodel]

To get back to the original question, I think the 100 mile club is elusive, not that many boaters made it over 100, especially if you look at it percentage wise.

Think the biggest trick is not to be a motor magician but just patientce getting the proper set-up and spend a lot of time on the prop. I think more can be gained from the prop then from the engine.

Julius (still struggling to get over 70 with a gasser)

 

[AndyBrown]

Mostly just hull set up Julius. As I mentioned earlier. I ran 114 mph with stock MAC 84's and stock 2170"s in a twin. The same thing could be done with a stock engine and stock 2170 in a single if the hull is clean. Oh yea...........and Lots of Nitro!

 

[Tim_Duggan]

hey timsg80+k90+2170prop=100mph+

when i ran over 100mph+ at the SAW trails i ran my 67oval boat, all i did was change the prop and take the turn fin off, and when you saw it go 97mph at the state title's i just changed the prop. but lets be relistic to oval race 100mph+ is to hard..... if you can race at 85mph+ you fast enough.

in Austrailia there's not more then 2 or 3 guy's running 85mph+ with there race boats.  <_<   <_<

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Hey Aaron,

Yeah, that blew me away how easy it was for you to change the boat to run 97mph after oval racing it!

I have no intention of racing around corners at those speeds (but it would be interesting!!!!) - I'd just like to combine the stuff I already have and see what it can do in a straight line!

Tim.

 

[gil sonsino]

Julius

Look at this combo to not struggle too much!

SGX plus G 26MD plus Brown2170/cup 6.9 plus AB Parabolic pipe(stock size)= 74mph on heat race .

Gill

 

[aamick1971]

i got a question!!! now the 100 mph club i would like to be in some day,but doesnt fuel play a part in going fast! ok call me what you want i am just a 21 tunnel racer.now i know oil is power for some and bigger engines do better with lower percent of nitro like 40%(now i do run 60%in my .21 tunnel smaller motors like high nitro but also i run 20% oil in it)now take that 40%and lower the oil content to about 4% oil and add either more nitro or alchol to the mix to make the up the differance in the gallon.now add your best prop best set up to see what happens the rpm should come way up with less oil. after a run the motor might be junk but if you want to go fast you pay the price.now dont get me wrong i know there is more to it than just fuel,prop,and pipe(a really short pipe).the piston, sleeve,and crank could be cut. god i know my .21 k&b is cut to the gill. mybe one day i'll get something that i can play with too, mybe be apart of this club. this is just my take on this this subject,i could be wrong for saying all this but it is my opion.mybe i should stick to my tunnels and leave this along.

allen

 

[gil sonsino]

Hi Allen

You are correct mentioning the diverse factors that affect the top speed of a model and YES low % oil is required for saw races,high nitro % are a must, LOT of interior mods are also needed to get maximum output from these small engines,the right prop will take from you lot of time and investments BUT all this package won't work in a bad design or bad trimmed boat SO when you run for saw every littler minor detail will make a huge difference.

If you run tunnels make a comparision between your speed and the record boat in your class to see what can be done !

Thanks

Gill

 

[John Finch]

Boat setup to me is the key. When Kentley and I were going for the 100 mph mark we both spent a lot of time at the lake experimenting with EVERYTHING. Kentley had more time to test and the pond was closer to his house, so he made

most of the findings that worked. For example....rudder length. He found that when he reached the best rudder length: 1/4 inch shorter made the boat veer right, and 1/4 inch longer slowed the boat. After years of testing some things are standard on our 100 mph boats because of the testing he did way back then.

We used roadrunner sponsons on sg tubs and had trouble blowing off the water. We destroyed many boats because of blow-offs. Andy tried to tell us to use his sponsons, but we couldn't get the boats launched with his sponsons. Now, with the center sponson he devised, launching is not a problem. I am happy to say I use Andy's sponsons on Andy's tubs and have yet to blow a boat off the water at record trials going over 100 mph since making the change. His sponsons are no doubt the way to go if using "off the shelf sponsons".

Like Andy said.......some guys like to get there on their own and when they do, hopefully they have learned something. I will agree with Preston that going 100 mph is not as easy as it looks, but If you want to give it a shot, I think using the sgx will give you the best chance of getting there.

 

[AndyBrown]

Oh yea! I forgot Kently Porter... he is also a member of the "club".

Does that make 23 or 24 now.

All of my records were set with 70% nitro and 12% oil. We've run over 100 many time with 60%/15%.

I've junked a few Picco's trying to set records, but never a MAC.

 

[TomMoorehouse]

  I really like doubters!
They give me so much Inspiration. 

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Andy... there is no way you could make 150, the electric guys will beat you there!

 

[gil sonsino]

rudder lenght.......fin or not fin,12-15% oil,60-70% nitro ,sgx-roadrunner ....man it is a long list for sure .

you can't always get what you want but if you try sometimes you just might find you get what you need . B)

Gill

 

[AndyBrown]

Love them Rollingstones Gil. B)

Tom, keep it coming...just love that inspiration

 

[jayt]

I do not doubt that both electric and nitro could eventually reach 150 mph, but where will it happen? At about 2200 feet long, Legg Lake is really too short to do it safely - Joreg's 143 mph top speed was reached just past the mid-point of the lake. Acceleration/deceleration ability is the limiting factor right now - I suspect that given a glass-smooth mile-long lake both electric and liquid-fuel models could reach 150. Electric is about there right now with power and design, but finding a venue which will permit these speeds will be the problem....IMO anyway after watching the electric 133 mph pass and several 118+ mph nitro passes. B)

 

[AndyBrown]

Which is it? 133 or 143 ?

 

[scott bouchie]

143 was on radar out the back door

 

[Ron Olson]

Agreed. After seeing the video of Jeorge's run you can see that Legg Lake is way too small for the speeds that they're hitting. We don't even consider that a lake up here. Jeorge needed a lot more room to get it up to speed. If he had that room, the record could have been MUCH higher. Thread Lake has the room but there aren't that many people showing up to give it a shot. You could almost get a boat out of radio range there or futher away than I like to get my boats. From what I've seen of Huntsville, you have that ski jump ramp at the left end that scares some people.