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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Engine Conversions >> RE: another darn ryobi post (ryobi performance modification, analysis and comparison)
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RE: another darn ryobi post (ryobi performance modifica... - 7/4/2012 9:53 PM   
APLANEGUY



Posts: 63
Score: 105
Joined: 4/30/2009
Last Login: 5/22/2013
From: Wayland, NY, USA
Status: offline 		Yep. All the long shafts I've seen are 3/8"-24. I might feel better just having a bigger prop nut on there anyway. 5/16" always seemed a bit small when bolting up an 18" or 20" prop. After some checking of the plans and some careful measuring and figuring I think the long shafts will be fine "as is" for my twin project as long as I choose the spinners carefully and make the appropriate length spacers for the prop nuts. The blank "stub" on the end of the shaft will have to come off but the threaded portion should be fine right where it is...

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RE: another darn ryobi post (ryobi performance modifica... - 7/24/2012 3:24 AM   
APLANEGUY



Posts: 63
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From: Wayland, NY, USA
Status: offline 		     Here's a question for all you hardcore Ryobi vets. Once you get your engines set up and tuned and running well the way you like them (idle, top end, transition, etc.) do you find that you can leave them alone and not have to be turning needles every time you go to fly and the weather's a bit different or do you have to tune a bit every time you fly? I've been flying Ryobis for a few years now and it seems that more times than not I have to give the high speed needle a little nudge one way or the other to be good on any particular day. Once done I'm good for the day. The reason I ask is up until now the needles have been very accessible on any installation I've done. The next plane I'll be assembling and using Ryobi power will be a Gee Bee R2 and with the massive round cowl that's not easy to remove and the carb right in the center of it behind the engine I'm kinda scratching my head as to how I'll do any quick tuning on a day to day sort of basis. Are all of these engines a bit sensitive to weather or is it just mine? My string trimmers always seem to run just fine without ever tuning them at all but I definitely don't ask as much from them as I do my airplane hot rods. If regular retuning is the norm does anyone have any good ideas how I can make that happen on my Gee Bee project? If it's not the norm them does anyone have any good ideas why I seem to be doing it all the time?... 

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RE: another darn ryobi post (ryobi performance modifica... - 8/25/2012 8:07 PM   
APLANEGUY



Posts: 63
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Joined: 4/30/2009
Last Login: 5/22/2013
From: Wayland, NY, USA
Status: offline 		Here's a little video of my latest Ryobi conversion on my 1/4 scale Affordaplane ultralight. On this day she was spinning an 18x8 Master Airscrew Classic at just over 7900rpm on the ground. Really pulls the goofy little plane around nicely compared to the earlier Ryobi I was using. Love these little engines...

www.youtube.com/watch

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RE: another darn ryobi post (ryobi performance modifica... - 8/25/2012 8:41 PM   
av8tor1977



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From: Lukeville, AZ, USA
Status: offline 		Cool, and different type of airplane. (I'm an ultralight flight instructor.) Nice video too.

But man, I NEVER stay in front of an engine I am revving. I can't wait to get behind that prop once the engine starts.... Please be careful.

No offense intended, but I have seen props fly off, break, etc. and I don't want to see someone get hurt by one. Sometimes an engine "blows" and the sudden stoppage will spin that prop off so fast you can't believe it..... And sometimes Ryobis will "throw a rod".

AV8TOR

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RE: another darn ryobi post (ryobi performance modifica... - 8/25/2012 10:56 PM   
APLANEGUY



Posts: 63
Score: 105
Joined: 4/30/2009
Last Login: 5/22/2013
From: Wayland, NY, USA
Status: offline 		Thanks for your concern but I was never in any kind of danger. I was wearing my lucky hat...   :-)

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RE: another darn ryobi post (ryobi performance modifica... - 8/26/2012 12:40 AM   
bluejets


 

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quote:

ORIGINAL: av8tor1977

But man, I NEVER stay in front of an engine I am revving. I can't wait to get behind that prop once the engine starts.... Please be careful.

No offense intended, but I have seen props fly off, break, etc. and I don't want to see someone get hurt by one. Sometimes an engine ''blows'' and the sudden stoppage will spin that prop off so fast you can't believe it..... And sometimes Ryobis will ''throw a rod''.

AV8TOR


We tried to get the "powers-that-be" down in Aus here to see the same dangers. They insisted on the "prop to the crowd" approach because of the smoke and fumes and extra noise from the reving engines. ...mmmmm...
Thankfully it was changed later so one had to go to a safety section where neither such problems faced the crowd.

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RE: another darn ryobi post (ryobi performance modifica... - 9/5/2012 11:44 PM   
APLANEGUY



Posts: 63
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Joined: 4/30/2009
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From: Wayland, NY, USA
Status: offline 		Here's a little better video of my latest conversion project. Think I may actually be getting the hang of some of this 20th century technology (now that we're in the 21st)...



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RE: another darn ryobi post (ryobi performance modifica... - 9/7/2012 1:11 AM   
w8ye



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From: Shelby, OH, USA
Status: offline 		You need to find a different video editor program that doesn't force you to have music on the video?

I couldn't tell anything about your engine or plane for the music. I think it may be a good plane but couldn't really tell?


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RE: another darn ryobi post (ryobi performance modifica... - 9/7/2012 11:14 AM   
APLANEGUY



Posts: 63
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From: Wayland, NY, USA
Status: offline 		Music is there by choice. Video is very bland without. Didn't make it strictly for engine noise...

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RE: another darn ryobi post (ryobi performance modifica... - 9/30/2012 6:12 PM   
APLANEGUY



Posts: 63
Score: 105
Joined: 4/30/2009
Last Login: 5/22/2013
From: Wayland, NY, USA
Status: offline 		Just thought I'd throw this out there 'cause I think it's gonna help me in the future. I discovered something by accident last week that helped my tune-up a lot. The carburetors I've been using (Walbro WT-324 and it's replacement WT-891) have a regular choke butterfly in them. While at the field last week the choke butterfly screw came loose somehow and the butterfly blade fell out and it almost sucked the screw into the engine. I discovered that there's actually enough room to sneak a finger in between the carb and mount and choke it by hand so I finished flying that day choking it with a finger to get it started if it was cold. The neat thing is that removing the choke blade and rod entirely had the side effect of changing the tune-up a little. I had to open up the high speed needle almost 1/4 turn to smooth out and maximize the top end. I flew it the rest of the day with that setting and it ran very smoothly and seemed to transition from low to high speed better than it ever has. The next time out the weather was a little different and for the first time ever I didn't have to touch the needles and she ran smooth for four flights. I was very happy with it. I decided to leave the choke shaft/butterfly out of it so I removed the carb and filled the choke shaft holes with JB Weld to smooth out the air path a little and make it so I can get a more positive choke with my finger. I believe that on this engine with this carb when the choke was in place and open it was causing undue turbulence inside the carburetor and possibly even causing a bit of choking effect at wide open throttle. That would explain why I had to richen it up some after I removed the choke and might explain why it's been too sensative to changing atmospheric conditions. I'm guessing that it was choking it a little and I had it set a bit lean for that at wide open throttle then at slower speeds it was leaning out a bit and causing the sensitivity and transition problems I had sometimes. I'm convinced enough that when I put together the engine for the Gee Bee I'm gonna eliminate the choke from the beginning and probably go with a primer bulb setup 'cause I won't be able to get a finger anywhere near the carb on that one. We're nearing the end of flying season here so I don't know how much more I'll be able to fly with this setup to expeiment but it definitely seems to be the way to go for me at this point...

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RE: another darn ryobi post (ryobi performance modifica... - 9/30/2012 6:18 PM   
av8tor1977



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Status: offline 		Some people use half of a small rubber ball glued to a long popsicle stick to choke their Ryobis.

AV8TOR

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If it is not SCARY, it is NO WHERE NEAR powerful enough!!

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RE: another darn ryobi post (ryobi performance modifica... - 11/5/2012 11:51 PM   
diceco



Posts: 81
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From: Fletcher, NC, USA
Status: offline 		Hi all,

I'm getting out of wet power and going all electric. I'm selling my Ryobis. Both the ones that are presented earlier in this forum are for sale. Check out the ad over at RCGroups. http://www.rcgroups.com/forums/showthread.php?t=1764328

Thanks, diceco

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RE: another darn ryobi post (ryobi performance modifica... - 11/6/2012 2:29 AM   
av8tor1977



Posts: 5466
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From: Lukeville, AZ, USA
Status: offline 		Bummer. Sorry, but to me electric is not the way to go. I am on the verge of discontinuing all my magazine subscriptions because that's all they have any more; electric airplane coverage, even though a lot of them have "sister" magazines devoted to electric flight. For me, they are fine for park flyers and flying in the evening when you are done flying the "big iron", but that's about it. It is hard for me to believe how people invest all the money to go all electric, and then buy "noisemakers" to simulate real flight. Just my opinion....

Good luck on your sales though...

AV8TOR

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If it is not SCARY, it is NO WHERE NEAR powerful enough!!

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RE: another darn ryobi post (ryobi performance modifica... - 11/8/2012 5:56 PM   
captinjohn


 

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quote:

ORIGINAL: w8ye

You need to find a different video editor program that doesn't force you to have music on the video?

I couldn't tell anything about your engine or plane for the music. I think it may be a good plane but couldn't really tell?



Same here...soon as the music ,I lost interest.  Need more close up video too...just want too help you make things more interesting!

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All Forums >> Glow Engines, Gas Engines, Fuel &amp; Mfg Support Forums >> Engine Conversions >> RE: another darn ryobi post (ryobi performance modification, analysis and comparison)
Page: <<   < prev  17 18 19 20 21 22 23 24 25 [26]





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