aquacraft airforce airboat  
View related threads: (in this forum | in all forums)

Tower Hobbies
Enter up to 4 keywords or Tower stock numbers
Logged in as Guest



Users viewing this topic: none
  Printable Version
       



All Forums >> RC Boats >> RC Boats General Discussion >> aquacraft airforce airboat Page: <<   < prev  1 [2] 3   next >   >>  

Login
Message << Older Topic   Newer Topic >>
aquacraft airforce airboat - 8/5/2003 5:46:43 AM   
wakewatcher


 

Posts: 48
Joined: 7/1/2003
From: Sammamish, WA, USA
Status: offline
Well I got my maiden voyage in today. Kinda rough because of the wakeboarders in the lake. Had to negotiate some foot and a half high rollers. I was surprised how non responsive this thing is. Sure doesn't turn on a dime (or a half dollar) on the stock settings even with the d/r set on high. Of course I dont know what to expect as this is my first boat. Also I was surprised how much water she took in. Poured out a half a cup after 2 tanks. Not sure where it was getting in. (Although I plowed through the bow a bunch of times. Is both the turning (non) radius and bilge pump issues typical?

(in reply to sporty982000)
       Post #: 26

aquacraft airforce airboat - 8/5/2003 8:36:30 AM   
RcBoatLover


 

Posts: 143
Joined: 4/4/2003
From: Appleton, WI, USA
Status: offline
I don't have one yet, but every boat that I DO have takes on some water. 1/2 cup after two tanks it pretty good with the waves you were taking!

Guys, does The aquacraft engine have two needles or one?

(in reply to sporty982000)
       Post #: 27

Taking on water - 8/6/2003 12:38:44 AM   
weaselphd



Posts: 23
Joined: 6/12/2003
From: Monroe, MI, USA
Status: offline
Take it from me, go to the store and buy yourself a bag of balloons, seal your battery pack and receiver in seperate balloons, this will keep them dry and safe from any water you may take on board, i learned the hard way, luckily they gave me a new radio cause the boat was 3 days old, but trust me its worth the .99 cents for the package of balloons, i will post pictures later... i have not taken on much water but i have not run mine in rough water yet. i might suggest putting a tie wrap on the rubber boot that allows your rudder arm to move in and out, i think that may be where your water is getting in. plus its flexable it wont effect your turning...

WeaselPhD

(in reply to sporty982000)
       Post #: 28

Needles? - 8/6/2003 12:40:06 AM   
weaselphd



Posts: 23
Joined: 6/12/2003
From: Monroe, MI, USA
Status: offline
Which needles are you referring to? i beleive there is only one needle valve for adjusting the carb, if that is what your asking...


WeaselPhD

(in reply to sporty982000)
       Post #: 29

aquacraft airforce airboat - 8/6/2003 6:46:01 AM   
RcBoatLover


 

Posts: 143
Joined: 4/4/2003
From: Appleton, WI, USA
Status: offline
Thats what I was asking. Some engines have a low and high speed needle. Sporty wanted to know what others had there needle set at. Apparently the instuructions say to set it with by measuring the gap between the needle and carb body. I was kinda surprized that they said to set it with a ruler. I guess I wouldn't worry what size the gap was, but tune the engine by ear, and temprature.

Air boats have an atvantage that they can be run out of the water with out worring about over heating. They can also be tuned out of the water since there is a constant load on the engine. You should be able to start the engine with the needle set rich enough so that the engine won't develop it's full RPM. Then turn the needle in untill it nolonger speeds up. At that point turn the needle back a little to make it richer. Just take alittle off the top speed to make sure it isn't run too lean.

An easy way to tell if it's too lean is to bring it in after running it for a few minutes and place a drop of water on the head. It should not boil off, but just evaporate.

Just my two cents on setting the needle valve. I think it would be more accurate than trying to measure the "gap".

(in reply to sporty982000)
       Post #: 30

aquacraft airforce airboat - 8/6/2003 12:35:36 PM   
sporty982000



Posts: 85
Joined: 4/12/2003
From: IL
Status: offline
Okay,

let me see if I can be more clearer on this. so that I can get some help/ cuz I need some.

You actually have on the tower model .46 engine 3 jets. one is your common- high end. the one that has the nice big adjustment screw. out of the side ot the cowling.

you have a air/fuel mixture screw that actually is connected at each side of the carb, one is where to fuel line connects to the throttle body, this is where the fuel comes out inside the carb. the other side is the same side that you connected your throttle linkage too. it also opens or closes a little bit. your alimunim carb plate throttle. the turning also opens and that brass needle. I call it two because it is not one piece.

then you have a little black screw on top of the carb throttle body inlet. that is also inside you're preset non adjustable jet

Here is my dilema, i made a mistake and saying the manual. I got the info off of the tower hobbies site, (2mm)

The only way that I could set or see what I had was to insert a small flat head screw driver next to the brass needle (jet) and mark with a marker the gap then put the flathead screw driver next to a rulers that had mm markings. So that I could see what I had and where it should be.

Now you could probably do this a couple of different ways but that is what first came to my mind to try.

question 1-

how many of you have even touched that adjustment ?

I am wondering if you even have to since the manual does not mention it. only the high speed adjustment.

Now since I have 2 aquacrafts, They should both have the same settings, but they do not (from new untouched settings)

question 2- what is that mm size ? or is there a gap at all ?

Trying to figure out what everyone else has.

why -

I think one of them is wrong and i think it is the yellow one, the picture of the carb was from the yellow one that I have.

I think I may have a heat problem, but I am running rich, I start of really fast ans it seems to slow down after about 2 minutes of running.

but it is running rich, yet I think the gap is at 2mm what tower calls for.

now-

I have tried to reduce the gap and then the thing would not run at all. also I kept in mind that I also had to adjust my high speed needle as well.

So what I am trying to figure out is if my carb is messed up and junk or if it's my engine that is junk.

it runs nice, but like i mentioned, it slows down, but it should not do this and i have it running pretty rich, yet like i mentioned that it does not want to start if i change the setting on the gap of the brass jet.

yet my red aquacraft runs just fine so far and has no near the gap that my yellow one does.

so I am trying to solve ot come up with more information to make a logical and factuall asumtion on the matter.

Thats why I was hoping that I could get the measurement of the gap distance on yours

hope this helps clear matter up.

thanks

sporty

(in reply to sporty982000)
       Post #: 31

GPS Speed and Prop check 11x8 - 8/7/2003 7:21:17 PM   
weaselphd



Posts: 23
Joined: 6/12/2003
From: Monroe, MI, USA
Status: offline
Frustrated, well maybe i over-estimated the boats capabilities. last night i strapped the GPS onto my AirForce, and with the stock 11x8 prop, the top speed was 16.2 MPH. i have since purchased a 11x7 & 11x6 prop, the 11x6 prop is currently on there and i will run it again today, last night i ran out of daylight as you can see in the photo, it looks faster than it actually is, an sporty i know what you mean, im running mine at our private beach accesss to Lake Erie in Michigan. and looking out at other boats behind mine as you did the cars is not a good ratio... lol.. anyway i will re-run the 11x8 today too hopefully ill try a new plug too, but i dont expect this boat to ever hit 30 + MPH..

Questions or suggestions please let me know....

BTW: the GPS is a handheld and not that heavy i dont think it slowed the boat any, in fact i think if anything it kept the nose up a bit and ran better....

thanks
WeaselPhD

Attachments
Click to see fullsize image.
Click for fullsize

(in reply to sporty982000)
       Post #: 32

aquacraft airforce airboat - 8/7/2003 8:25:27 PM   
wakewatcher


 

Posts: 48
Joined: 7/1/2003
From: Sammamish, WA, USA
Status: offline
Has anyone changed the steering linkage? At the factory setting mine is very unresponsive even at with the d/r at full sensitivity. The instructions said to be careful of rollover but I don't think mine would ever flip over. Also one direction is a lot weaker than the other. I suppose that is because of the torque. Was thinking about moving the clevis in on the rudder.

(in reply to sporty982000)
       Post #: 33

Steering - 8/7/2003 9:03:03 PM   
weaselphd



Posts: 23
Joined: 6/12/2003
From: Monroe, MI, USA
Status: offline
I have not altered my steering, but since i have owned other boats, this boat (mine) steers rather well) im not sure what slack you are talking about i know its not going to turn on a dime, but mine turns on a quarter, in perspective... water creates a significant amount of drag on any boat...


please feel free to adjust your linkage your not going to hurt anything...

SPORTY: hey where did you buy that spare rudder???? im thinking of ordering one and possibly altering it make a wider paddle so it will turn sharper...


WeaseLPhD

(in reply to sporty982000)
       Post #: 34

aquacraft airforce airboat - 8/7/2003 11:32:05 PM   
sporty982000



Posts: 85
Joined: 4/12/2003
From: IL
Status: offline
I got mine through this link,


http://www2.omnimodels.com/cgi-bin/woi0001p?&I=HCAB27**&P=O

just click on parts index..

16mph, hhhmmm, I know that my yellow one is going atleast 25+. I just wish I had a gps to be exact. Like i mentioned I use the cars driving buy just behind the pond. I know I am overtaking the cars sometimes

30 seconds is what we timed for my circle path that i run. I posted somewhere how long and wide it is. it something like 8 car lengths long and 20 feet wide.

I have to be carefull when turning at that speed, she bobbles pretty good.

maybe thats the trick, is the screw setting I have been talking about the key ??? to get that kind of speed ??

as for steering I had to make sure that it was as low as it would go on the screws holding it in. I could not turn it very well when i first got it, it was set to high up. so I just untightined the screws and lowered as low as it could go.

now if you have already done this, then I would set it up to turn left and run a left circle track. it turns best left.I might have said before a right turn but If i did please ignore that and go with the left turn.

thats just my thoughts, because of the axis of the prop/engine mounting.


water, never got hardly any in the compartment, but the rubber ballons sounds like a great idea to me. when i flipped mine it was upside down for about 10 minutes in the water and it was dry when I finally got it out of the water.

also the small pond i run on has like no waves, mostly smooth.

sporty

P.S. nice pic !

(in reply to sporty982000)
       Post #: 35

aquacraft airforce airboat - 8/7/2003 11:43:21 PM   
wakewatcher


 

Posts: 48
Joined: 7/1/2003
From: Sammamish, WA, USA
Status: offline
Depending on how far the cars are behind the pond you may be going a lot slower. You are likely looking at angular velocity. For example if your boat is very close to you it doesn't have to go very fast to appear to overtake cars some distance away.

(in reply to sporty982000)
       Post #: 36

Agreed - 8/7/2003 11:51:25 PM   
weaselphd



Posts: 23
Joined: 6/12/2003
From: Monroe, MI, USA
Status: offline
thanks for the link i will go order one... i dunno even though im rnuning on lake erie, its very calm as seen in the pic, abd as for turning, i have the throttle barried full when i turn, and i have yet to see the boat flinchas if it were to flip, or tumble, i wonder why? im starting to wonder if my engine is not properly tuned and could be running too rich, causing the loss of power, im not arguing your speed of 25, i just find it hard to beleive that 16.2 is full speed on mine, there has to be something funny... i will try to lean out the motor some more today...

also i found something called an "auto-bailer" they are about 5.99 it is a brass tube with a ball float in it that will allow your hull to drain from the forward momentum, you might look into that its a cheap upgrade to keep your hull dry...

weaselphd

(in reply to sporty982000)
       Post #: 37

aquacraft airforce airboat - 8/8/2003 12:37:39 AM   
sporty982000



Posts: 85
Joined: 4/12/2003
From: IL
Status: offline
I took that into acount on the distance, the cars are about 20 feet behind me, they are on a incline (small hill) going up and down, directional traffic. I know that is not very close, yet I am pretty sure I am getting that speed.


weaselphd,

Yes I would bet you are needing to do some more fine tuning. it took me about 8 tanks to get it running fast. then once you get it there you will notice a difference.

here are some tips to try, try opening that brass screw up some, let that baby get some air and take your high speed screw to 2 turns, to off set the air causing to run lean. thats what I run at on the yellow boat. if weather is nice I am gonna run the red one and the yellow one this weekend and compare settings on the air mixture and see which one is faster and so forth.

this will help me get closer to solving the 2mm gap setting ?

how long of a run time do you have ? mine is about 4 minutes. 15% nitro, cool power fuel. I also run sig fuel. but I am liking the cool power fuel right now.

It took me around 8 to 10 tanks to really see the motor loosen up some and let loose some rpm ripping.


sporty

(in reply to sporty982000)
       Post #: 38

aquacraft airforce airboat - 8/8/2003 12:45:04 AM   
sporty982000



Posts: 85
Joined: 4/12/2003
From: IL
Status: offline
Factory Settings: High speed: 1-1/2 turns out Low end: 2mm gap Idle speed


from tower site,

sporty

(in reply to sporty982000)
       Post #: 39

aquacraft airforce airboat - 8/8/2003 1:42:48 AM   
weaselphd



Posts: 23
Joined: 6/12/2003
From: Monroe, MI, USA
Status: offline
Hey im running cool power 10% could that be my problem?


i will try that im home now im on my way over to the beach to play...

thanks for the tips...

weaselphd :

(in reply to sporty982000)
       Post #: 40

aquacraft airforce airboat - 8/8/2003 3:27:17 AM