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Everything Radial Engines

Old 12-09-2012, 02:20 PM
  #3476  
Propworn
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Default RE: Everything Radial Engines

1000 rpm just to start?????? That is way out of line for a radial that is supposed to be hand started. Any radial I have seen or have started did so with an easy flip. To me it sounds like there is something not just right. A quick look at the site it says it has electronic ignition so it should easily fire when hand rotated. That motor is a suction intake in the piston and a cammed exhaust on the cylinder head if I am not mistaken. It sounds to me like the rings are not sealing properly and the suction intake is not letting fuel into the cylinder. Increasing the rpm for starting would increase the suction and the intake valve opens allowing fuel into the combustion chamber. Much like a 2 stroke with poor crank seals. If it’s cranked over to slow it doesn't start because of the air leaks but spin it with an electric starter and it will fire up and run. It may get better once the rings seat but I personally would be cautious about accepting an engine I could not hand start.

Dennis
Old 12-10-2012, 02:02 AM
  #3477  
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Default RE: Everything Radial Engines

It also sounds like there is an issue as rotary engines were all hand started, even the 1/3 scale ones. although it's a 2 person job to juggle the ignition, it needs to be retarded then advanced as the revs rise - no throttle only ignition cutout to vary power....
Old 12-11-2012, 10:39 AM
  #3478  
the Gnome
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Default RE: Everything Radial Engines

Tanks for Your suggestions, of course I know that the engine has a problem, but, it could be that, especially the Monosoupape with its slots and chanels in the cylinder wall to load cylinder, the engine needs some speed to get gas transfer into action. I have seen videos on Youtube of a Vickers Gunbus with Monosoupape, that is started with electric starter.

Of course, 1000Rpm is a bit high, but I cannot believe that bad sealing piston rings can cause this problem, there must be anything else.

I just hoped that somebody of You folks has seen a Replica Engines Gnome running or, may be, flying...

Jens

Holm und Rippenbruch
Old 02-03-2013, 02:19 PM
  #3479  
Heli-NuBee
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Default RE: Everything Radial Engines

I flew my Saito 200 R3 radial engine powered Seagull Sea Fury again today. This is an awsome combination. The plane and engine perform very well.

Best wishes and good safe flying,

Roger the radial rabbit.
Old 02-17-2013, 09:26 AM
  #3480  
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Default RE: Everything Radial Engines

Guys i will buy my radial...moki 250 or evolution 260?
I am watching a few videos and i think moki sound is great...
What you can saying about?
Old 02-19-2013, 01:07 AM
  #3481  
tech.knockout
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Default RE: Everything Radial Engines

I'd like to use a radial engine for a bike or go kart, the engine will be out in the open air. Bad idea in terms of air cooling issues? If so, what makes these engines different from lawnmower/weedwacker engines? (which have no cooling system besides the fins, plus the engines are surrounded by plastic casing and auxilaries, which I imagine makes things worse)
Old 02-27-2013, 06:52 AM
  #3482  
Maxam
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Default RE: Everything Radial Engines

Have any of you been to Oshkosh Air Venture? This year the radial engine is featured! I have been several times even though I do not have a full size plane. I will definitly go this year! You can stay cheaply at the nearby university in the dorm rooms if they have not been sold out yet. Oshkosh is very motivating to get you to build a scale plane!
Old 02-27-2013, 08:02 AM
  #3483  
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Default RE: Everything Radial Engines

I've been to Oshkosh Air Venture two times 2009 and 2012. Last year we camped in a tent on the Air Venture grounds but it was very hot. If you stay in one of the dorms get one with AC not all of them have it.
Old 02-27-2013, 08:43 AM
  #3484  
Maxam
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Default RE: Everything Radial Engines

We did get a room with AC ! Thanks for the heads up though!
Old 02-28-2013, 03:04 AM
  #3485  
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Default RE: Everything Radial Engines

HI,
A radial engine in a Go Kart... sounds like an awesome idea, what concerns me a little though is the cost. A radial engine in a 50cc size starts at $1000 the most expensive Line trimmer engine I've found is a Honda 4 stroke at $600. You can get a 2 stroke engine from the tip for $5.

A second hand mower engine which is 125cc to 200cc is going to be anywhere from $50 (2nd hand mower shop) to $299 + from Bunnings etc for a new one.

A radial needs additional cooling, so some form of 'fan' and a shroud to keep the air flowing through the fins. A mower or trimmer engine will run ok as a stationary engine so won't need much of a shroud but you need to keep in mind airflow will need to maintain the temperature so the engine doesn't seize.

A gokart etc, will need a clutch of some sort to help with the gearing, there are a lot of sites where you can get info to build one or buy one, ( A mini bike is a good source of parts - gears etc...)..

The radial engine - moki etc would be about $3000....

Good luck with which ever choice you make.

Old 02-28-2013, 04:09 AM
  #3486  
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Default RE: Everything Radial Engines

use a turbine.. much easier and dont have a prop do hurt someone...
Old 02-28-2013, 10:27 AM
  #3487  
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Default RE: Everything Radial Engines

Here is an UMS/Siedel in a pocket bike......not too impressed with it

http://www.youtube.com/watch?v=0z2KBHHLk4s


[youtube]http://www.youtube.com/watch?v=0z2KBHHLk4s[/youtube]
Old 02-28-2013, 12:07 PM
  #3488  
retransit
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Default RE: Everything Radial Engines

SJN, how about this one?

[youtube]http://www.youtube.com/watch?v=GUx35zuI5GI[/youtube]

Bob
Old 03-17-2013, 10:35 AM
  #3489  
Heli-NuBee
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Default RE: Everything Radial Engines

I recently aquired a Saito 450 R3 radial engine in a trade deal. I am now the proud owner of four radial engines. An UMS Evolution 777, a ASP 400, a Saito 200 R3 and now a Saito 450 R3. I plan to install the 450 in an 85" Gilmore Red Lion racer.

Heli-NuBee (AKA Roger the radial rabbit)

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Old 03-17-2013, 02:33 PM
  #3490  
gesmale
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Default RE: Everything Radial Engines

Acquired a Seidel 540 at an estate sale. Anyone out there with tips on operation, valve adjustment and any other good info to keep me out of trouble. Thanks
Old 03-17-2013, 04:05 PM
  #3491  
Maxam
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Default RE: Everything Radial Engines

I have one! I do have all manuals info etc. Has yours been run? -Tom
Old 03-17-2013, 07:20 PM
  #3492  
gesmale
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Tom, It was mounted in an airplane and appears to have some time on it. I got it from an estate sale but no other info was available. It was one of those deals where a friend was trying to help out the widow. I will be happy to reinburse you for your time and effort. Since information and parts seem to be hard to come by, I don't want to mess things up because of a lack of knowledge. Thanks in advance for your help. George
Old 03-18-2013, 03:12 AM
  #3493  
Maxam
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Default RE: Everything Radial Engines

George, That engine is "special" because the 540 was a limited edition engine vs the 7 and 9 cylinder ones. I will be happy to send you copies of all pertinent information. Please find my thread under evolution radial opeation and maintenence. I have posted a great deal of information that appies to your engine. You are correct in that parts might be difficult to obtain. Your first step is to flood the engine with air tool oil and remove the glow plugs to drain excess oil and not hydraulically lock any cylinders. -Tom
Old 03-24-2013, 06:02 PM
  #3494  
Heli-NuBee
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Default RE: Everything Radial Engines

The BH Gilmore build is going quickly. The wing is complete already. I ordered a Keleco exhaust ring and a Microsens on board glow system for the Saito 450. I can't hardly wait to fire up the 450 for the first time.

Best wishes and good safe flying.

Heli-NuBee (AKA Roger the radial rabbit)
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Old 03-26-2013, 11:32 AM
  #3495  
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Default RE: Everything Radial Engines

Have you guys seen this 1/5 scale Pratt & Whitney R-2800? [X(]

http://pegasusengine.com/Authentic-S...-2800-200.html

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Old 03-26-2013, 12:33 PM
  #3496  
Maxam
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Default RE: Everything Radial Engines

Hey Tom, I have seen the website and the engine at Toledo. On the website it says add to shopping cart indicating it is available. The price is relatively low. I wonder if it really is. Sure looks good! -Tom
Old 03-26-2013, 04:01 PM
  #3497  
Heli-NuBee
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Default RE: Everything Radial Engines

I completed the empanage today. The elevator and rudder are functional and adjusted to the manual specs. Not much more I can do now until the on board glow system and exhaust ring arrive. Then I can proceed with installing the engine and fuel system.

Best wishes and good safe flying.

Heli-NuBee (AKA Roger the radial rabbit)

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Old 03-26-2013, 04:31 PM
  #3498  
gesmale
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Default RE: Everything Radial Engines

Roger, You know the real one that Rosco Turner flew is in a museum in Cleveland. Saw it years ago and could not believe how small it was. george
Old 03-27-2013, 05:10 AM
  #3499  
Heli-NuBee
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Default RE: Everything Radial Engines

Hey thanks George, I would love to see the real Gilmore racer.

Heli-NuBee (AKA Roger the radial rabbit)
Old 04-02-2013, 02:20 PM
  #3500  
Heli-NuBee
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Default RE: Everything Radial Engines

I received my engine standoffs late yesterday and made a little progress with installing my 400 in the CMP Zero. I am still waiting for the Microsens on board glow system but it should arrive any day now. Progress is slow but the project is moving forward.

Heli-NuBee (AKA Roger the radial rabbit)

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