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Old Apr 09, 2012, 08:10 PM
Winging it >
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Joined May 2006
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Originally Posted by rcrich View Post
Lf what battery and esc are in it?
My current power setup:

Turnigy nano 1000mAh 3s 45/90c $10.47 USA warehouse
HK 25/30 A esc $9.23
Turnigy 2730-3000 motor $10.78
Turnigy 2730-3000 motor USA Fancy Foam $16.25
APC 4.75 x 4.75
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Old Apr 09, 2012, 09:03 PM
When pigs fly rc
rcrich's Avatar
USA, NY, Chester
Joined Apr 2008
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I reall like and cant wait for some video! Do you think the cheap 9 gram servos by towerpro can hold up in this fast sled. Maybe need metal gear at this speed........
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Old Apr 09, 2012, 10:35 PM
Slipping the Surly Bonds
dz1sfb's Avatar
Attica, MI
Joined Dec 2006
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Originally Posted by leadfeather View Post
I propped up to a 4.75 x 4.75 and took it out in the "calm before the storm". this evening. Top speed was clocked at 90mph!! I was thrilled to achieve this with a stock motor.

And there is still room for more speed with the stock motor, it still came down cold!
I would love to break 100 mph with a stock blue wonder motor.
Dan,

Thanks for the heads up on whats happening here. I am just getting a similar setup in a new F-16 prop jet I am working on.

Ken
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Old Apr 10, 2012, 07:47 AM
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Originally Posted by dz1sfb View Post
Dan,

Thanks for the heads up on whats happening here. I am just getting a similar setup in a new F-16 prop jet I am working on.

Ken
Looks nice! Is this F-16 made from your new foam?
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Old Apr 10, 2012, 08:19 AM
Slipping the Surly Bonds
dz1sfb's Avatar
Attica, MI
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Originally Posted by leadfeather View Post
Looks nice! Is this F-16 made from your new foam?

Yes it is!

Ken
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Old Apr 10, 2012, 08:21 AM
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Yes it is!

Ken
I wanna get a box of your foam. When do you anticipate it will be back in stock?
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Old Apr 10, 2012, 09:59 AM
Slipping the Surly Bonds
dz1sfb's Avatar
Attica, MI
Joined Dec 2006
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Originally Posted by leadfeather View Post
I wanna get a box of your foam. When do you anticipate it will be back in stock?
We are getting a sample of the second production run either today or tomorrow for our approval. If we are able to okay it, probably within the next 3 weeks.

BTW that model there was made from a box of the seconds. That limited offer is an excellent deal.

Ken
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Old Apr 10, 2012, 07:21 PM
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Originally Posted by rcrich View Post
I reall like and cant wait for some video! Do you think the cheap 9 gram servos by towerpro can hold up in this fast sled. Maybe need metal gear at this speed........
I'm using the HXT 900 servos. I think they are up to the task. This plane is very pitch neutral so I don't think the servos are working much even at high speed.

On the power system and heat; I do not fly WOT (wide open throttle) all the time. For the speed runs, I set up an approach, full throttle for 4 or 5 seconds. Then during the pull up, I cut power and glide around for the next speed run. This is just the way I do it. It allows me to relax a little between the high adrenaline, low altitude, high speed passes. I think it is a lot easier on the power train too.

With the really thin wing I noticed the jet feels more skiddish at low speeds and actually "locks in" much better at high speed. Could be the thin airfoil or maybe due to the small-ish fin.
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Old Apr 10, 2012, 07:39 PM
When pigs fly rc
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USA, NY, Chester
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I always love your designs LF. I just ordered some parts for this build and the motor is rated for 2 cells and it will be run at 3 cell is that really bad for it? Or is that why you only use it for 4-5 second bursts at full out.
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Old Apr 10, 2012, 08:59 PM
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Originally Posted by rcrich View Post
I always love your designs LF. I just ordered some parts for this build and the motor is rated for 2 cells and it will be run at 3 cell is that really bad for it? Or is that why you only use it for 4-5 second bursts at full out.
Motors should be rated for amps or watts , not cell count. If you pull the same watts with 3s and a smaller prop compared to the watts pulled with 2s and a larger prop you should be fine. Always start conservatively and check (heat) as you go.

The short bursts of power and high speed cooling both will keep the motor from overheating... overheating is the main concern of pulling too much power.
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Last edited by leadfeather; Apr 10, 2012 at 10:30 PM.
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Old Apr 10, 2012, 09:45 PM
When pigs fly rc
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thanks understand now.
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Old Apr 11, 2012, 08:31 AM
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I want to prop up a little more still, since the motor is coming down cool and I want to explore the practical top limit of my current set up with a stock motor. I "think" I want more pitch but not more diameter. I'm considering cutting down a 6 x 5.5 prop to 4.5 x 5.5. Not sure if this is the right way to go... time to study up on props a little.
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Old Apr 16, 2012, 10:10 PM
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United States, MN, Minneapolis
Joined Dec 2011
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motor mount

Can someone point me to a good motor mount for the Turnigy 2836-2350? It looks like some folks are using the GWS mounts. Is there any place in the US that stocks these?
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Old Apr 16, 2012, 10:37 PM
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adreher's fast little 16" X-Raycer.

Adam's X-Raycer ....fast.... (2 min 44 sec)
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Old Apr 16, 2012, 11:21 PM
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USA, CA, Elk Grove
Joined Jan 2009
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I bought both the Tee and L brackets here, and plan to try them out on my next X-Racyer. My GWS mounts seem to break often (yeah its me).

http://justgofly.com/Order%20Form.htm#Mounts

Compass
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