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Everything Radial Engines

Old 12-03-2007, 01:53 PM
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Default RE: Everything Radial Engines

Gilles,

I am running Byrons 15% nitro with 20% oil in mine. I broke the motor in on Byrons 10% nitro with 20% oil. I have not tried any other brand since everything has been superb since opening the box. My LHS is carrying this brand.

Jeff
Old 12-03-2007, 01:58 PM
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Default RE: Everything Radial Engines

I run PowerMaster 20/20 and OS F plugs , 20x8 laminated wood prop with good results



Zagi_X
Old 12-03-2007, 02:28 PM
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Default RE: Everything Radial Engines

I have a Saito 56 and two Saito 150s. They run nicely on just about any 15% nitro fuel. I commonly use Performance Plus, Powermaster, and Omega. The 150s are real "stump-pullers". A while back, Horizon Hobby was suggesting even higher nitro contents, like 20 to 30%, if you needed more power. I won a jug of 25% at a raffle, and will try it some time.

My new 1/4 scale Consolidated PT-6A (military version of the Fleet Model 2 Biplane) will probably use a JAG Ryobi 31cc inverted gas engine. By moving it back to the scale firewall and extending the prop drive hub, I can just about hide it in the fuselage. I will use Williams Brothers 1/4 scale Wright Whirlwind J-5 dummy cylinders, turned around and modified, to simulate the 5 exposed cylinders of the Kinner 100 HP engine in the full-scale. This engine has the pushrods in the rear and exhaust stacks in the front, so it does not resemble any of the available 5-cylinder model engines.

The model is being built from a modified Concept Models kit for the 1/4 scale Fleet Model 2. This kit has been around since 1977, and over 3000 have been sold. The beautifully restored full scale PT-6A is in a the March Field Air Museum in Riverside, CA, where I work as a volunteer, so I have good access for measurements and photos. The model is being built for serious Scale Masters Competition, so a reliable engine is essential.
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Old 12-03-2007, 03:48 PM
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Default RE: Everything Radial Engines

Saitos love 30% Omega cool power. I have a .56 with 800 hrs on it and is just now due for an overhaul....the jug finally let go of it's mounting on the crank shearing off two bolts and chipping the right front off. She'll be up and running once again.
Old 12-03-2007, 04:42 PM
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Default RE: Everything Radial Engines

Sounds like it's time to just get yourself a new 62 and use the old 56 just for parts?

It would be cheaper to buy a new engine and sell parts off the old engine?
Old 12-03-2007, 05:30 PM
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Default RE: Everything Radial Engines

Hi all,

Interesting to read you. In Switzerland, we usually don't run airplanes engines with more than 10% nitro. You guys don't seem to run your engines under 15%, that's a huge difference of practice !

Maybe the pice of nitro is the reason.

Gilles
Old 12-03-2007, 05:53 PM
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Default RE: Everything Radial Engines

I have a few Saitos and so do the rest of my warbird formation team. Most have Saito 100's in their Hanger 9 warbirds (We love 'em!). Me, I have my old Ez zero and .56. with 30% I'm al least as fast as the rest of the group....usually, faster by a good bit thanks to a small frontal area of the smaller plane and it's relatively higher wing loading (8.6 to 9 lbs if I'm carrying smoke). Put the nose down and I'm gone! Soon that plane and engine will be replaced with KMP 60 sized Spitfire with RCV 120SP. Currently being built for spring maiden.
Old 12-03-2007, 07:51 PM
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Default RE: Everything Radial Engines


ORIGINAL: gdutruy

Hi all,

Interesting to read you. In Switzerland, we usually don't run airplanes engines with more than 10% nitro. You guys don't seem to run your engines under 15%, that's a huge difference of practice !

Maybe the pice of nitro is the reason.

Gilles

----------------


That and the fact that higher nitro fuels broadens needle settings, meaning that you don't have to be a real engine tuner in order to fly. Just get it somewhat close and it will usually run with enough nitro.

Myself, I like the settings to remain somewhat consistent throughout the flight. So, I tend to favor lower nitro fuel because the fuel consumption rate is reduced considerably, meaning that the pressure head of the fuel tank will not change as much throughout the flight, which means that the change in pressure seen at the carb spray bar doesn't change as much as when burning high nitro fuel. The latter adds to reliability/less deadsticks. The onboard glow ignition system also helps in reducing the "need" for higher nitro fuels.


Ed Cregger
Old 12-03-2007, 09:21 PM
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Default RE: Everything Radial Engines

Gilles- I suspect that RCU is not a real cross section of the hobby over here. I know that I see a lot of 5 and 10% fuel at the few hobby shops that I go to. Still, I had the same impression as you for a while until I saw how much low nitro fuel is sold around here.
Old 12-07-2007, 11:48 PM
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Default RE: Everything Radial Engines

Another u-toob video. This of a giant scale Gee Bee "Y" with a "Penta 54".

http://youtube.com/watch?v=IVWHl6d_SQ0

http://www.brownbearmotors.nl/
Old 12-16-2007, 02:48 PM
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Default RE: Everything Radial Engines

Hi guys

Seidel st-14-500 to sell on ebay germany... any of you has enough friends to put them together to find the 5900ÔéČ for christmas !!!

http://cgi.ebay.de/Seidel-14-Zyl-Dop...QQcmdZViewItem

Gilles
Old 12-16-2007, 11:26 PM
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That's only $8522 dollars. Come on Steve, pony up!
Old 12-18-2007, 12:15 AM
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Default RE: Everything Radial Engines

Would anyone be interested in a trade? I have a Kavan FK50 Mark I, 50cc 4-cycle twin, updated to Mark II standards. It is in good condition, runs nicely. It flies a 40 pound 1/3 Scale Cub on floats. It comes with the original box and instructions, motor mount, display stand, and two extra cylinders.

I would like to trade for a Saito 5-cylinder engine in similar good condition, and as complete.
Old 12-18-2007, 09:53 AM
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Default RE: Everything Radial Engines

Seidel ST 14-500 : Does any of you know if this beast have ever been mounted to a plane and flown..?

Or, have anyone ever heard one run..? 5900ÔéČ is a bit out of my budget, but one sweet day :-)


Happy x-mast everyone..


Best regards..

Sandman
Old 12-18-2007, 02:16 PM
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Default RE: Everything Radial Engines

Hey Sandman, there was an article in an aero modellers magazine about 3 years ago from an engine collector, who wrote about the engine and the running in procedure. I remember, that starting the new engine could only be achieved by using a 700 Watt hand drill, because inner friction was too high to turn it fast enough by hand or other means. The primering procedure also was tricky because of the very large crankcase. The author claimed it was really difficult to be brave enough to rev the engine higher than 3k, the propeller wind was like the wolf blowing the little pigs house.

gnome

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Old 12-19-2007, 12:33 PM
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Default RE: Everything Radial Engines

Hey Gnome,

Are the engines on the picture yours ?

Gilles
Old 12-19-2007, 05:40 PM
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Default RE: Everything Radial Engines

OOOhhhhhhhh no, Gilles, that would be out of my budget too!!!!!!!! I ,only, could afford a ST710 and a ST540.

I took the pictures at the MECA meeting here in germany last year, it's a very nice anual meeting that regular takes place in the begining of september in a wine resturant in deep hessen. I only can give the advice to try to make a visit next year, they always show a full scale aircraft engine running, normally a rotary radial of WW1 or pre war period.

May I direkt Your interest on the new Seidel website? www.sternmotoren.eu Seidel starts a new try with gas radial engines!

gnome

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Old 12-20-2007, 01:26 AM
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Default RE: Everything Radial Engines

Wow! A 700cc 7-cylinder! [X(]



Anzahl Zylinder 7
Treibstoff Benzin, Mix 1:50
Hubraum 700 ccm
Leistung 30/40 KW/PS
Gewicht 15 Kg
Einbauma├če (├ś x Tiefe) Benzin 440 x 230 mm
Geeignete Luftschrauben
2-Blatt 42 x 20, 42 x 22
3-Blatt 40 x 18
geeignet f├╝r Modelle bis Gro├čmodelle und auch div. andere Anwendungen
Lieferdatum (vorausichtlich) Herbst 2008
Preis (voraussichtlich)
inkl. Z├╝ndung Benzin inkl Z├╝ndung: ca. 6.480 Euro

Preise sind inkl. ges. MwSt und exklusive Versand- und Verpackungskosten
Old 12-20-2007, 03:06 AM
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Default RE: Everything Radial Engines

"div. andere Anwendungen" means "for several other purpose", I talked to Mr. Seidel several times about this engine, that purpose, he claims, should be the power for parasuit flyers, full scale, of course.

Imagine a man with this mighty engine on his back! I really would like to see this...

gnome

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Old 12-20-2007, 10:23 AM
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Default RE: Everything Radial Engines

Thanks Gnome,

I was wondering what seidel was doing as is old website has never been really in use (seidel-triebwerke.de oder etwas so).

This meca meeting is interesting. i would really like to see the 14-500 running (maybe flying if someone dare to do it....)

Gilles
Old 12-21-2007, 01:25 AM
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Default RE: Everything Radial Engines

I have found some excellent radial engine model airplanes in video. Moki and Seidel powered. Enjoy!

http://www.rcmovie.de/view_video.php...23f9620c1d09c0

http://www.rcmovie.de/view_video.php...8150a60844bb94

http://www.rcmovie.de/view_video.php...8428a4a024feb0

http://www.rcmovie.de/view_video.php...b13e93d1c8f310

http://www.rcmovie.de/view_video.php...38371ec0d5df81

http://www.rcmovie.de/view_video.php...b6050c2a564435

http://www.rcmovie.de/view_video.php...1c1494cdfcd6dc

http://www.rcmovie.de/view_video.php?viewkey=820900592

http://www.rcmovie.de/view_video.php?viewkey=1263620527

Old 12-21-2007, 09:34 AM
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Default RE: Everything Radial Engines

Thanks Kmot .......nice vids
Old 12-21-2007, 06:36 PM
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Default RE: Everything Radial Engines

Hi all

I have been following this thread since it began but this is my first post. I have just sold my full size Pitts S1S and promised myself once sold I would buy a Seidel 726 for my next RC project.

After seeing the new Seidel website I am now a little concerned the 726 may be no longer available[&o]. The diameter of the 726 would have suited my proposed projects perfectly. I see the new 7-250-B is writen as 3150x190 mm on the new website, assuming this is a typo and 315mm diameter is what was ment. This new engine would appear to be 15mm smaller then the 726 at 330mm dia.

Could someone please shed some light on this for me and perhaps point me in the best direction to purchase a 726 or 7-250-B (if the diameter is 330mm not 315mm)

I would like to go gas if I had the choice but Methanol would be ok as well.

This engne in my hands will see alot of air time as do all my engines. I have almost worn out my old OS 300 Gemini flying it almost every weekend for the past ten years in my 1/3 scale Pitts S1S.

Cheers Craige


Old 12-25-2007, 10:34 PM
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Default RE: Everything Radial Engines

Looking for some help and advice. I have the opportunity to purchase a Seidel 540 5 cylinder radial on glow. Original owner has misplaced papers so I am lookiing to find out fuel requirements ( nitro and oil type/content ), recommended prop sizes and rpm and any other information I can get. Engine is new in the box, I believe it is 2.38 cu in and has exposed rockers and pushrods. A real work of art. Thanks in advance........Ed M.
Old 12-26-2007, 03:53 AM
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Default RE: Everything Radial Engines

Hello flht99b, the original owners manual of my ST540 sais:

rev. range: 1100 - 6800

prop size 2 blade: 18x8, 18x10, 20x6, 20x8, 22x6

prop size 3 blade: 16x8, 16x9, 16x10, 17x8, 17x9

glow plugs: ENYA 3, KAVAN black speed, BUCO 18 hot

fuel:
minimum oil 10%, nitro 5 - 10% (Mr. Seidel told me on telephone, oil should be 8 - 10%, 0% nitro)

running in: about 2 hours at 12 - 15% oil, revs around 3000 for the first hour

To my experiance it's very important that the prop is not too big, with a 22x8 2-blade there occures massive pinking (at 4800rpm max). Too, the glow plug should not be too hot, on OS F type plugs the biggest 2 blade prop that works is 19x6.

Hope this helps..


gnome

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