Turn Fins on Monos

[Marty Davis]

Has anyone had any experience with turn fins on monos?

John Finch, your response would be appreciated here.

 

[ED MAZZOLA]

Has anyone had any experience with turn fins on monos?

John Finch, your response would be appreciated here.

JOHN I RUN TURN FINS ON MY AC AN IT RUNS GREAT. RAN FOR PAST 3 YEARS WITH THEM

ED

 

[Marty Davis]

Has anyone had any experience with turn fins on monos?

John Finch, your response would be appreciated here.

JOHN I RUN TURN FINS ON MY AC AN IT RUNS GREAT. RAN FOR PAST 3 YEARS WITH THEM

ED

More interested in turn fins forward on the boat and not on the transom.

 

[Joe Warren]

Marty years ago we ran many different blade profiles. Many of todays boat have some hook to help assist in turning. The older boats needed help. Some of the best blades progressively got wider the deeper they reached into the water. if you put this profile on a Seaducer today it would just about rip the transom out of it.... Some mono`s need more help than other to turn. Running a Longer bracket on the rudder also helped the boats that did Not want to turn..... Also sometimes the difference is how high the different boats carried there Center Of Gravity or Engine thru the corners. A high mounted engine can help the boat lay over. it has a higher COG & when it lays over to turn the engine is out of the center line more...... I will see if I can find a pattern of the fin if you need it. I got the pattern from Bill`s & his old Mono days. a lot of this is in John Finch`s old Advanced R/C Model Boating Booklet under Mono Theory....... a lot can be learned out of that ole book.......Hope this helps....jw

 

[P THOMAS]

Has anyone had any experience with turn fins on monos?

John Finch, your response would be appreciated here.

Monos of today would not need a keel turn fin. Proper balance and hull vee will get a real good turning boat now days.

Some of the first mono vee hulls had them cause of the lower angle vees. Prather monos had turn fins and all of the older flat bottom monos needed fins to pivot on. The dumas sk daddle boats had them. Balance and position were the challenge to get right on those monos. I saw some of mine run down the straight and switch ends a couple times and keep going the same direction :lol:

 

[RaceCraftBearings]

Phil I have seen YOU swap ends :blink:

 

[Marty Davis]

Can any of the .21 monos run full throttle through the turns without losing a lot of speed and be super stable.?

 

[NOVALTD]

Can any of the .21 monos run full throttle through the turns without losing a lot of speed and be super stable.?

YES Marty you can take 21 mono (seaducer 33in) and turn wide open and never lift, I have done it. You will have to

change the setup on the boat. You don't need a turn fin . Adding a turn fin is another way of doing it.

Happy testing - Dan McCormick

 

[P THOMAS]

Can any of the .21 monos run full throttle through the turns without losing a lot of speed and be super stable.?

YES Marty you can take 21 mono (seaducer 33in) and turn wide open and never lift, I have done it. You will have to

change the setup on the boat. You don't need a turn fin . Adding a turn fin is another way of doing it.

Happy testing - Dan McCormick

IM happy with my 21 Speedmaster turning. When racing it is wise to control the speeds in traffic but on its own it will turn full throttle. I need to watch the video some more to make it till spring.

http://www.intlwaters.com/index.php?showtopic=43002&st=0&p=385790&fromsearch=1entry385790

 

[Joe Warren]

Years ago I seen Ron run some turn fins on Mono`s with hook in them...... I believe the Seaducer hulls are the most impressive & superior in the corners & the speed they hold. The difference in Mono is the Motors & Props & Pipes Just like the Hydro classes. I will say I have learned the Flywheel-Crankshaft weight is a good thing thru the corners... & There is No End to the Mods you can make to a X series prop to better it........ If you run it out of the bag S/B with no mods? there is a Lot of Mods that will improve X series prop performance.

 

[Marty Davis]

Years ago I seen Ron run some turn fins on Mono`s with hook in them...... I believe the Seaducer hulls are the most impressive & superior in the corners & the speed they hold. The difference in Mono is the Motors & Props & Pipes Just like the Hydro classes. I will say I have learned the Flywheel-Crankshaft weight is a good thing thru the corners... & There is No End to the Mods you can make to a X series prop to better it........ If you run it out of the bag S/B with no mods? there is a Lot of Mods that will improve X series prop performance.

Joe:

I agree about the X Series Props.

Do you know how much a typical 20 mono leans in the turns when it is set up perfectly? Guess on degree of lean?

Many years ago I saw Ed Hughey do some turn fin work on an electric mono that I want to re-visit.

IF I could get a mono to turn like my hydros, that would be very good!!

 

[Ronald Van Wagnen]

IF I could get a mono to turn like my hydros, that would be very good!!

Marty,

You probably can but the hull would be called a catamaran !!

Good luck

 

[Joe Warren]

Years ago I seen Ron run some turn fins on Mono`s with hook in them...... I believe the Seaducer hulls are the most impressive & superior in the corners & the speed they hold. The difference in Mono is the Motors & Props & Pipes Just like the Hydro classes. I will say I have learned the Flywheel-Crankshaft weight is a good thing thru the corners... & There is No End to the Mods you can make to a X series prop to better it........ If you run it out of the bag S/B with no mods? there is a Lot of Mods that will improve X series prop performance.

Joe:

I agree about the X Series Props.

Do you know how much a typical 20 mono leans in the turns when it is set up perfectly? Guess on degree of lean?

Many years ago I saw Ed Hughey do some turn fin work on an electric mono that I want to re-visit.

IF I could get a mono to turn like my hydros, that would be very good!!

You already know who I learned my Mono Stuff From. & He proved to me, The boat must lay over to turn. You fill in the hook in a Seaducer & you have killed its ability to corner. It needs hook to wet up the right side to turn. With your vast knowledge of X series props with a Good Seaducer hull & a great engine pipe combo you will be the class of whatever field you run in...... Many Do not experiment with the props & pipes enough. Me personally a 3280 pipe @ 3 1/4 to 3 1/2 long on a Good NovaRossi .21 is Going to be extremely hard to out run. if the guy knows his props It going to be even harder. When I go to the lake with a New mono I tune it jut like a hydro, Keep taking away pipe length until it sags. & then give back 1/4. Decrease the head clearence as much as the engine will allow, Run as Much Cup as the engine will pull & stay within the needle. I tune the fuel with the element (wire) color in the plug. I tune the load of the engine with the color of outer ring of the plug........ By then you will Be... Hauling ass!!!!! But you already know this...... B)

 

[Marty Davis]

IF I could get a mono to turn like my hydros, that would be very good!!

Marty,

You probably can but the hull would be called a catamaran !!

Good luck

Where have you been? I remember that you know a LOT about catamaran's.

Maybe I can figure it out....

 

[Marty Davis]

Years ago I seen Ron run some turn fins on Mono`s with hook in them...... I believe the Seaducer hulls are the most impressive & superior in the corners & the speed they hold. The difference in Mono is the Motors & Props & Pipes Just like the Hydro classes. I will say I have learned the Flywheel-Crankshaft weight is a good thing thru the corners... & There is No End to the Mods you can make to a X series prop to better it........ If you run it out of the bag S/B with no mods? there is a Lot of Mods that will improve X series prop performance.

Joe:

I agree about the X Series Props.

Do you know how much a typical 20 mono leans in the turns when it is set up perfectly? Guess on degree of lean?

Many years ago I saw Ed Hughey do some turn fin work on an electric mono that I want to re-visit.

IF I could get a mono to turn like my hydros, that would be very good!!

You already know who I learned my Mono Stuff From. & He proved to me, The boat must lay over to turn. You fill in the hook in a Seaducer & you have killed its ability to corner. It needs hook to wet up the right side to turn. With your vast knowledge of X series props with a Good Seaducer hull & a great engine pipe combo you will be the class of whatever field you run in...... Many Do not experiment with the props & pipes enough. Me personally a 3280 pipe @ 3 1/4 to 3 1/2 long on a Good NovaRossi .21 is Going to be extremely hard to out run. if the guy knows his props It going to be even harder. When I go to the lake with a New mono I tune it jut like a hydro, Keep taking away pipe length until it sags. & then give back 1/4. Decrease the head clearence as much as the engine will allow, Run as Much Cup as the engine will pull & stay within the needle. I tune the fuel with the element (wire) color in the plug. I tune the load of the engine with the color of outer ring of the plug........ By then you will Be... Hauling ass!!!!! But you already know this...... B)

ALL GOOD super tips for everyone. I agree with all of the tuning tips and suggest that people read and re-read your post.

I might vary a little, since I use mixture control on everything. A perfect needle is always available. Also, not sure I agree with you on X Props being best on monos. Much too lmited by low entry pitch.

 

[Terry Keeley]

If you run 4 tabs you can use the outter right to adjust the attitude in the corners.

I'm with Phil, my little SP20 will turn full bore but in the marbles of a heat it's better to plant it with a little throttle (just like our hydros years ago).

I've tried a small fin out on the RHS when I saw David Preusse running one years ago, seemed to work but adjusting the attitude with a tab is more precise.

I think it lays right over in the turn until the bottom RHS is flat on the water...

 

[Andy Greene]

Marty on the subject of props, there is a three blade chopper that Otto and Bill B where running on there 20 mono's that was the cats meow. Sorry I cant remember exactly what it was ,but Im sure someone here does. Never tried one on a Seaducer but would be worth a test if you want something other than an x-series.

Looking forward to seeing you at the pond again.

Andy

 

[Marty Davis]

If you run 4 tabs you can use the outter right to adjust the attitude in the corners.

I'm with Phil, my little SP20 will turn full bore but in the marbles of a heat it's better to plant it with a little throttle (just like our hydros years ago).

I've tried a small fin out on the RHS when I saw David Preusse running one years ago, seemed to work but adjusting the attitude with a tab is more precise.

I think it lays right over in the turn until the bottom RHS is flat on the water...

INTERESTING on the flat on the right bottom..... If this is so, what is the angle of the bottom in relation to the keel and what angle would the boat change on a Seaducer in the turn? Don't we know the angle of the bottom on a Seaducer in relation to the keel?

Have you seen Dick Tyndal's rudder setup on his 20 mono?

 

[Joe Warren]

Years ago I seen Ron run some turn fins on Mono`s with hook in them...... I believe the Seaducer hulls are the most impressive & superior in the corners & the speed they hold. The difference in Mono is the Motors & Props & Pipes Just like the Hydro classes. I will say I have learned the Flywheel-Crankshaft weight is a good thing thru the corners... & There is No End to the Mods you can make to a X series prop to better it........ If you run it out of the bag S/B with no mods? there is a Lot of Mods that will improve X series prop performance.

Joe:

I agree about the X Series Props.

Do you know how much a typical 20 mono leans in the turns when it is set up perfectly? Guess on degree of lean?

Many years ago I saw Ed Hughey do some turn fin work on an electric mono that I want to re-visit.

IF I could get a mono to turn like my hydros, that would be very good!!

You already know who I learned my Mono Stuff From. & He proved to me, The boat must lay over to turn. You fill in the hook in a Seaducer & you have killed its ability to corner. It needs hook to wet up the right side to turn. With your vast knowledge of X series props with a Good Seaducer hull & a great engine pipe combo you will be the class of whatever field you run in...... Many Do not experiment with the props & pipes enough. Me personally a 3280 pipe @ 3 1/4 to 3 1/2 long on a Good NovaRossi .21 is Going to be extremely hard to out run. if the guy knows his props It going to be even harder. When I go to the lake with a New mono I tune it jut like a hydro, Keep taking away pipe length until it sags. & then give back 1/4. Decrease the head clearence as much as the engine will allow, Run as Much Cup as the engine will pull & stay within the needle. I tune the fuel with the element (wire) color in the plug. I tune the load of the engine with the color of outer ring of the plug........ By then you will Be... Hauling ass!!!!! But you already know this...... B)

ALL GOOD super tips for everyone. I agree with all of the tuning tips and suggest that people read and re-read your post.

I might vary a little, since I use mixture control on everything. A perfect needle is always available. Also, not sure I agree with you on X Props being best on monos. Much too lmited by low entry pitch.

True on the entry pitch & it must come off. I can tell how much load (cup) I have added to the prop each adjustment by 1st seeing hom much more fuel the engine now needs to run. I contuine to be aware of what number the third channel must be adjusted to now be on a slight rich needle. A day @ the lake with one boat & you can pick up the performance every time & must have a good set of prop pliers too! p.s the 101`s in the Twin with 7.0 cup 67mm prop`s will not even color the plugs or wire. I dont know that a 1667 will be efficient @ 7.2-7.5 T.E with a COB @ 4.0 4.5 ???? it will be twisted up...... :blink:

 

[john v]

Marty on the subject of props, there is a three blade chopper that Otto and Bill B where running on there 20 mono's that was the cats meow. Sorry I cant remember exactly what it was ,but Im sure someone here does. Never tried one on a Seaducer but would be worth a test if you want something other than an x-series.

Looking forward to seeing you at the pond again.

Andy

mark shoulund sent me a 3 blade chopper for my 21 ducer and it runs well, different strut, pipe setup but i think it runs better than the 440/3