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I have a marker bouy that my boat seems to like.It is the far one in this vid of the Fightercat today http://www.youtube.com/watch?v=HfnI6...=youtube_gdata
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Need help - 40" cig boat
Hey guys,
We maidened the 40" cig boat yesterday, but still requires adjustment. I was having some difficulties with my FE tx - a flysky.
This short video shows how it runs using a 45mm prop - seems it just likes to cavitate. It runs wet - maybe due to lack of speed.
When we got the boat back, we elevated the trim tabs and I got to borrow a 50mm prop to test. A small amount of improvement, but still not satisfied.
TX aside, everything else is bnew - new boat (obviously), new T180esc, new T600 motor, new 2 x 3s 5200mah 40c batts.
Running hardware came from 42" Osprey.
I dont know any timing settings for the T600 - so we kept the T180a esc setting at default which is 15degrees timing and low voltage cutoff is at 3.2v
I read that Turnigy ESCs cutout power early - which we noticed in our 2nd run. I also know that bnew batteries arent optimized yet during first few runs.
I just cant figure out what I did wrong - nothing much difference in setting my previous FE boats .........so
40" hull isnt that much heavier as I had it layed up thin, but firm. Did I get a dud along the electronics chain? Dunno.
Any observations you guys can contribute from looking at both videos would be appreciated!Comment
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Timing should be 25-30 degrees on a outrunner.Comment
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Thank you for that info Shawn!
Is that general knowledge around the forum and I just missed it or something you knew from experience?
Just asking 'coz I've run smaller outrunners in the past and just kept with the default 15degrees setting- they always seem to run just fine.
The highest setting in the turnigy esc is 26.25 degrees - should I keep it at that?
I read somewhere thou that higher timing means also higher motor temps? any info on this?
Althou at default 15degrees of timing yesterday, we did notice that the outrunner is a bit hot - while the esc and batts is just the normal warm to the touch.Comment
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I think I mentioned it to you when you were just starting out that outrunner has higher timing since they are high pole motors unlike inrunners that are low pole motors. Maybe you just had senior moments brother!
I'm guessing you ran raw prop as you always do? That may also affected the performance!
My Aquacraft SV27's old Video: http://www.youtube.com/watch?v=VoTm4Btz41Q
MHZ Micro Iceberg, Skunksworks Gen2 Cat twin, Aquacraft SV27, SM29 1515 sold.Comment
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I'll scratch around at Fightercat.There are alot more outrunner guys over there Mac.I would think the 26.5 would be fine,or even a little lower to start.Too low will raise temps too.And this is just my read knowledge around the forums.I haven't personally run an outrunner yet.Comment
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Maybe you did and I forgotten - or maybe you didnt, heck who knows with the many things we discuss on almost a daily basis anyway! hahaha!I think I mentioned it to you when you were just starting out that outrunner has higher timing since they are high pole motors unlike inrunners that are low pole motors. Maybe you just had senior moments brother! I'm guessing you ran raw prop as you always do? That may also affected the performance!
But im sure you can attest to my little 28mm outrunner which I used for the mini deep vee, right? It was wicked and esc timing on that was just at default of 15degrees.
My other 36mm size outrunners were surely fine too at 15degrees default - one example would be the F1 Tunnel run which you saw.
But maybe this bigger T600 requires a better timing than default - so will try it next time. thanks for the added info bro!Comment
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looks like its running wet, looks like you need to get the nose up and get it riding on just the rear less drag..Comment
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So Mac,at one point you had her rippin real good but it had a bad chine walk.Were you only part throttle most of that vid?
Got a pic of how far up from the transom the stinger is?And how long is that stinger?Comment
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That didn't take long.Both Carl and JJ said 30,no lower than 25.
I also forgot to mention,Check for hooks or that the bottom is flat and true.It can deform in curing.Comment
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Did I say something wrong.Got quiet in here suddenly.Comment
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Hmmm - thats weird. I normally get email notifications when someone posts here, so dunno why I didnt get any except the last one from Shawn. Anybody experiencing the same? Is it just me?
Sorry as I've been under the weather since Sunday - and today Wednesday Im just bedridden. We got rained out last Sunday - it was so strong that we hardly could see the pond which was just a few meters away. Everything got wet including most everyone's gear - down to our clothes. We had to cut our boating session short as just trying to get the gears into our vehicles already took some time.
Anyway, my boating buddies gave me some encouragement regarding the 40"Cig - nothing runs perfect the first time out!. I also dont wanna give up on it specially its custom, so im sure it has some quirks that I need to iron out.
Just to be on the safe side, I took off the engine mount, battery trays & esc mount and decided to move them a bit closer to the transom. This means that Im looking at a CG of 27%- 29" or thereabouts.
I also got a metal ruler & checked the bottom near the transom - and yes, there seems to be a massive hooking which I suspect happened when we fiberglassed the quarter scale servo platform. I would need to address this via putty and some bondo. I know this by some gas boat hulls hooking near the transom after the 5" railings are adhered.
Once these are addressed, we will try again - but I will still look around for a possible prop to use. Maybe something in the vicinity of 48mm-50mm would suffice?Comment
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I thought the CG looked a little to far up,
But also thought the cell would balance it out if they were more back at the transom.
On my 36"shockwave the CG is 8 1/2" from the transom,
The cells are about 5 1/2" from the transom.
The prop is a x446/3.
The outrunners run hotter then inrunners, Like 200f is ok for them.
And timing on my p1 kos is 15* and T600 is 30*, So I hear.Comment
? ONLY IF THEY WORK 
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