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Everything Radial Engines

Old 11-03-2014, 04:50 PM
  #3651  
jymster
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Originally Posted by BobH
I have an Evolution 160 gas. What's the thinking on using 100 octane low lead av gas for fuel? No additives no ethanol. Good?
Bob, the manual recommends 87-91 octane fuel, so not sure if 100 octane would be too high. Might blow the heads off! However, we are using 95 octane fuel here in Australia, as our lower octane fuel (91) contains 10% ethanol. 95 octane seems fine so far.

Regards,

James.
Old 11-03-2014, 07:08 PM
  #3652  
BobH
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James,
Thank you.
I know the manual recommends 87-91 Octane. The higher (100) octane fuel shouldn't matter to my way of thinking. The compression isn't high enough to take advantage of the higher octane. Octane only delays the ignition on higher compression engines. Thus preventing pre-ignition.
Those are my thoughts. Perhaps they are wrong?
Old 11-03-2014, 07:10 PM
  #3653  
fredo
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Hi folks
Can somebody recommend the best airframe for my Moki 150? I had it in my scratch build Bucker Jungmeister but sold that plane minus motor since then and now I'm thinking to find a home for it. Either kit or building from plan...I'm easy either way. It doesn't necessarily have to be a warbird.
Old 11-03-2014, 08:18 PM
  #3654  
BobH
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Lots of planes for that engine. WWI planes would be any of the 1/3 Pups or DR1's or Camels.
WWII would be P-47 Meister sized. Maybe a Large Waco 1/3 scale.
Old 11-03-2014, 08:44 PM
  #3655  
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Originally Posted by BobH
James,
Thank you.
I know the manual recommends 87-91 Octane. The higher (100) octane fuel shouldn't matter to my way of thinking. The compression isn't high enough to take advantage of the higher octane. Octane only delays the ignition on higher compression engines. Thus preventing pre-ignition.
Those are my thoughts. Perhaps they are wrong?
You are probably right, Bob. Maybe give it a go and see what happens?
Old 11-04-2014, 03:58 AM
  #3656  
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Originally Posted by fredo
Hi folks
Can somebody recommend the best airframe for my Moki 150? I had it in my scratch build Bucker Jungmeister but sold that plane minus motor since then and now I'm thinking to find a home for it. Either kit or building from plan...I'm easy either way. It doesn't necessarily have to be a warbird.
You could build a 1920's Air Racer. I like the travel air type R mystery ship.
Old 11-04-2014, 01:33 PM
  #3657  
fredo
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Travel Air Mystery Ship is one of my favourite but where can I get a set of plans for it? I was also thinking Polikarpov I-16. I scratch built one years ago and it was a beautiful flyer. Don't feel like going through the headaches of making my own set from a 3 view drawing again. The trouble is, if you want something exotic, you probably won't find it, unless you make your own.
Old 11-04-2014, 04:26 PM
  #3658  
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Take a look at Wendell Hostetler plans. There are lots of options.
Old 11-05-2014, 08:32 AM
  #3659  
super puma
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Check : rc-eljot.de they have a lot of unusual models, also Polikarpov .
Old 11-05-2014, 09:31 AM
  #3660  
outacontrol41
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Default Ignition batteries for radial engines?

Does anyone know where I can still purchase NiCad batteries for the ignition of radial engines? I have a Moki 150 wheras it states NiCad batteries must be used (4.8 V 1600mAh). The same instructions for my old O.S. FR3 Sirius 300 5 cyl. radial. What are we now using in place of NiCads since they don't seem to be available anymore? The instructions are really vague about battery use.
BTW...Just breaking in the FR3 and it fires all the cylinders at first but then two always drop off after about 45 seconds and it spews fuel/oil from the exhaust. I'm, for now, using a McDanials glow driver and using a Hobbico 4.8V 2000 mAh Hyrdrimax. It runs but not well.
Have not started the Moki yet.... looking for input on that as well.
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Old 11-05-2014, 11:34 AM
  #3661  
redball8
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Just use NiMH batteries ...
Old 11-06-2014, 03:41 AM
  #3662  
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Don't know how you have the glow set, but I would suggest you keep the power to the plugs on fully until the engine is broken in.

RCTen
Old 12-25-2014, 05:03 PM
  #3663  
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I just got an OS fr5-300 radial for Christmas. Is there anything I should know while breaking this in? This is my first radial engine.
Old 12-26-2014, 12:29 AM
  #3664  
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Follow the manual to the letter would be my first thought. I have a sonic Tronics auto glow system on my Evo radial. This stops the lower cylinders the chance of oiling up. You might want to consider one of those in the future- if the need should arise. Though with OS it shouldn't need it.
Old 12-26-2014, 04:44 AM
  #3665  
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I think I am going to invest in the onboard glow system just to avoid the hassles of the bottom cylinders.

On another note I know a guy that produces the Fred Reese Mystery Ship for the guy that was asking about it earlier. He makes the 1/4 scale which might work with your Moki 150.
Old 12-27-2014, 08:47 AM
  #3666  
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dasquirrelisme- who is producing the Fred Reese kit?? I've been trying to find a 1/5-scale kit of the Mystery ship for a while now; it would make a good home for my Saito 120R3. Please PM me!
Old 12-27-2014, 02:21 PM
  #3667  
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Originally Posted by dasquirrelisme
I think I am going to invest in the onboard glow system just to avoid the hassles of the bottom cylinders.

On another note I know a guy that produces the Fred Reese Mystery Ship for the guy that was asking about it earlier. He makes the 1/4 scale which might work with your Moki 150.
hi rv7, it used to be Petes Hobby Center, you could try them:

http://peteshobbycenter.com/index.ph...&product_id=36
Old 12-27-2014, 05:01 PM
  #3668  
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I was referring to Petes Hobby Center. I own a NIB original Fred Reese 1/5 scale Mystery Ship kit but it would take a REALLY good offer for me to get rid of it. I looked for 4 years to find it and have not found the time to build yet.

I seen a guy that built one with the 120 but I thought the 170 or 200 might be better.
Old 12-27-2014, 06:33 PM
  #3669  
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Yeah, Petes Hobby Center doesn't produce those fiberglass kits anymore, unfortunately . I bugged the owner for 6 months, and finally gave up.


I had a kit cutter enlarge the AMA / Laddie Mikulasko 1/6-scale plans up to 1/5, and cut the whole mess for me. I have the matching Fiberglass Specialties cowl & wheelpants. Now I just need to retire, I guess... Haw
Old 01-05-2015, 12:13 PM
  #3670  
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Bought a sherman tank today, and was looking up the real thing on youtube, and found out that a bunch of them had radial engines in them.......awesome sound for a tank

https://www.youtube.com/watch?v=pYsQy3mHV10
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Old 01-18-2015, 09:35 AM
  #3671  
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Check out this awesome Rotary radial engine available from Germany
Perfect for the old WW1 warbirds.

Even a video of it running on thir page:
http://www.modellmotoren.eu/UML%20160.htm

Homepage:
http://www.modellmotoren.eu/index.html




Technische Daten:
160 ccm
Bohrung: 32 mm
Hub: 40 mm
Kraftstoff: Benzin mit 12% Rizinusöl
Drehzahl:700 rpm bis max 3000
Gewicht: Komplett mit Zündung 3840g
Durchmesser: 290mm
Tiefe gemessen Propellernarbe bis Motorträger: 165mm
Propeller Zweiblatt: 32"X14", 30"X18",

Preis: 3400 €


just found a YT video:

https://www.youtube.com/watch?v=jD_mp3Vy9ww
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Last edited by SJN; 01-18-2015 at 09:37 AM.
Old 01-19-2015, 04:41 AM
  #3672  
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Originally Posted by dasquirrelisme
I think I am going to invest in the onboard glow system just to avoid the hassles of the bottom cylinders.

On another note I know a guy that produces the Fred Reese Mystery Ship for the guy that was asking about it earlier. He makes the 1/4 scale which might work with your Moki 150.
Try mixing up to 10% petrol with the methanol,cleans they bottom cylinders up to a nice idle.
Old 01-19-2015, 05:19 AM
  #3673  
Rv7garage
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O.F.- that is crazy, re: the petrol in glow engines. Will this work with single-cylinder glow as well??
Old 01-19-2015, 05:21 AM
  #3674  
Rv7garage
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dasquirrelisme: please PM me with that Mystery Ship info. Thanks
Old 01-19-2015, 08:27 AM
  #3675  
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Originally Posted by SJN
Check out this awesome Rotary radial engine available from Germany
Perfect for the old WW1 warbirds.

Even a video of it running on thir page:
http://www.modellmotoren.eu/UML%20160.htm

Homepage:
http://www.modellmotoren.eu/index.html




Technische Daten:
160 ccm
Bohrung: 32 mm
Hub: 40 mm
Kraftstoff: Benzin mit 12% Rizinusöl
Drehzahl:700 rpm bis max 3000
Gewicht: Komplett mit Zündung 3840g
Durchmesser: 290mm
Tiefe gemessen Propellernarbe bis Motorträger: 165mm
Propeller Zweiblatt: 32"X14", 30"X18",

Preis: 3400 €


just found a YT video:

https://www.youtube.com/watch?v=jD_mp3Vy9ww
Armen de Vries has made tons of awesome engines! And this one is a beaut!

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