50 size 4 stroke...on a Seagull PC-9?

booke23 · Dec 27, 2006, 06:39 PM

Hi all.

I have just started building my seagull PC-9 and would like to use a 4 stroke motor in it.

I am thinking of an OS FS-52 surpass, or Magnum 52rfs..maybe a thunder tiger 54.

However all these engines are quoted as producing around 0.9 bhp......quite a bit less than say an os 46ax 2 stroke (1.5bhp)

So i am curious if any of you are flying a Pc-9 with one of the above 4 strokes......what is the performance like?

blizzardwarrior7 · Dec 27, 2006, 06:48 PM

I flew mine with a magnum .52 four stroke, and a Evolution .46. Both of them require you to dremel out the mount to get them to fit. You get more speed with the 2 stroke definitely. And the four stroke sticks out the bottom of the cowl quite a bit. I think youll have more fun if you go the 2 stroke route.

rheumatical · Dec 29, 2006, 10:01 AM

flew mine with magnum 52 4stroke and 12x5 prop. Couldnt be happier with the performance.

TSmith4UA · Aug 31, 2009, 04:35 PM

I had an old Enya .40SS in mine and it pulled the mess out of it. Floated in for a landing very nicely with a lighter engine.

lucasavaitor · Aug 31, 2009, 04:54 PM

In my opinion, the horsepower ratings are next to useless. How do you know if it was even tested? It could just be an estimate, or a biased test. Go by displacement size. The 4 strokes will definitely give you enough power.

I TOBOR · Sep 01, 2009, 07:14 AM

Amen Lucas, I think of fourstrokes in terms Flying Power rather than HP and they have it in spades. An OS .52, Saito .56 or an Enya .53 will fly your plane just fine.

Dec 27, 2006, 06:39 PM	#1
booke23 Registered User Joined Dec 2004 25 Posts	50 size 4 stroke...on a Seagull PC-9? Hi all. I have just started building my seagull PC-9 and would like to use a 4 stroke motor in it. I am thinking of an OS FS-52 surpass, or Magnum 52rfs..maybe a thunder tiger 54. However all these engines are quoted as producing around 0.9 bhp......quite a bit less than say an os 46ax 2 stroke (1.5bhp) So i am curious if any of you are flying a Pc-9 with one of the above 4 strokes......what is the performance like?

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Dec 27, 2006, 06:48 PM	#2
blizzardwarrior7 In Massive Debt Northampton Massachussetts Joined Jun 2005 2,001 Posts	I flew mine with a magnum .52 four stroke, and a Evolution .46. Both of them require you to dremel out the mount to get them to fit. You get more speed with the 2 stroke definitely. And the four stroke sticks out the bottom of the cowl quite a bit. I think youll have more fun if you go the 2 stroke route.

Dec 29, 2006, 10:01 AM	#3
rheumatical Registered User Naperville, IL Joined Sep 2005 109 Posts	flew mine with magnum 52 4stroke and 12x5 prop. Couldnt be happier with the performance.

Aug 31, 2009, 04:35 PM	#4
TSmith4UA Pull up, unless inverted! Lincoln, AL Joined Jul 2009 3 Posts	I had an old Enya .40SS in mine and it pulled the mess out of it. Floated in for a landing very nicely with a lighter engine.

Aug 31, 2009, 04:54 PM	#5
lucasavaitor Registered User Joined Aug 2008 1,015 Posts	In my opinion, the horsepower ratings are next to useless. How do you know if it was even tested? It could just be an estimate, or a biased test. Go by displacement size. The 4 strokes will definitely give you enough power.

Sep 01, 2009, 07:14 AM	#6
I TOBOR Registered User Joined Feb 2007 2,251 Posts	Amen Lucas, I think of fourstrokes in terms Flying Power rather than HP and they have it in spades. An OS .52, Saito .56 or an Enya .53 will fly your plane just fine.