Nick:what is everyone have for a strut angel on a 45 shooter, I run about a one deg. negative and even with the bottom of the rear sponsers :unsure:
Thanks. Nick
Hi Marty,Nick:what is everyone have for a strut angel on a 45 shooter, I run about a one deg. negative and even with the bottom of the rear sponsers :unsure:
Thanks. Nick
GREAT TOPIC !!
Interesting things about strut angle and Why do you want strut angle?
Strut angle does a couple things. It allows for an easier launch (bigger pitch props). It also assists in acceleration out of the turns. Makes it easier for the engine to accelerate the boat. Why, because it allows the rear of the boat to jump up on the tips of the prop where the high pitch area is.
How much strut angle to use......
You want as much angle as possible WITHOUT the rear of the boat picking up a "High Frequency Hop". You will have to look very closely at the rear of the boat at full speed to see if you see ANY high frequency hop.
As an example, on my 20 boat I use 1.3 degrees of angle. That is the perfect angle to help launch and acceleration WITHOUT High Frequency Hop.
Is it the same for all boats...?? NO, it has to do with a lot of variables including strut weight, prop, CG, rear sponson attack angle and probably some more. Maybe dynamic cg too.
So, it is dependent on the specific boat and you can tune it at the pond by looking very closely during full speed pass down the front straightaway.
What kind of boat is it most important on? The more strut weight the more improtant. For example, a heavy tail weight (rear wing boat) 1/8 scale boat it is CRITICAL the angle on the strut. This will be thing that will keep the boat from dropping the rear of the boat in the turns and help it accelerate out of the turns. The heavier the strut weight, the higher the angle you will need on the strut.
Probably more than you wanted, but important enough to put in the archives of IW. This is a KEY COMPONENT of a great running boat of any kind.
What Marty says is definitely true and to expand on it a little further you can get to the point that too much negative strut angle starts to waste energy pushing the back of a boat up that would be better spent pushing it forward.Nick:what is everyone have for a strut angel on a 45 shooter, I run about a one deg. negative and even with the bottom of the rear sponsers :unsure:
Thanks. Nick
GREAT TOPIC !!
Interesting things about strut angle and Why do you want strut angle?
Strut angle does a couple things. It allows for an easier launch (bigger pitch props). It also assists in acceleration out of the turns. Makes it easier for the engine to accelerate the boat. Why, because it allows the rear of the boat to jump up on the tips of the prop where the high pitch area is.
How much strut angle to use......
You want as much angle as possible WITHOUT the rear of the boat picking up a "High Frequency Hop". You will have to look very closely at the rear of the boat at full speed to see if you see ANY high frequency hop.
As an example, on my 20 boat I use 1.3 degrees of angle. That is the perfect angle to help launch and acceleration WITHOUT High Frequency Hop.
Is it the same for all boats...?? NO, it has to do with a lot of variables including strut weight, prop, CG, rear sponson attack angle and probably some more. Maybe dynamic cg too.
So, it is dependent on the specific boat and you can tune it at the pond by looking very closely during full speed pass down the front straightaway.
What kind of boat is it most important on? The more strut weight the more improtant. For example, a heavy tail weight (rear wing boat) 1/8 scale boat it is CRITICAL the angle on the strut. This will be thing that will keep the boat from dropping the rear of the boat in the turns and help it accelerate out of the turns. The heavier the strut weight, the higher the angle you will need on the strut.
Probably more than you wanted, but important enough to put in the archives of IW. This is a KEY COMPONENT of a great running boat of any kind.
Nick:what is everyone have for a strut angel on a 45 shooter, I run about a one deg. negative and even with the bottom of the rear sponsers :unsure:
Thanks. Nick
GREAT TOPIC !!
Interesting things about strut angle and Why do you want strut angle?
Strut angle does a couple things. It allows for an easier launch (bigger pitch props). It also assists in acceleration out of the turns. Makes it easier for the engine to accelerate the boat. Why, because it allows the rear of the boat to jump up on the tips of the prop where the high pitch area is.
How much strut angle to use......
You want as much angle as possible WITHOUT the rear of the boat picking up a "High Frequency Hop". You will have to look very closely at the rear of the boat at full speed to see if you see ANY high frequency hop.
As an example, on my 20 boat I use 1.3 degrees of angle. That is the perfect angle to help launch and acceleration WITHOUT High Frequency Hop.
Is it the same for all boats...?? NO, it has to do with a lot of variables including strut weight, prop, CG, rear sponson attack angle and probably some more. Maybe dynamic cg too.
So, it is dependent on the specific boat and you can tune it at the pond by looking very closely during full speed pass down the front straightaway.
What kind of boat is it most important on? The more strut weight the more improtant. For example, a heavy tail weight (rear wing boat) 1/8 scale boat it is CRITICAL the angle on the strut. This will be thing that will keep the boat from dropping the rear of the boat in the turns and help it accelerate out of the turns. The heavier the strut weight, the higher the angle you will need on the strut.
Probably more than you wanted, but important enough to put in the archives of IW. This is a KEY COMPONENT of a great running boat of any kind.
Hahaha! Hey Marty, I think you had an itch that needed scratching. LOL. Actually, not enough information, because I'm very curious to what happens with my boat. I had a small battery pack and I changed to a 2500 5 cell 6 volt pack and that's when I noticed that my boat needed that extra degree on the strut. With the small pack, I was at 0 degrees and now I'm at 1. So definitely the weight needed that extra degree and I'm wondering if I should go even more and see where that takes me. My boat is very fast on straightaways... it has problems handling the turns, and I think I just found out what the problem was, thanks to a little angel that PMed me hahaha :lol: To tell me some of the sponson depth measurements, and even though my angles on the digital angle meter were right on the money, the depth on the right sponson was way the hell out of whack (by 1/4" :blink: ) What I did notice was exactly what you said... that my boat picked up speed on the turns, with the angle strut and also on pushing the 1462 full size with my pipe at 9" and it launches very easily and stays on the pipe at any RPM. So keep it coming with all your little secrets! It's never to late to learn.Nick:what is everyone have for a strut angel on a 45 shooter, I run about a one deg. negative and even with the bottom of the rear sponsers :unsure:
Thanks. Nick
GREAT TOPIC !!
Interesting things about strut angle and Why do you want strut angle?
Strut angle does a couple things. It allows for an easier launch (bigger pitch props). It also assists in acceleration out of the turns. Makes it easier for the engine to accelerate the boat. Why, because it allows the rear of the boat to jump up on the tips of the prop where the high pitch area is.
How much strut angle to use......
You want as much angle as possible WITHOUT the rear of the boat picking up a "High Frequency Hop". You will have to look very closely at the rear of the boat at full speed to see if you see ANY high frequency hop.
As an example, on my 20 boat I use 1.3 degrees of angle. That is the perfect angle to help launch and acceleration WITHOUT High Frequency Hop.
Is it the same for all boats...?? NO, it has to do with a lot of variables including strut weight, prop, CG, rear sponson attack angle and probably some more. Maybe dynamic cg too.
So, it is dependent on the specific boat and you can tune it at the pond by looking very closely during full speed pass down the front straightaway.
What kind of boat is it most important on? The more strut weight the more improtant. For example, a heavy tail weight (rear wing boat) 1/8 scale boat it is CRITICAL the angle on the strut. This will be thing that will keep the boat from dropping the rear of the boat in the turns and help it accelerate out of the turns. The heavier the strut weight, the higher the angle you will need on the strut.
Probably more than you wanted, but important enough to put in the archives of IW. This is a KEY COMPONENT of a great running boat of any kind.
table,digital smart tool, and /or "string"I'd like to hear how some of you guys are measuring your strut angles.
.100 degree? Or .1 degree? What tool do you use to measure .100 degree?
Right angle trig, shim height divided by strut length, then use the trig tables.I'd like to hear how some of you guys are measuring your strut angles.
table,digital smart tool, and /or "string"I'd like to hear how some of you guys are measuring your strut angles.
I was wondering who was gonna bring up the famous "string"table,digital smart tool, and /or "string"I'd like to hear how some of you guys are measuring your strut angles.
thats old school <_< it dose work but you need to know how dip it has to be according to the front sponsons some say 1/2" some say 3/8" others say 1/4 I think the smart digital meter is the ticket here B)I was wondering who was gonna bring up the famous "string"table,digital smart tool, and /or "string"I'd like to hear how some of you guys are measuring your strut angles.
I just had to asked because Steve said there was no typo. To write the extra zeros is Significant..100 degree? Or .1 degree? What tool do you use to measure .100 degree?
I agree that .1 degree is important. Isn't .1 degree the same as .100 degree?
Ray,Example: My 45 shooter strut is 1.815 L, divided by .033 shim up front gives me .0181818. According to Trig table I'm a tick over 1degree-2min.
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