XJet

I'm with Dave, the TT42GP is a great-value engine that just eats the OS40LA for breakfast.

I've got one that's been doing a *lot* of hard work on our club trainer. It's been lawn-darted more often than I can remember, even onto tarmac. It's missing several head-fins and I've had to put a remote needle-valve on it to save on repairs (after each crash) but it's still an incredibly strong motor.

The 46-sized engine of choice at our club is the TT46Pro. Slowly all the old OS-fans have come around and now every new .46 engine is a TT. They are just so foolproof and offer about 200% better value than OS.

paulsen

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I'm gonna try a MCP on my OS .37 in my heli. [sm=idea.gif]

paulsen

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LOL maybe even my .28 monster truck, I'm gonna go mousse can crazy!!!

Dave McDonald

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You can't select the can based on brand name or net ounces because they vary too much. That's why I listed the measurements of the can instead. Just make sure the can is seamless aluminum so it's light weight.


For the 28 you'll need to use the smaller mousse can listed in the instructions. (1.5" diameter by about 6" long)


Yep, once you see what a MCP can do, you'll never be satisfied with a stock muffler again.

I found a video link to one of my 3D spad planes that was powered by <insert drum roll here> a TT 42 GP w/MCP. The plane weighs 3.5 pounds dry, which should be very close to the dry weight of the Yankee Twister.

http://www.spadtothebone.com/videos/mcdddfunflying.wmv

The TT engines are very good.....on par with OS in many cases, and superior in some (GP vs. LA).

BUT.....the TT factory must use anemic grannies with arthritis to assemble them because none of the screws, bolts, nuts, etc. are fully tightened when you get the engine. This can cause air leaks that will drive you crazy when trying to tune it. But the cure is simple. Before you ever run a TT for the first time, tighten everything. If it can come apart, tighten it. (head, backplate, carb, needle valve assembly, fuel nipple, etc.) The end result will be an engine that runs great.

Oh Yeah!!

Great vid Dave!!

Thanks again!!!!

paulsen

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Did that spad plane lawn dart at the end of that video? Ouch [:@]

Dave McDonald

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Yes.....but no "ouch". Walked over, restarted the engine, and off it went again. It's almost impossible to kill those 3D spad planes!

evan-RCU

Your X-Box looks easier to land than my Beach Ball...

JPMacG

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Dave,
That Eagle 2 video is incredible. Is that Eagle 2 stock? Are the control surfaces enlarged? Mine will hardly do an aileron roll.

Jon

Dave McDonald

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It's just a stock Goldberg Eagle 2 ARF. Stock control surfaces with normal throws. The only modification was to make it a tail dragger.

paulsen

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You made an aircraft called a beach ball? Could we get a peak at it somehow pix/vid/or website? Or did you mean an actuall beach ball? [sm=lol.gif]

Oh Yeah!!

Hey Dave,

Getting ready to purchase a TT-42GP and was going to go ahead and get the exhaust header pipe kit for the MCP too.
Which one do I need??... looking to purchase from Tower Hobbies.

Thanks,
Phil

Dave McDonald

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This one:
http://www2.towerhobbies.com/cgi-bin...?&I=LXZ617&P=7

It's the Macs standard header for the OS 40 FP/LA. It also fits the TT 42 GP.

Oh Yeah!!

Thanks Dave

I know you prefer not to use the stinger, but I believe I am going to try one, just to try and keep the cleanup to a minimum.
For the TT-42GP you say to use the 5/16 size aluminum tubing... What thickness??---- .014", .035", or .049"

Thanks,
Phil

paulsen

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I'm suprised no one has capitalized on making a MCP style pipe, or have they already?

Dave McDonald

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Any tubing with an ID between 1/4" and 5/16" will work. The advantage of the 5/16" ID tubing is that you can always pinch it down if the exhaust outlet area is too big.

For example, here's a photo of an exhaust stinger that was pinched down. Notice how small the outlet area really is, but that's where the TT 42 GP in my Fazer ran the best overall.

Oh Yeah!!

Thanks Dave

What kind of pushrod set-up did you use with your Stick-it plane(elevator and rudder)??
My plane uses a 2 oz. tank. Is this going to feed the TT-42 GP long enough for at least 5 minutes of flight??

Thanks

Dave McDonald

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I've had two Stickit IV planes. I built the first one that you see in the avatar, the second one I bought used.

The first one had the servo arms hidden inside, the second one had the servo arms exposed. I highly recommend going with the exposed servo arms because it makes the linkage setup a lot easier.

Both planes used a 1/16" music wire pushrod on the elevator with two small equally spaced nylon guide tubes to keep the pushrod from bowing.

Both planes also used a pull-pull cable for the rudder. The first used two small guide tubes for the cable, the second used only a single guide for the cable. The single guide worked just fine.

I ran a 4 ounce tank on my Stickit, which is the size I'd recommend for sport flying.

Oh Yeah!!

Thanks Dave... I really appreciate the help.