BBY's 1/8 Pro Boat build

[Xfactor]

Hey I can view it on the little screamer thread . Randy that really a nice running eighth scale . My circus hull is 8lbs less motor and electrics .In your opinion Randy would the screamer be a decent choice for my boat if I wanna run between 55 and 65 mph in this boat. The prop I have in mind is an x 457. The nitro motor it would replace is a picco 67 that was balanced and bluprinted by a guy name Ken Stone In Oklahoma City. Its kinda funny cuz my picco has never been run and I want to convert the boat to electric. It seems that nitro motors are going to become obsolete;Oh well,we were probably killing the fish anyway.

[RandyatBBY]

Hey I can view it on the little screamer thread . Randy that really a nice running eighth scale . My circus hull is 8lbs less motor and electrics .In your opinion Randy would the screamer be a decent choice for my boat if I wanna run between 55 and 65 mph in this boat. The prop I have in mind is an x 457. The nitro motor it would replace is a picco 67 that was balanced and bluprinted by a guy name Ken Stone In Oklahoma City. Its kinda funny cuz my picco has never been run and I want to convert the boat to electric. It seems that nitro motors are going to become obsolete;Oh well,we were probably killing the fish anyway.

Thanks, It is just a start, there is more in it. I like my 1/8 scales to come in at about 16 lb, this boat is a tank weighs 20 lb. with out paint add 2 more pounds. I need to get to work to night, I will add more in the morning. I do like the motor. I think it has potential to do what you want. I have only ran three props with this motor. more tomorrow.

[Xfactor]

By the way Randy what's in the hydro in the speed run?If you dont mind me asking. In general no specifics.

[RandyatBBY]

By the way Randy what's in the hydro in the speed run?If you dont mind me asking. In general no specifics.

I have not put in a JPS yet but we think it is in the 55 56 MPH range with a 455 prop.

[Xfactor]

What other props have you tried Randy?

[RandyatBBY]

What other props have you tried Randy?

Was not able to run the boat this Sunday I had a lot of other boats to set up and with daylight savings a little short on time. I may get to run it in LA at the SAW's. Not sure if I will have the new motor on time or not .

[Xfactor]

Aww man.

[pmisuinas]

Have you had a chance to see it there is a better prop match, or are you still thinking a X455 is the way to go?

[RandyatBBY]

Have you had a chance to see it there is a better prop match, or are you still thinking a X455 is the way to go?

The 455 is just a starting point, the motor definably has more power to push other bigger props. I just have not been able to get to the pond since the SAW's. It sits there quietly waiting.

[pmisuinas]

Do you think it would be best to try a larger diameter prop first or maybe go up in pitch instead? maybe a 655? Am willing to experiment if I know what to experiment on--unfortunately I am completely new to FE (don't think my tug boat and scale boat experience is going to help much :-)). I have one of these motors I am going to put in an Aeromarine Sport X hull...

[RandyatBBY]

Do you think it would be best to try a larger diameter prop first or maybe go up in pitch instead? maybe a 655? Am willing to experiment if I know what to experiment on--unfortunately I am completely new to FE (don't think my tug boat and scale boat experience is going to help much :-)). I have one of these motors I am going to put in an Aeromarine Sport X hull...

Start with the 455 prop be safe is the boat is running wet may need to run a X450 to start off with and get the boat tuned before going up in prop.

[Xfactor]

do they even make a 655? I was thinking more along the lines of a 1400 series or 1600 series prop in the 50-60mm range.

[RandyatBBY]

do they even make a 655? I was thinking more along the lines of a 1400 series or 1600 series prop in the 50-60mm range.

To make the prop work you will need a low lifting prop. The problem I was having with the X460 was cavitation. What I was going to do is some prop work to stop the direction of flow out to the sides of the blade and make it travel in a pushing direction. Just going bigger does not help. More of a screw prop may help.

[Xfactor]

I guess I just dont get why all the fe guys insist on mono props on their hydro? all that strut angle introduces drag. I guess i dont understand using a prop with no lift then angling the strut 4-6 degress to get the butt out of the water. whats the purpose of hydro props then? To sit on the shelf?Someone please explain?

[RandyatBBY]

I guess I just dont get why all the fe guys insist on mono props on their hydro? all that strut angle introduces drag. I guess i dont understand using a prop with no lift then angling the strut 4-6 degress to get the butt out of the water. whats the purpose of hydro props then? To sit on the shelf?Someone please explain?

Well I am not talking about running a mono this is a Pro Boat build. Angling the strut with any boat will cause hop and lift. I had the problem of cavitation with any bigger prop than 455 with this low RPM motor. Sorry I do not have the time to write all the concepts nor the concentration. I have to get two boat layed up this after noon, I am leaving to look at a car for my son tomorrow in Seattle.