Rotax 670 on ebay

[skyguynca]

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=26355&item=7140621796&rd=1

not a bad price $1200.00 buy it now price, bidding is at $1000.00

[GyroRon]

Please tell us who you know who has flown one of these successfully for any significant period of time. Everyone I know who has tried to use one for powering a aircraft has been lucky to get 50 hours before failure.

[skyguynca]

Eric Klondstadt in Pitt Meadows has one in his 2 seat fixed wing, 143 hrs and counting with the only problem was a gear box one. Brent is putting one on his 2 seat gyro so now I know 2 people. u?

[GyroRon]

Brent.... key word is Putting. As in no time on it yet.

As for me, just ask Ernie Boyette about the 670.... or Russ King....

[Victor Duarte]

David, i asked for info about the 670 to my hovercraft friend..
he was between good and bad.. some holded a long time while others had a lot of problems, he compared them to Arrow engines..that says it all).
When i asked to jetski guys, the rotax have a bad reputation vs japanese engines...
Thanks

[scottessex]

Arrow should have changed thier name to "dirt dart". :cool:

Sorry But I owned one,
I would hope that the 670 is more reliable, was the 670 a sled engine? or was it for ultralights?

[Victor Duarte]

Scott,
i have not much precision, it seems that they were from sled, and their reliability depended IMO on the redrive mount.. that explains that some lasted, some failed.
agreed about the arrow... even me, i don't want one, i prefer wait and buy something japanese :D

[skyguynca]

They ones I have seen with problems were related to the redrives. Cracking cases, breaking cranks.....the ones I have seen running without problems were using clutches and the zanottea (I know the spelling is wrong) boxes with luck. The C and E boxes just could not handle the power pulses..oh and the ones that are working also used that fluid harmonic dampner.

.......Ron why is it that you just luv to put things down?????? or is it just ME that you want to put down? Your are so confrontational. I know that is a subject for another thread but it seems to me that all you do is put people or things down that don't fit into your ideal world. I know alot of people who swear all Rotax's are bad, but you know what, all I have flown behind work beautifully......then there were all they guys on the old forum who told me my Mac would sieze, it would quit, it was the worst engine out there, but you know what it never happened. Rick Whittedge told me how to take care of it and run it, guess what...darn good engine also. Just because you heard or were told something doesn't mean it is right in every circumstance. The world moves, the sun sets, the tide ebbs, and things will work with patience and effort. Ron be happy people don't give up, if they did the gyro would have died and dissapeared along time ago, Rotax would have never had a aircraft engine, and computers would have just been a fad.

Oh and this was posted on here because I could not remember who asked me that the next time I saw one on ebay to let them know. Me, I have no use for that much power.

Ron does this mean your going to keep telling Brent it is impossible, that he needs to give up and not try it? Or is it just me your trying to make a point of?

[GyroRon]

Skyguy, I am not trying to be confrontational nor am I trying to put you or your ideas down. Your just taking it that way and I am sorry you are. Experimentation is great.


I am sure your more of a expert on engines than I am, maybe this engine is the answer to all our prayers. I have seen the engine on two gyros. Neither engine made it past 50 hours. If it really did hold up then it would seem it would be a very popular engine. 90+ horsepower in a small light package.... Can be bought for half or less than a aircraft version.... Parts are cheaper.... whats not to like?

As for Brent, I am pretty sure he has tried the 670 once before and for whatever reason he got rid of it. Now he is going back to it. Like you said, I seem to recall him saying the redrive kept giving him problems. Is this engine that powerful that it blows up redrives... the same redrives people are successfully using on 160 horsepower Subarus?

[GyroRon]

after thinking about it, I can see where my first post in this thread could be seen as uncalled for. I am sorry it comes across as it does. Again, I am sure a 670 could be made to work with the right mods and gearbox, exhaust etc... But I have not known anyone to have had success with it. I also look at what is out there flying, and I can only recall knowing of one other aircraft - a plane - that had a 670 in it, and it was a new plane with a new engine. It was for sale so it never had a chance to prove itself.

I look at planes all the time, I am out flying here and there every weekend... I am on the internet several times a day looking at web site after web site... I browse the Classifieds twice a day looking at pretty much everything listed for sale from hang gliders to Jetliners. I pay extra close attention to Ultralights and experimental aircraft. I rarely see anything with what I would call a non standard engine. A Vw here, a Subaru there, maybe a Geo metro, But sled engines..... You just don't see them.

I understand a big reason not everyone is using sled engines is you can't buy them as a turn key engine as you can a 582 Rotax. But Ultralighters and Experimental aircraft owners and builders are a crafty lot of people, and I would expect if it were a good engine you would just plain see more of them out there flying.

You mentioned the Mac in your last post. You said it never gave you trouble. Are you saying it is a good dependable engine? I wouldn't know, I have never owned one myself and only know what I have heard and been told by people that did own them. But the way I see it, if it could be a dependable engine then what else could top it for power to weight? Maybe we should try to put a gearbox on one so we can turn a big prop and get monster trust out of it. 90 horsepower out of such a small light engine would be great.

[skyguynca]

I think one of the reasons for the Mac's downfall is people don't have very much experience with it. The guys flying Bensens/KB2's with the Mac gave me honest good advice and it worked. A gearbox on a Mac would be a real hard thing to do but yes it would give more power that way. I think the biggest drawback is using the Holley 1920 or 1940 carb, it works but not really suited for the job. Mac's are also really loud, did not bother me much but annoyed the hell out of the people living around the airport.

I think I am also being a bit touchy tonight Ron, sorry about that. Just finishing up 2 anuals on our lease 65-A90 KingAirs, also finishing up a 100hr/annual on our Beech 99 Airliner, have the FAA coming in for inspection for our Canadian Lease planes....trying to find time to finish the install of a new engine in the Stearman, trying to finish restoring my 172, and dying to finish my new gyro........I am just way toooooo busy. I could use some help that is for sure.

Anyway, sorry Ron.

[GyroRon]

I think I am also being a bit touchy tonight Ron, sorry about that. Just finishing up 2 anuals on our lease 65-A90 KingAirs, also finishing up a 100hr/annual on our Beech 99 Airliner, have the FAA coming in for inspection for our Canadian Lease planes....trying to find time to finish the install of a new engine in the Stearman, trying to finish restoring my 172, and dying to finish my new gyro........I am just way toooooo busy. I could use some help that is for sure.

.

Might want to contact Scott Essex. He might know where you can get some cheap help that work under the table. They got North Carolina drivers license and a A&P ticket from Faa.... :D

[scottessex]

Yeah, What's up with the N.C. Drivers license? Fog a mirror get a license? :confused:

It' no different over here in Jo-Ja. :)

[skyguynca]

LOL.....the boss keeps promising to hire another guy to help out but he hasn't done it for the past 3 years. I gonna work on him this morning about that, it is cutting into my project time. I used to live in GA for awhile when I was stationed at Hunter in TF160. I lived outside Savannah.

[Brent_Brown]

I had gearbox trouble with the last 670 I had. I just got the e box and pipe today but he sent the pipe all together I wanted it apart to make it fit the frame better I will see what I have to do to get get right. I hope it works for more than 50 hour. the 670 will not make it to BD. But the pegleg gyro with the MZ will. I hope to sell it there and use that to get the tractor in the air.

[skyguynca]

That is what I hear from all who have tried the 670, gearbox trouble not engine trouble. Like I said I know a few who have made it work but it is alot of tinkering to get the right gearbox/clutch thing working to keep from breaking components.

[MikeBoyette]

Dad built a tandem two place with a 670 on it for Russ King. The engine blew up with less than 50 hrs on it. If I remember correctly it spun a bearing. If not it was a major internal failure. The gyro it was on is now owned by Doug Riley. He put a 618 on it and then a 912. The 670 had a C-box on it and to my knowlege no gear box trouble. Maybe Russ King will chime and inform you of his troubles personally. I do recal him saying that a 670 makes a better boat anchor than a gyro engine.