Are there any gas engines that will work nicely on a Showtime? Anybody try it?

I am going to buy a Showtime and slap a Roto 35cc in it.

Will post results when it's done.

absolutely - I am flying an EVO 26 on a full pipe on mine.
It will be a review in upcoming 3DFlyer

I know nothing about gas engines. What is a easy to run, very reliable, and good power fir engine? And can you give me web sites where to get them... Thanks guys!

Ok, I was looking at Chief Aircraft at that EVO 26 and it looks great! Runs about $399. Does it perform well, Dick? Does it mount upside down? What else is needed to convert the showtime to gas? Thanks again!

I just installed an Evo 26 in my Funtana 90 and it is an excellent engine but need to find a light muffler since the Pitts muffler is large and heavy.
The advertisied HP is nine/tenths more than the Roto 25. Don't know why the difference.
It only has maybe 20% of the vibration that the Saito 150 had.
It ran for 44 minutes on the stock 17 ounce tank that came with the Funtana 90 and am converting to a 10 Ounce tank which should give me at least 20 minutes flying and reduce the nose weight by 7 ounces.
While it is 4 ounces less than the Saito 150, the muffler adds a lot of weight and ends up weighing more than the Saito because of the muffler.
Looking for a lighter muffler, pipe or whatever.
3dbob

da 50 , but you'll suffer from very bad pullout unless you step up to the 150

evo motors are pretty nice though..

If you can keep the plane at the suggested 8-9 lbs. the new 3W 28i is worth a look. 42.72 oz. with ignition. The new ignition system is plug and play with all four battery groups, without the need for a regulator. I'm using a 900 mAh 7.4V liPo on ignition. Its not completely broken in yet and will turn an 18/8 @ 8500 rpm, yielding 15 lbs. thrust. Just put an 18/10 on with an rpm drop of 900, but still yields 15 lbs. Once broken in and on synthetic there should be some better performance and move to a 20/8 prop. The new ignition system is hotter on the low and high end. Transition is lightning quick and the engine runs smoothly. Check it out. Joe

The EVO on it's full pipe is perfect for the Funtana -
I am running this in a 10 lb 2 ozs model -which pulls and accelerates straight up from a hover -
my engine runs 9100 on the ground on 17x8 and simply yanks the hell out of the model. It is quiet smooth and sips gas.10 oz tank plenty big. I used a 14 oz and never run it over half way in close to 10 min of flying.
The power is comparable to the ROTO -on pipes-in both instances . The EVO weighs 8 ozs less and the carb is up front -so depending on what your model is , choose accordingly.
The EVO is as friendly to start and run as any gas engine I have or have seen - -It choke starts easily and thereafter -It starts by simply switching on power and making one easy flip at idle -you can't find any easier setup.
I have run the ROTO 26 in a Funtana and it also is very smooth and good power .
Do NOT use ANY brand in cowl muffler -you will be likely disappointed with lower power and or high noise.The pipe setup is easily best match
Weight -EVO- 32 oz engine - 12 header and pipe - 3 ozs battery - 5 ozs ignition. You are adding -over a 32 oz 4 stroke -about 14 ounces - (don't forget muffler!)
but you loose need for 8 ounces of fuel and about 1 ounce on tank - the mount required is actually lighter -as it is one hell of a lot smoother.
So net weight gain is under 1/2 lb.

MVVS / Evo has a coated piston / liner combination and a few other tricks that will give it the edge in HP vs the roto25. However, either line of motors are great.

Dick,

get a Mueller header and a 3M Mintor alum. pipe for that thing!!! Total weight 5.2 oz plus just going to the Mueller header I picked up 200rpm over the MVVS header. Running 8700 stinking rich on a Beila 17x10. Hope to have it in the air next week. See how it does on an Icepoint.

Could they use something as simple as a Jtec muffler for the EVO 26 in this combo and still get pretty good performance?

Pretty good? Not for me
A local helicoper guy has been working with another brand 26 and frankly has had poor performance -for a variety of reasons one of which is --no - tuned- pipe.
Honestly to stick one of these engines in a "performance plane" without the pipe is asking for compromised performance
Where I get 9500rpm -you can expect 1500 or more LESS.
Unless you run a straight stack -any so called muffler will kill it .
Where some run straight stacks on small gassers - they are are NOT repeat NOT increasing the torque which rises with a proper pipe setup

Dick,

What manf's pipe and header are you running? I am very interested in this setup, have flown a friend's Showtime with saito 100 and loved the couple minutes I spent with it, but I dont want another glow plane, and it's a bit expensive to E-power..not that that Evo is cheap

pipe n header are from Horizon and are from the engine manufacturer.
The setup is a direct bolt on and is not expensive.

Thank ya sir!

Would I be wrong to assume you like this better than the saito 100? Hows it compare power wise?

Would this be the pipe and header your talking about?

Exhaust Adapter,26GT (1.6) [EVO30943265] $20.69
Tuned Silencer,26GT (1.6) [EVO30943266] $62.39

Yes -
FWIW -if you want to use other pipes and headers - there should be no problem as long as you get the tuned length correct.
There are all kinds of devices on the market . CF pipes are great also -I have one -but price is more.
That setup is $83 bucks- aprox-- look at prices for the in cowl stuff -then remember this - any of those reduce power - so you would be adding money to reduce power.
Do this -pull up a Thrust/HP chart on your puter -
now plug in 18x8-prop- at 10,000 rpm--and--8000 rpm --look at HP differences.
try some other numbers too
The example I gave shows a HP drop of 4.5 to 2.3. pn the chart I grabbed
Are these charts accurate?
not really -too many variables but the slope of the power change is pretty close.
Last weekend, I had a flier ask me about tuned pipes .
He said he was told that pipes just let the engine run faster -the longer the pipe -the faster it ran-
Never heard THAT one before--
The fact is ,tuned exhausts raise the torque of the engine -to a new higher torque figure -typically(not necessarily) at a higher rpm.
The proof? run your prop with a open exhaust setup.
Now add muffler - read rpm- lower or higher?
switch to properly setup broad band muffled pipe -rpm should now be higher than open exhaust.
So -obviously -if the same prop increased in rpm - more torque was required.
Ne cest pa?

Dick,

Do you have the part numbers for the header and pipe and mount that you used for the EVO 26??? It looks like the pipe is not available yet but maybe the header is.

I'm really interested in this setup..

Gas engines will increase the wing loading a good bit...
you'll be close to 60 oz with muffler and ignition system.
vs. a ys 110 with only 28 oz.

Actually 52 ozs with a small 900 ma batt-which is plenty for the single ignition
fuel tank required is 10 ounces so - net difference is less than 52 /28.
The Evolution part numbers are listed above in post# 17.
The glow engines of equal thrust will always weigh less and the fuel volume consumed will always be more .
The two are locked together -
Wing loading goes up -22 to 26 (based on 8lbs to 10 lbs) however, thrust goes up . I get 16 pounds here at 4350 ft not calculated -measured.
It s a compromise.
This size model is right on the cusp of choosing glo /gas-- If it was 100 squares more -- the choice of the glow would be far less-for me.
My Saito 100 setup was 8lbs 2 ozs -so I can easily tell loading difference at 10 lbs 2 ozs. two, completely different performance parameters.

Thanks Dick,

I must have missed that post earlier....

Dick,

Sorry, more questions Is your engine mounted inverted, or is it canted to position the pipe? And, is the pipe/header pre-tuned?

Thanks,
David

I angled the setup to use the engine n pipe just as it came -no mods whatsoever.
The pipe is not at all peaky it is supposed to work well between 8000-10000 and it does .
After years of fixing so called packaged tuned pipes -this is the first one I have seen where it really works easily for anyone.
Tuned systems usually come with a "setup" chart of length to rpm header lengths and typically the new guy f--ks this up to a fare thee well.

Thanks Dick,

I have the engine mounted...I hope my measurements are right and the header fits like I want it to. Sorry to hear you lost yours...anything salvagable? This spinner is just there to verify I have it alligned right, not intending to use that one