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Everything Radial Engines

Old 01-07-2007, 10:45 PM
  #301  
Cybertom
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Default RE: Everything Radial Engines

Looks like he made it so the wings and tail section detach.
Old 01-07-2007, 11:08 PM
  #302  
Kmot
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Default RE: Everything Radial Engines

Whoa!! That is one badd mutha!!
Old 01-11-2007, 09:48 PM
  #303  
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Default RE: Everything Radial Engines

Chasrb,

What is the diameter and length of your Seidel? I would like to compair it to the size of my Robart:

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Old 01-18-2007, 04:14 PM
  #304  
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Default RE: Everything Radial Engines

Hi! I have a Saito 90r3 engine on my 60 Corsair. It is a great engine ,but i can not get my power panel to lit the plugs. So i have used a pocket glow driver ,but it does not last very long.
Do anyone know any smart things to do ,so i can use my power panel. I have a good battery connected to it ,so that should not be the problem.
Old 01-18-2007, 05:28 PM
  #305  
w8ye
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Default RE: Everything Radial Engines

The power panel uses 12 volts and interrupts this voltage intermittently to make a glow plug "glow". When you put three glow plugs paralleled onto the power panel, it does not have enough "on" time to make three glow plugs "glow"

In your case, either three small pocket types are in order or one very large capacity pocket glow driver is in order.
Old 01-18-2007, 08:42 PM
  #306  
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Default RE: Everything Radial Engines

TECHNICAL DATA
Description ST710
Cylinders 7
Total Cylinder 4.174
Cap./C.I.
Cylinder Cap./C.I. .596
Bore/Stroke .88/.98
MaxH.P. 4.0
Weight / lbs 5.7
Ă˜diameter of engine 9.05
RPM Range 1000-6000
Max RPM 6300
Ignition Glow
Glow Plug O.S. F-Type
Prop size (Menz-Type) 22x10
2-blade 22x12
24x8
24x10
Old 01-22-2007, 05:42 PM
  #307  
riph
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Default RE: Everything Radial Engines

Wanted - ASP or Magnum FS 400AR 5cylinder radial engine. Prefer NIB but will consider a used engine. [email protected]
Old 01-23-2007, 01:17 AM
  #308  
Ram-bro
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Default RE: Everything Radial Engines

There is a guy on ebay who sells quite a few of these. I have seen at least 4 sell. That is where I bought mine. This guy is selling the cheap arf warbirds, gliders and jets. I think he goes by the name juelin yang.....or something like that. Good luck
Old 01-23-2007, 12:36 PM
  #309  
riph
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Default RE: Everything Radial Engines

Guys thanks for all the help. I finally found a shop in Hong Kong that sell the Magnum 5 cyl.
A few days ago I saw a post where a new Magnum 5 cyl was being run on a test bench. I can't find the post. Anyone see it and know the location and number??

Thanks,

Riph
Old 01-23-2007, 12:38 PM
  #310  
riph
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Default RE: Everything Radial Engines

Thanks Ram-Bro

Through your lead I was able to find a shop in Hong Kong that sells the motor.

Thanks,

Riph
Old 01-23-2007, 02:19 PM
  #311  
w8ye
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Default RE: Everything Radial Engines

I wasthinking kmot is the guy who posted it but I cannot find it?
Old 01-24-2007, 07:09 AM
  #312  
the Gnome
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Default RE: Everything Radial Engines

Hey, what about these engines? www.standar-engines.de

Here's the same site translated for you English people....

http://translate.google.com/translat...ial%26hs%3DDVM
Old 01-25-2007, 05:49 AM
  #313  
sebthefly
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Default RE: Everything Radial Engines

Hey All!

I have been quietly watching this forum for a while and have decided that the Magnum FS 400AR is the one for me. It will be going into a Polikarpov i 153 gull wing bipe... I have the base plans for the 153 but need the motor before I decide on the exact scale. The money is in the bank and 'she who must be obeyed' has given the nod... so my question to Riph or Ram-Bro is how do i find this shop in Hong Kong? And how much are they asking?

Thanks
Seb
Old 01-25-2007, 09:59 AM
  #314  
w8ye
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Default RE: Everything Radial Engines

This site is not in Hong Kong

http://www.himodel.com/engines/MAGNU..._XL_400-5R.php
Old 01-25-2007, 10:18 AM
  #315  
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Default RE: Everything Radial Engines


ORIGINAL: w8ye

This site is not in Hong Kong

http://www.himodel.com/engines/MAGNU..._XL_400-5R.php

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


What a price! I just wish that I could figure out how to pay for it. Damned astigmatism, makes it impossible to do all of the contortions required to complete the payment process.<G>


Ed Cregger
Old 01-25-2007, 10:24 AM
  #316  
w8ye
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Default RE: Everything Radial Engines

The shipping is $73.10 USD to my house
Old 01-25-2007, 11:27 AM
  #317  
NM2K
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Default RE: Everything Radial Engines


ORIGINAL: w8ye

The shipping is $73.10 USD to my house

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


Apparently, I'm in the order confirmation process at the moment, whatever that is. I haven't paid for it yet.


Ed Cregger
Old 01-25-2007, 12:06 PM
  #318  
Kmot
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Default RE: Everything Radial Engines

FS400AR on test stand:

Part 1:

http://www.youtube.com/watch?v=7fe686Lg4AY

Part 2:

http://www.youtube.com/watch?v=dFB1l9GuvM8
Old 01-25-2007, 05:06 PM
  #319  
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Default RE: Everything Radial Engines


ORIGINAL: Kmot

FS400AR on test stand:

Part 1:

http://www.youtube.com/watch?v=7fe686Lg4AY

Part 2:

http://www.youtube.com/watch?v=dFB1l9GuvM8

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


You're no help at all! <G>

I bought a 50" Sony TV set instead. The radial engine will have to wait a while. A loooooong while.


Ed Cregger

Old 01-25-2007, 05:14 PM
  #320  
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Default RE: Everything Radial Engines

w8ye

Thanks for the info... I started the order process this morning. The all up price came out at US $960.33 including FEDEX to my door and a 4% charge for Paypay payment. They will send me an email today confirming the freight component and I shoud have the motor by Wednesday next week!

Thanks

Seb
Old 01-25-2007, 07:42 PM
  #321  
sebthefly
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Default RE: Everything Radial Engines

Does anyone out there have a dimensioned drawing or a link to a full technical drawing for a magnum 5 cylinder? Now that I have one on order, I'm itching to start on scaling my plans.

On an off topic note
It's a public holiday here in Australia so i went for a fly this morning at my local park (1.5m wingspan electric) and had my luckiest escape ever... the reciever batteries failed on the approach to final... flat and level and it landed itself. OK it cracked the cowling against a fence pole but it could have been so much worse! Best think about double redundancy for the Polikarpov.

Seb
Old 01-25-2007, 07:50 PM
  #322  
Ram-bro
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Default RE: Everything Radial Engines

Glad your getting your Magnum. I think if you look back a few pages you will find a posting for this same info . It has a lead to a Germanwebsite with all the info you could need....I think. So you wanna stick it in a Polikarpof I-16? That will definitely unique airplane.....
Old 01-25-2007, 09:56 PM
  #323  
Cybertom
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Default RE: Everything Radial Engines

Miniature Radial Engine Review

Thinking about all of the miniature radial engines available and what has been happening over the past few years I have made some observations and come to some conclusions. I devised my own rating system on a scale of one to 10 for the characteristics I find important.

RCS 215
This is the most significant radial engine in this list. It’s basically responsible for the tremendous growth in 1/3 scale aircraft. As good as the RCS gas radials is it seems to exemplify the problem of transition. They have an excellent idle, they have an excellent top end, but they sound horrible going from idle to top end. I'm hearing stories that people are having a variety of ignition issues which probably accounts for the poor transition. The RCS 215 has so much power that it can make a 56lb Stearman jump off the ground like a jack rabbit. To fly in a scale manner requires that engine to be throttled way back (not in its sweet spot). This engine produces lots of power...to much power but is reliable. Its existence has spawned a growing list of new 1/3 scale aircraft.

RCS 150
After watching many of the new 1/3 designs fly it is obvious that most of them are extremely over powered by the RCS 215 which is why I believe that the new smaller RCS 150 radial is the key to driving future growth in the 1/3 giant scale aircraft market. The RCS 150 produces a far more appropriate 8HP which delivers around 56lbs of static thrust. Compare that to the 15HP RCS 215 at 80lbs of static thrust. Watch this engine! It's new and has design improvements over the RCS 215. The RCS 150 will become the power plant of choice for 1/3 scale aircraft.

Appearance=7
Operation=7
Reliability=8
Sound=10
Would I buy one=Only the RCS 150


Saito 325R5D
I owned this engine and what impressed me most about it was that it would actually run without glow if adjusted properly. Something that surprised me about this engine was that it was substantially louder than my Robart R780 with only 1/2 the displacement? This engine sounds kind of rough during transition. I did have trouble keeping all 5-cylinders lit consistently during flight which is what I am hearing in many of the videos I have seen. It does have decent idle which may be attributed to the intake impeller. It's strength is it's reliable and runs well with off the shelf glow fuel.

Appearance=6
Operation=7
Reliability=9
Sound=6
Would I buy one=Only if it was placed in a cowled aircraft


Seidel ST770
This engine seems to idle reasonably. The transition is better than the Saito but not as good as the R780. As with the Saito 325R5D it seems like some of this cylinders start to quit in the lower RPM range but not significantly. It doesn't appear to have a particularly wide range of useable throttle but its not bad. The overall reliability and scale appearance are what drives you to buy a Seidel. It also seems to have just the right amount of power for 1/4th scale aircraft (4HP). Now that Ziroli sells them and has parts available brings a certain amount of security here in the USA that wasn't there before. It may not be perfect but its very good.

Appearance=8
Operation=8
Reliability=8
Sound=8
Would I buy one=Yes 7-cyliders, scale and reliable. (best scale engine if you actually plan to fly it)


Robart R780
This engine is the most scale in appearance of any available. It may in fact be the most sophisticated design considering that it has Roller Lifters, Intake Impeller/Compressor, Hemi Head and Pistons, CAM Ring... This engine starts really easy and idles superbly, better than any glow powered radial engine out there. Its transition is excellent with a nice wide range of rpm at your disposal. Oh, and massive amounts of power...maybe to much power (10HP claimed realistically 7-8HP).

Here’s the rub: I went through a really annoying reliability issue with this engine which caused me to damage my Stearman on more than one occasion. The R780 has a 3-piece crankshaft and that's what was causing me grief. The rear portion of the crankshaft shifted its position ever so slightly which caused a variety of issues as you can imagine. Robart fixed it under warranty and changed the design so that the rear portion of the crankshaft is now permanently pinned in place. The engine is in like new condition again. If the crankshaft upgrade holds up this engine will be worth every penny I paid for it. We will see.

Appearance=10
Operation=9
Reliability=3 (until proven reliable)
Sound=9
Would I buy one=Would I buy one again? Only if the problem is truly fixed
Old 01-25-2007, 10:32 PM
  #324  
Ram-bro
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Default RE: Everything Radial Engines

excellent review Tom, hpefully you can add to the list
Old 01-26-2007, 06:41 AM
  #325  
the Gnome
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Default RE: Everything Radial Engines

Yes, very precise description! My experiance is, that good, low rpm idle is no problem with any radial. Problems during transition and full power seem to be caused by ignition timing problems in relation to the type of glow plug (if the carb is adjusted correct). Especially rough running during transition can be caused by too early ignition timing related to high compression ratio or to hot glow plugs.
The relation seems to be quite complex, on my Seidel ST 540 I must run relatively cold plugs to get the timing on full throttle not too early, to get good transition I must lite the plugs up to a little more than 1/2 Throttle.
How ever, mostly I have more problems with lean running at full power.

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