RE: SK ENGINES

RE: SK ENGINES
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RE: SK ENGINES - 7/27/2007 4:37:31 AM

XJet

Posts: 3462
Joined: 3/31/2003
From: Tokoroa, NEW ZEALAND
Status: online

quote:

ORIGINAL: vasek

XJet, why do you keep feeding us with long technical analysis when WE ALL KNOW YOU DON"T KNOW WHAT YOU"RE TALKING ABOUT (just read your own posts and leave this thread alone pls)

thank you,
Vasek

My humble apologies, I didn't realise you were authorized to speak on behalf of the rest of the world or that your knowledge was so vastly superior to my own.

I thought these forums were for the exchange of information, opinion, knowledge and experience. My mistake.

If *NOBODY* wants to read what I write or my findings then I'll take my observations, tests and results elsewhere. Sorry to have wasted the time of *ALL* those on whose behalf you are entitled to speak.

There's clearly no place *here* for someone who dares bring facts into a discussion.

Exits stage left.

_____________________________

When I'm not here, I'm at RCModelReviews

(in reply to vasek)

Post #: 326

RE: SK ENGINES - 7/27/2007 5:00:08 AM

fiery

Posts: 1010
Joined: 2/2/2002
From: Hervey Bay Queensland, AUSTRALIA
Status: offline

Maybe this thread can be renamed "Club SK" ?

(in reply to XJet)

Post #: 327

RE: SK ENGINES - 7/27/2007 6:55:44 AM

Turk1

Posts: 645
Joined: 10/8/2004
From: Istanbul, TURKEY
Status: offline

XJet,please dont give up.Sure here is an arena to be aware of many different opinions and knowledge.Sometimes opinions having some tension but should not be a problem.I want to read your experiments, tests and opinions.

(in reply to fiery)

Post #: 328

RE: SK ENGINES - 7/27/2007 8:40:48 AM

TestPilot6

Posts: 84
Joined: 9/18/2005
From: San Francisco, CA, USA
Status: offline

ditto

(in reply to Turk1)

Post #: 329

RE: SK ENGINES - 7/27/2007 2:40:04 PM

vasek

Posts: 1996
Joined: 1/24/2002
From: centre, QC, CANADA
Status: offline

Xjet, unless i missed something you are NOT solely expressing your opinion but rather attacking a engine maker with arrogant and false statements such as (taken from your post no. 303):

"And there's an example of why it's stupid to taper a bore when you're not using the best materials or machining accuracy."

BEFORE making such bold & arrogant statements about a engine manufacturer i would MAKE SURE i understand the complex principles of an engine fabrication WHICH YOU ARE OBVIOUSLY LACKING!

That is why i spoke out.
OVER&OUT

quote:

ORIGINAL: XJet

My humble apologies, I didn't realise you were authorized to speak on behalf of the rest of the world or that your knowledge was so vastly superior to my own.

I thought these forums were for the exchange of information, opinion, knowledge and experience. My mistake.

If *NOBODY* wants to read what I write or my findings then I'll take my observations, tests and results elsewhere. Sorry to have wasted the time of *ALL* those on whose behalf you are entitled to speak.

There's clearly no place *here* for someone who dares bring facts into a discussion.

Exits stage left.

_____________________________

I am a proud Canadian >living in Europe;-)

(in reply to XJet)

Post #: 330

RE: SK ENGINES - 7/27/2007 6:51:18 PM

rsad

Posts: 19
Joined: 11/22/2004
From: Westport, MA, USA
Status: offline

Well this is probably off topic again but I got to break in my new SK 90 this morning. Burned through one gallon of fuel breaking it in. When I ran out of that FAI stuff mixed with a little 15% sport fuel, I switched over to 15% sport fuel and started to fly. I can say that this motor loves the bigger props. The 13x6 just revs too high after breaking it in and I just couldn't get it set correctly......it seemed to lean out at the high rpms wit the small prop. So, I switched to the prop sizes that Ray Nano told me to use during our phone conversation. So far I have flown my Robinhood 80 with a 15x6MA, 15x8MA, and 14x6x10Zinger (this prop wasn't suggested but I tried it since I had it). This engine, SO FAR, is great. I am real happy with this $99 engine. It pulls the plane around with authority and now it climbs knife edge. It probably is still breaking in also. Electric starter not needed...prime, connect glow clip, one flip and it starts.

I am going to order the 1.30 later today and try that on the Robinhood when it comes in. So that's my experience with SK! I plan to fly the 90 all weekend, weather permitting. Hopefully I will still be happy with the engine.

I aLways have been an OS fan but now I guess I can save a bunch of money!
Rick

< Message edited by rsad -- 7/27/2007 6:53:34 PM >

(in reply to vasek)

Post #: 331

RE: SK ENGINES - 7/27/2007 7:20:39 PM

cloudsurfer

Posts: 7
Joined: 5/1/2004
From: Wantage, NJ, USA
Status: offline

Xjet, there are 17 pages of people who like SK engines and you come along and tell us you would rather spend $10 more on a good engine. I have 3 SK's a 50 a 80 and a 90 and have never had any trouble with any. The one time I did contact Kangke tech support it took Ray Nano about 30 seconds to determine my problem was a bad glow plug. The engine is in a Super Sportster and as it happens Ray also has one. He then spent the next 30 minutes walking me through the set up of mixes in my Hitec transmitter to get the best from the airframe, and it's not even a kangke airframe. There is no basis for your slamming a company that tries that hard. You have never owned one and even if you don't understand why they do things the way they do, it doesn't make you right and them wrong. Saying things like it's stupid to do it that way just makes you look like an ass to all of us that like the product. Try one first then come back and tell us about your experience, not your suppositions. Until you have experience your opinions are without value, do not help others with thier engines, thats why we all read these threads. Come back when you have something useful to add.

(in reply to rsad)

Post #: 332

RE: SK ENGINES - 7/27/2007 7:58:03 PM

OUTCAST

Posts: 880
Joined: 1/5/2002
From: ., NJ, USA
Status: offline

What make props are you guys running on your 90's, I'm using an APC 15/6 it seems to be a good combo, pulls like crazy.
I was curious what others think of their props.

(in reply to cloudsurfer)

Post #: 333

RE: SK ENGINES - 7/27/2007 8:08:33 PM

Ed Cregger

Posts: 7744
Joined: 1/31/2002
From: Ringgold, GA, USA
Status: offline

quote:

ORIGINAL: fiery

Maybe this thread can be renamed "Club SK" ?

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

Not a bad idea, actually.

Ed Cregger

_____________________________

Artisan

"Flying models since the Fifties - I'll get the hang of this yet!!!"

(in reply to fiery)

Post #: 334

RE: SK ENGINES - 7/27/2007 8:10:15 PM

Ed Cregger

Posts: 7744
Joined: 1/31/2002
From: Ringgold, GA, USA
Status: offline

quote:

ORIGINAL: Turk1

XJet,please dont give up.Sure here is an arena to be aware of many different opinions and knowledge.Sometimes opinions having some tension but should not be a problem.I want to read your experiments, tests and opinions.

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

I agree with you, Turk1. There is room for everyone.

We should remember that all of the information offered here is just someone's opinion. <G>

Ed Cregger

_____________________________

Artisan

"Flying models since the Fifties - I'll get the hang of this yet!!!"

(in reply to Turk1)

Post #: 335

RE: SK ENGINES - 7/27/2007 8:52:07 PM

Cambo

Posts: 1516
Joined: 6/20/2005
From: Phoenix, AZ, USA
Status: offline

I said it before and i will say it again

I LOVE MY SK 91
It is a 3d pilots dream, big props, high torque, without the pricy cost of 4 strokes!
On the same prop my sk puts out about 300 rpms less than a saito 125 on 30% (at least from the tach readings i have seen) . Not bad for a 91 on 5%

This should be nammed Club SK

I would like to hear some muffler solutions. I would like my muffler to be slightly less weight

I have a tower 75 muffler that i will try, will keep you posted

Just FYI,
Kangke pitts didn't work well at all, bad back pressure problem.
Slimline OS 91 FX pitts muffler worked better but still had bad back pressure problems (couldn't hold rpm in hover)
the Muffler thread/whole dimension of the os 91 fx are the same as the sk 91

My favorite prop
15-6

Best glow plug so far
os 8

Runs best on 5% IMO

(in reply to Ed Cregger)

Post #: 336

RE: SK ENGINES - 7/27/2007 10:22:50 PM

Jim Dines

Posts: 1373
Joined: 2/27/2002
From: Keller, TX, USA
Status: offline

15X6 prop is what I use on my Mag 91 2 stroke on my Edge 540. It is a good combination, and I believe this is about the maximum prop my engine wants to turn. Your SK will probably handle more prop. I recall one of Ed Mooreman's writings in which he stated 15X6 as the "minimum" prop for the SK 91. It's got me thinking.

(in reply to Cambo)

Post #: 337

RE: SK ENGINES - 7/27/2007 10:51:18 PM

Ed_Moorman

Posts: 3684
Joined: 1/5/2002
From: Shalimar, FL, USA
Status: offline

The 15-6 as a minimun size prop is what I gleaned from the original thread on SK and from Ray Nano.

I bought my first .91 after reading the thread here and from the great comments, especially from Turk1 on his 50s. After flying my first .91, I ordered a second one and a .52 (they call it a 50). I had been flying a lot of OS with several other brands, too. Except for the dragging carb barrel, which I fixed with a file on the end of the groove, I can say nothing bad about the brand.

I have been thinking about gettng another .52 to use on a twin, and normally I never use anything but OS because of the reliability factors. And believe me, I have tried others. My SKs have been super reliable, 1-flip starters, and very economical to run. They aren't screamers, but I have other engines for that.

In my opinion, the carb design is excellent. The manufacturing is a little off on some of them and I am sure Kangke is working to get that fixed. It has an excellent idle, the mid range is right on and the top end is good. Much, much better than Magnum, for example.

I should probably run my OS .46AX, my OS .55AX and my SK 50 all on a 12-5 and compare. Maybe also do an 11-7 and a 12-6. The 55 seems to run well on the 11-7.

_____________________________

Ed Moorman, AMA 553, KD4QBM, Revver Bro #156
R/C Report Magazine, Fun Aerobatics Column

(in reply to Jim Dines)

Post #: 338

RE: SK ENGINES - 7/27/2007 11:56:56 PM

Jezmo

Posts: 823
Joined: 6/26/2006
From: Spring, TX, USA
Status: offline

I came here looking to glean some information about the SK 50. I noticed that it is mentioned everyone should be able to offer their opinions, experiences, etc. I agree, however, one caveat. If what you are writing is opinion, please state that so others like myself looking for solid facts will be able to distinguish. I know for certain that at least one post is purely opinion and it comes across as if the person is stating facts and that could be misleading. I don't think this particular poster would knowingly mislead, however, some of the information in these posts is misleading. If you don't own the engine, or have some other first hand experience with it, it might be better to state - This is my opinion on the matter - just so dummies like myself don't get confused. Just my two cents.

< Message edited by Jezmo -- 7/27/2007 11:58:45 PM >

_____________________________

Raptor 50 V2 OS 50 Hyper, T-Rex 450XL CDE, Spektrum DX7, SuperTigre OS FOX Saito Enya Jett TT

(in reply to Ed_Moorman)

Post #: 339

RE: SK ENGINES - 7/28/2007 12:15:06 AM

rsad