digital_trucker

I've been taking a closer look at the CS .061 R/C I picked up from Carlson a while back. That engine has awesome pinch. I'm going to try to run it this weekend. The only thing missing from that engine (as far as I'm concerned) is a turbo head...yep, it's another standard plug.

AndyW

My Feedback: (1)

If you have a Norvel .074 glow button, you can bore out the head clamp and it'll drop right in. That will give you an extra 1500 RPM. Then there's the Nelson retrofit.

There IS another thing missing though. That's an adjustable airbleed.

Japanman

Andy, I didn`t spot the piston size being the same as the norvel 061.. thats good news, as the cylinder timing on the Toki looks pretty much in our ball park.
I am tracking down a source of high silicon aluminum to make some pistons from- so I can make some good pistons for the ABC and AAC engines I have.

I am guessing that the trinity engine is actually a true .07 engine, looking at the piston size. But that exhaust port timing looks too hot to me, though as you say, the rod looks good.

J.M

AndyW

My Feedback: (1)

Japanman,

Just FYI, I have just managed to install the crank out of the LiteMachines, VMax7 (.074) into a Norvel .049 case. This is the short block version of the Norvel heli engine supplied exclusively to LiteMachines. This will have the stroke of the .074 and the bore of the .049 and that comes to .054. Not a lot of difference but this will be a true long stroke and it'll be fun testing it to see if we see any benefits or difference from the stock .06. Vintage diesel engines like the Mills all had long strokes and this gave them the piston speeds (when hand flipping) to start more easily. In some quarters, long strokes are said to deliver more torque.

I had tried to install a rear bearing into the Norvel .06 but the stumbling block was that no one makes a bearing with a bore of 7.5mm. A bushing was used but this led to leakage, (I presume) and erratic performance. The .07 crank is 8mm and this is perfect. So we can also install a bearing into any Norvel .074.

Installing the .07 crank into the .06 gives us an .065. Again, not that much more but cubes is cubes and also, the bore of the crank is larger on the .07 so that'll give us better fuel delivery to the crankcase.

This is great, now I can bore AND stroke the .06 and complete with a ball bearing on the back end and a bushing on the front end, might we have very light weight, high tech .08 engine that's only marginally heavier than the original but will deliver the punch of,,,,, well, we'll see.

About high silicon aluminum. Typically, this has visible grains. Norvel and VA used some kind of grade that did not have this. Much like an ordinary ally, it still had the low expansion rate of the standard, high silicon aluminum. Here, http://www.tennalum.com/td4026.htm we have a 4026 grade that appears to be the stuff Norvel used in their AAN engines. The problem is, they will only sell this in 12 ft lengths. I've turned and lapped Norvel .06 pistons to fit .049s and this stuff cuts easily and cleanly. If you find a source for this or any other suitable bar stock, please let me know.

AndyW

My Feedback: (1)

Shoot, on a closer look, it appears that the Toki piston won't do. Both engines have the exhaust oriented between full back and side exhaust. Installing the P/L of the Toki into a Norvel might require a bit of compromise at the exhaust end. But that liner sure do look good. I've got Norvel AAN pistons (thanks Combatpigg) that are all over the tolerance range so maybe one of them will allow for a good, TDC pinch, in a Toki liner.

AndyW

My Feedback: (1)

Evgeny,

You may know this already but a good source for high tech bearings, ceramic and such is, http://www.bocabearings.com/main1.as...ksearchbearing
They offer all metric and imperial sizes with seals and shields.

And while I'm at it, for all those who needed a tap for the turbo plug conversions, here's a source, http://www.newsontool.com/index.html for that, much cheaper than anywhere else. They also have some interesting drill bit sizes. Such as 7.4mm, 7.5mm and 7.6mm. I've got these and will be trying them as a poor man's reamer. Since then, though, I've found a source for metric reamers that are quite affordable here, http://www.bibbtool.com/advanced_sea...f5a6&x=19&y=16

Falco250

Hi all, Victor Machinery also has a wide selection at good prices:

http://www.victornet.com/cgi-bin/victor/index.html

Falco250

digital_trucker

I attempted to run my new Toki .05 today, without much notable success. I had nearly completely unscrew the NV just to get it to run at half throttle, at full throttle it'd wind down and die. I noticed it was blowing bubbles from between the backplate and case, I may have found the problem . Will update when I have a sealed crankcase to work with.

GrahamC

Is yours one of the Toki versions (ie black / red) or one of the Fuji versions?

I had one of each on order but it was taking forever to get them to ship the engines that I finally decided to just cancel the order. I don't think I am going to miss them either.

On another note, the Toki / Fuji engine is essentially the same eninge as that being sold by Horizon under the name Sportwerks


It is the engine which comes stock with the 1/16 scale Nitro 4wd buggy:

http://www.sportwerksrc.com/Products...ProdID=SWK1400


Engine and spare parts noted here:

http://www.sportwerksrc.com/Search/D...rm=05%20engine

and here on Horizon Hobby's site:

http://search.horizonhobby.com/index...d=11A1056993E7


And, imagine that, Sportwerks even has it's own Wikipedia entry:

http://en.wikipedia.org/wiki/Sportwerks


You will find a number of eBay stores which also sell the engines and parts as well

If you search about for details on this engine or the Nitro buggy you will find reference to a common hop up - that is to replace the engine with the drop in replacement Picco P-Zero.

Please keep posting comments and experiences with the Toki / Fuji 05. It is always interesting following the exploits and ups and downs of our 1/2a engines.

cheers, Graham

digital_trucker

Mine are the black ones with the red heads (I got two of 'em). Even though I couldn't get it over half throttle (and it wasn't running all that well either) I did notice it was whisper-quiet. I see by the spare parts listings that it doesn't appear to even HAVE a backplate gasket. I'm guessing it's supposed to rely on a machined fit to seal...except that this one isn't. No biggy, a little brown bag paper coated with light machine oil provides a good fix for that.

Something else that's mightily impressive to me is that the high-speed needle is adjustable with the included allen wrench, long enough to keep your fingers out of a 6 inch prop. I did replace the airbleed adjustment screw with an allen head screw to get the same advantage on the other side of the carb. One thing I don't much care for is that you have to remove the fuel nipple to get the exhaust on and off...and obviously you have to remove the exhaust to get at the mount bolts.

digital_trucker

Mine's a piece-O-crud. Spits gobs of raw fuel out around the NVA...no fuel tubing solution for this one.

vicdat

I've had good luck with my Toki .05 as supplied with my Sportwerks 1/16 nitro buggy. It often starts on one pull, has held a tune since new, about 1/2 gal of 30% ago, and pulls fairy strong at 210 degrees F.

AndyW

My Feedback: (1)

Evgeny,

Only a 500 RPM difference between a 6 X 3 and a 7 X 4 prop? That is amazing. I wonder what might account for that. Perhaps the timing is such to favour the larger prop. Most interesting and thank you for sharing this information.

Now I wonder how this little gem might behave as a diesel engine.

AndyW

My Feedback: (1)

Whups, as I look at the pics, I suspect a typo. Both props look to be 6" with the pitch at 3" and 4".

Still, a most succesful project and a candidate for dieselizing.

AndyW

My Feedback: (1)

Evgeny,

If I may, I now understand what you mean. I can also understand difficulties in translation.

By screw, you mean airscrew, or propeller. You have taken a 7 X 4 prop and reduced the diameter to 160mm or about 6 1/4 inches. You have also trimmed the width of blade making it necessary to carve the airfoil so that you have less pitch at the tips but more pitch in the middle. That is unique work. Thank you, I must try that. Did you retain a semi-symmetrical airfoil or did you make it flat bottom ?

This is great work and shows possibilities for this engine. With ball bearings, a robust crank and ABC construction along with a light weight carb, this may make an outstanding, 1/2A diesel engine. And you've shown that it doesn't have to be so heavy. I really like your muffler design.

Yuu

Trucker.... if these other guys claim good results with the engines in 'buggies', could it be you're using airplane fuel and they are using 'buggy' fuel? I thought there was way less oil in the buggy fuel?

digital_trucker

The more I think about it, I'm suspecting I may have had an installation problem. I haven't had the chance to do any bench testing to confirm it though. I also need to mod my MP Jet carbinto a 2-needle carb, test run my new PAW .049...etc. etc.

Current focus is on finishing up a set of plans for a Druine Turbulent.

Dan Vincent

DT,

You sound like me. All kinds of engines to run and projects I want to do but my time is pretty much at the mercy of my wife and taking care of my grand daughter's horse.

My tractor battery died which kills my power panel and electric starter.

Got to get a plan.

Pond Skipper

Update on this for those that still have the engine.
All up weight is 96g with header, tuned pipe and prop / spinner.
http://www.rcgroups.com/forums/showt...2684743&page=2

https://www.youtube.com/watch?v=e23ckFOAAxQ

https://www.youtube.com/watch?v=e23ckFOAAxQ Published on Jul 16, 2016
Fuji .05 / Profi .8cc Tuned Pipe
HQ Prop 4x4.5 / Idle 9.3k rpm / 28,746 rpm / 122.4 mph
.197hp / 147w / 10oz thrust / Pipe set up per Bolly Book at {8.8in / 31k}
If at 32.5K unloaded 140 mph potential down wind awesome set up for a
.05 converted car engine standard glow plug 30% Nitro / 72F room temp.



https://www.youtube.com/watch?v=Id3Uun8gG5s

https://www.youtube.com/watch?v=Id3Uun8gG5s Update on the Fuji engine open exhaust 27,280 rpm with the goo extension on the manifold.
.168hp / 125w / 8.7oz thrust / 116 mph / anticipate 31k unloaded down wind 132 mph.



Vintage small OS carb with same bore as a modern one, AP .061 spinner
thinner prop thrust plate, sportwerks header profi tuned pipe. Sportweks
aluminum head cut down and reduced in dia. Small pressure tap on the header
pipe 1.5mm bore. 2-56 thread. Key minimize weight on the axle, don't use
a thick blade or heavy prop HQ Props are carbon / nylon mix thinner blade
and plenty strong for the job. Don't use the heavy Mecoa spinner and thrust
plate that has everything hanging further out past the front bearing.

Pond Skipper

https://www.youtube.com/watch?v=1D2sc-FtmKI&feature=youtu.be


Published on Jul 24, 2016
DART- Fuji .05 Profi Tuned Pipe 34,985 rpm Best pass 4x4.5prop
149 mph best pass per audio tach will doppler check next.
20% oil / 30% nitro / Temp 91F blazing sun made it seem hotter!
Static best peak 27,939 / 8.7oz / 134.3w / .180hp at launch 27.7k
1oz fuel tank almost all full throttle use gave 5:20 mins in total.

DART is a .09 size plane bit too big for optimum performance
but good enough to test engine output and run time.



https://www.youtube.com/watch?v=7IaQ4o_qXZ8 Update reviewing second vid Best pass 36,747 rpm 157mph
With the right size plane the prop speed can be used to it's full advantage.

Also this ran very clean the plane didn't have oil spray all over
the wings and such the norm with a TD engine this time only
a very thin mist over the vertical stab and a hair bit on the horizontal
other than that butt clean all the way to the engine nada oil.

Update: Per Doppler wave analysis it was really going: 238 kmh / 147.89 mph best pass.
Down wind shallow dives gets the rpm / speed up prop is too small into the wind or when
pushed in steady banking turns. 8oz RTF plane and a 70sq. in wing with a thinner airfoil will
get the most out of the engine.

Pond Skipper

Picco P-0 .05 / Profi Tuned Pipe - APC 4.2x4 / 28,585 Static
(0 min 51 sec)[/TD]



Published on Aug 6, 2016

Picco P-0 .0519 Cu. In. /.85cc / APC 4.2x4 / 28,585 Static
11.9 oz thrust .209 hp / 156w / 108.2 mph
- Mecoa Toki / Fuji Muffler APC 4.2x4 / 26.570k Static
[/TD]
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