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RE: Showtime
I liked mine with the BCMA 26cc. It had plenty of power for hovering and pulling out of a hover. I did not add any tail weight, but I put the rudder servo in the back and I put the Rx battery on a tray I made about 1/3 back from the trailing edge of the wing in the tail, (I think it ended up being about 8" or so aft of the trailing edge of the wing).
I'll try and embed a couple short videos of me during some first attempts at hovering a long time ago. The links are below just in case RCU doesn't allow for the embedding of videos. http://www.youtube.com/watch?v=Vv679z4v7A0 http://www.youtube.com/watch?v=FiQbnF2HJOM <object width="425" height="350"> <param name="movie" value="http://www.youtube.com/v/Vv679z4v7A0"> </param> <embed src="http://www.youtube.com/v/Vv679z4v7A0" type="application/x-shockwave-flash" width="425" height="350"> </embed> </object> <object width="425" height="350"> <param name="movie" value="http://www.youtube.com/v/FiQbnF2HJOM"> </param> <embed src="http://www.youtube.com/v/FiQbnF2HJOM" type="application/x-shockwave-flash" width="425" height="350"> </embed> </object> |
RE: Showtime
ORIGINAL: P-Diddy I liked mine with the BCMA 26cc. It had plenty of power for hovering and pulling out of a hover. I did not add any tail weight, but I put the rudder servo in the back and I put the Rx battery on a tray I made about 1/3 back from the trailing edge of the wing in the tail, (I think it ended up being about 8" or so aft of the trailing edge of the wing). I'll try and embed a couple short videos of me during some first attempts at hovering a long time ago. The links are below just in case RCU doesn't allow for the embedding of videos. http://www.youtube.com/watch?v=Vv679z4v7A0 http://www.youtube.com/watch?v=FiQbnF2HJOM <object width="425" height="350"> <param name="movie" value="http://www.youtube.com/v/Vv679z4v7A0"> </param> <embed src="http://www.youtube.com/v/Vv679z4v7A0" type="application/x-shockwave-flash" width="425" height="350"> </embed> </object> <object width="425" height="350"> <param name="movie" value="http://www.youtube.com/v/FiQbnF2HJOM"> </param> <embed src="http://www.youtube.com/v/FiQbnF2HJOM" type="application/x-shockwave-flash" width="425" height="350"> </embed> </object> |
RE: Showtime
P-diddy that looks sweet what prop r u running?
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RE: Showtime
That was the APC 16X4W, I believe. The other one I ran was the Xoar 18X6. I really prefered the APC. It brought the engine up to just about 9k RPM's, so I had a really nice throttle range.
The oil is Klotz SuperTechniplate from Tower Hobbies at about a 40:1 ratio. This was after a few gallons through the engine, so it was nice and broken-in. The biggest mistake I'm finding that people that move to gasoline engines are making is running the engine rich during break-in or expecting the engine to be broken-in after a few tanks like in most glow engines. The gassers really pick up a lot of power after they're thoroughly broken-in. I didn't do anything to keep weight down except move the battery pack aft instead of adding weight to the tail. -Pat |
RE: Showtime
Yea, mine is really coming alive on it's second gallon. I'll give the 16-4 a try.
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RE: Showtime
You'll find that these engines break in much more quickly on non-synthetic oils and from running higher RPM's. As long as it doesn't get too lean, there's nothing wrong with letting it wring out a bit. Adam at BCMA told me that as long as I kept it at around 9k RPM's max it wouldn't hurt it.
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RE: Showtime
Hooray, Pennzoil air-cooled!
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RE: Showtime
i think i will go for the Evolution, anyone got some pics showing the pipe / muffler fitted.
will the tuned pipe make much differance from the inverted wrapround muffler ? i'm not after squeezing all the power from this, just want a nice clean setup. my main current planes are the mini showtime and a Pulse 40 XT, will this be a big step for me, i'm a confident flyer and starting to throw the mini showtime around quite a bit, will the bigger showtime be easier to fly that the lightweight mini? http://www.evolutionengines.com/Prod...943400-250.jpghttp://www.evolutionengines.com/Prod...44266E-250.jpg |
RE: Showtime
I haven't flown the mini, but I know that the 90 size flies great. Depending on the distance between the engine and firewall, you may have to modify the front end to get the pitts muffler to fit. The tuned pipe will provide more power and (probably) less modification. Both will provide a "clean-ish" setup.
Pitts muffler is cheaper, but produces less power, and you may have to hack-up the nose... Stuffing a gas engine in my Showtime took a little work, but I think it was worth it. |
RE: Showtime
due to shop clearance i'm able to get 3x HS5645's and two HS925's very cheap.
was thinking of using HS925's on the ailerons and the HS5645's in the tail, do you think this should be OK ? evo 26 is still what i'm thinking of up front, what prop would you recomend ? 16x8 ?? i have had someone local say a use a SC108 or SC120 2 stroke, but i really want to get away from the Glow mess and fuel cost's also would you recomend using plastic hindges or are the CA ones OK ? really want to get started on this, but the wifes put it away until my birthday on 29th, gives me time to get engine ect sorted |
RE: Showtime
18x6 apc is what you should be running on that engine
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RE: Showtime
Definitely do NOT use the stock CA hinges!!
I had read about several failures after I had already built and flown my Showtime several times. Then, one day, one of my elevators separated from the stab. The plane was acting funny so I decided to land it, and it became VERY unstable when I took the power off to land. When it came in the elevator half was still attached by the control horn but all the hinges were gone. Use Robarts or similar. |
RE: Showtime
The CA hinges are crap. Mine sheared in half when I bumped my elbow into an elevator. I replaced mine with some Great Planes non-CA hinges. As for the prop for your Evo. something in the 17-18" range would be good. I like APC, but they get pretty heavy in the larger diameters. I'm not familiar with those servos, but as long as they're over 80 oz.in., you'll be fine.
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RE: Showtime
v8mini:
Those servos will work great on the ST. In fact, they're a little bit overkill, which is good! I have had great luck with the Xoar props. The 18X6 was what I was running on the BCMA 26cc. -Pat |
RE: Showtime
i'm currently flying with two clubs, one that i spend most time at is Electric only and they are trying to talk me into making my showtime 90 electric powered.
i'm sure it will cost too much as i would want at least 3 battery packs for it and they would be more than the cost of an Evo 26GX alone before getting a motor and ESU ect. i'll see what their ring leader has to say on thursday, maybe he's got some secondhand bits to sell me. i think i will be a hard sell to get away from the Evo 26 GX |
RE: Showtime
For who are intrested...
Hangar 9 Showtime 90 + OS 160 FX Project http://www.rcuniverse.com/forum/m_75...tm.htm#7602899 |
RE: Showtime
V8mini, stick with gas;).
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RE: Showtime
ORIGINAL: OK2Fly V8mini, stick with gas;). the electric club started on me on sunday, and i know the main chap who will try and talk me round will be there tomorrow on our club night. it will cost be about £300 for the Evo and muffler, and 3 batteries will be more that that and i wouldn't want any less than 3, plus the motor and ESU cost when its done it will have to be just for normal calm flying for now, managed to break my second mini showtime on monday, should be fixable. think i need to try new things on the aerofly sim more before the real thing. |
RE: Showtime
couldnt wait for the Evo 26GX to be available in the UK, so i have just ordered a MVVS 26 IFS SP which is the same engine any way, plus is a bit cheaper, especially the manifold and pipe compared to what Evolution ones are.
just need to sort batteries, and fuel tank, any sugggestions for tank size & type, needs to be for a good 12 min flying. http://www.puffinmodels.com/images/m...mvvs26sp-m.jpg |
RE: Showtime
v8 good deal keep us posted of your findings
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RE: Showtime
An 8-10 oz. tank should be fine. That engine looks sweet.[8D]
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RE: Showtime
think i've got everything ready for my build.
MVVS 26 turned up yesterday with pipe ect, i was quite surprised how big the tuned pipe was @ 40mm dia, but then i suppose the whole thing will be bigger than i'm used to. managed to find out how the spektrum AR6200 can be set up for duel ailerons and duel elevators[link=http://www.rcuniverse.com/forum/m_7651987/anchors_7651987/mpage_1/key_/anchor/tm.htm#7651987]clicky for details[/link] got a 2000mah 2s lipo for ignition and 6v 2700mah for radio on there way. got a heavy duty switch for the ignition, not sure if its really needed. just need to get my hands on the model, that the wifes hid away until my b/day on sunday. will get some build pics up hopefully next week |
RE: Showtime
kewl v8 when r u posting pics?
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RE: Showtime
Alright, guys, my BCMA is gonna be replaced with a CRRC 26. I'll post what I find. Judging by YouTube vids, this thing's got some power...and it's cheaper!
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RE: Showtime
3dguy the bcma is just not cutting it?
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