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[martno1fan]

How much oversize should this slot be then gents?

Also, do you glass the tub in further up the hull, or just rely on a clamp close to the collet and silicon by the transom?

Any pix would be of much help.

Thankee!

Phil

I made my slot as big again so i can move the strut up to raise the prop out of the water when needed to let it rev out more.Yes silicone at the transom and a clamp near the collet is all is needed,either a shop bought one or you can glass a plywood homw made one into the hull as i did,i drilled through it installed two stainless bolts into it then glassed it in and bent some ali plate to shape and that is bolted down using nyloc nuts and thats all that holds the tube,this way should you ever need your tube out its just a case of removing the nuts and it will pull out .The silicone is strong enough to hold it in place but it will come apart when you need it to  .

[AC RAZOR 45]

No prop walk on mine, and its in the middle!

I did read it but did not believe it, proof is in the running.

Running a strut now so have full adjustability

NO PROP WALK ON MINE AND THATS IN THE MIDDLE ON BOTH MY HULLS,....

[martno1fan]

Moderated awaiting advice.

Admin.

[AC RAZOR 45]

look at my you tube vid full speed left turn wrong again

[omra85]

Oooooooohh  Al - now you've done it   

 

[pete_486]

well ill bet mine is doing nigh on 60mph ive just changed the servo again and and altered my thrust setup and the last time i had it out it was turning left perfectly, NOT PROP WALKING.

Pete

[AC RAZOR 45]

Oooooooohh  Al - now you've done it   

 
[/quote

nice one danny have you seen my short vid im sure its turning left please let me know mate...al

[pete_486]

ill vouch for that Al i was there and saw it you had right trim on 

Pete

ps it's fast too

[AC RAZOR 45]

hereS the you tube link,short vid, full speed SHARP left turn mad makara handles perfect NO PROP WALK. we cant all be wrong, any way here it is...  http://www.youtube.com/watch?v=cnsSAgcORJU
................MAD MAKARA   AL

[2772e]

Mart,

The only reason mine would not turn left is because i put a smaller rudder servo in it and it was not man enough for the job.

When i put the bigger 1/4 scale back in it was fine.

Nothing to do with prop walk.

I think the general concensus is that Makara's don't suffer with it, something to be said for an old deep V boat!

 

[pete_486]

Al's turning left

http://uk.youtube.com/watch?v=cnsSAgc0RJU

[2772e]

I think that definately turned left?

Maybe though  :-\ the camera converted it to a negative and mirrored it.

What do you reckon, shall we ask xxxx?

[pete_486]

hi Simon i took that vid on my phone and honest there was no jiggerypokery 

Pete

[glennb2006]

Looked like a left turn to me. Got my boat to go left now, not as sharp as that mind but certainly sufficient. Right turns are tight. Might try to incorporate unequel rudder throw into the linkage to give more on left turns. Not really an issue mind. The strut and rudder adjustments made a load of difference, really is like a new boat, and that is without trim tabs.

And no prop walk now either on mine!! :)

Glenn

[AC RAZOR 45]

hi glenn glad to here your sorted,a good servo in mine now that made the differance,and there not alot of money either, about £27 with post, doing about 24.7kg at 6 volt through a y lead...alan

[glennb2006]

That's a monster servo Alan!!

I'm using, with success, Futaba S3305 @ 9Kg/cm. (at 6volts) Working OK for me. It is also a fast servo, .2 sec for 60 degrees.

I think the rudder positioning and shape plays a part in how much servo power is needed to turn the boat.

I also am running this servo in an FSRV boat just now with success, I will try one in my next boat too to see what happens, but as that is a 90 sized FSRV I think it might be a step too far for this servo. Time will tell though.

Glenn

[Stavros]

Hi Guys,

We've had notification of some unsafe / untested advice on this and other OMRA replated topics.

Please may we remind ALL Mayhemers that they must make it clear that any modifications or suggested changes offered are personal recommendations and not hard and fast fixes... unless of they have been tried and tested by yourself.

Along with with, if offering suggestions that may be difficult to "undo", please state clearly any possible consequences of recommend action.

Stavros - Topic Moderator.

[2772e]

If you are running digital sets, cant you increase the throw on the left hand rudder, say 120%?

I have to reduce mine to about 85% to stop it spinning out in the turns.

Not running trim tabs or a turn fin though.

[glennb2006]

Hi Guys,

We've had notification of some unsafe / untested advice on this and other OMRA replated topics.

Please may we remind ALL Mayhemers that they must make it clear that any modifications or suggested changes offered are personal recommendations and not hard and fast fixes... unless of they have been tried and tested by yourself.

Along with with, if offering suggestions that may be difficult to "undo", please state clearly any possible consequences of recommend action.

Stavros - Topic Moderator.

Thanks Stavros.

Will do.

Glenn

[glennb2006]

If you are running digital sets, cant you increase the throw on the left hand rudder, say 120%?

I have to reduce mine to about 85% to stop it spinning out in the turns.

Not running trim tabs or a turn fin though.

Hi Alan,

I could set throw differentiation on my radio, but I use two transmitters for my boats so would rather do it through the linkages and more mechanical means. Then I can use either TX with ease. (Truth be known, I can not be bothered to program the TX's up!!)


Glenn 

[AC RAZOR 45]

hi glenn i use a spektrum set one does all three boats,but it took me ages to be bothered to set it up properly,i used to have a differant set for each,but its lots easier now...al

[2772e]

I have a 6 channel futaba digital unit.

10 model memory

I have about 5 running on it at the moment, just switch and save.

Easy peasy

 

[glennb2006]

I have the other problem, I use tow TX's for my models, so they all have programs in each TX.

The reason for this is that I have an FSRV boat with trim tabs all over the place in it which are linked to the rudder and only one of my TX's will do this for me, so I end up with the situation I have.

Glenn

[AC RAZOR 45]

yes Glenn i had the same problem but with th spectrum and its different model memory it eliminates that problem...AL

[ids987]

That's a monster servo Alan!!

I'm using, with success, Futaba S3305 @ 9Kg/cm. (at 6volts) Working OK for me. It is also a fast servo, .2 sec for 60 degrees.

I think the rudder positioning and shape plays a part in how much servo power is needed to turn the boat.

I also am running this servo in an FSRV boat just now with success, I will try one in my next boat too to see what happens, but as that is a 90 sized FSRV I think it might be a step too far for this servo. Time will tell though.

Glenn

I've had a few S3305 servos. Right up to a CMB .90 powered Magnum. I also used one in a "B" (.67/11cc) class, and a couple of "A" (.45/7.5cc) boats, and didn't have any failures or servo problems with any of them. All of the above were submerged drive though, and all were stolen just over a year ago - so I don't know how they're working now !!

Ian