RE: New 53cc engine now available  
View related threads: (in this forum | in all forums)

Tower Hobbies
Enter up to 4 keywords or Tower stock numbers
Logged in as Guest



Users viewing this topic: none
  Printable Version
       

All Forums >> RC Airplanes >> Giant Scale Aircraft - 3D & Aerobatic >> WildHare R/C Support >> RE: New 53cc engine now available
Page: <<   < prev  15 16 [17] 18 19 20 21 22 23 24   next >   >>  

Login
Message << Older Topic   Newer Topic >>
RE: New 53cc engine now available - 9/4/2007 5:30:36 PM   
bluemagic98



Posts: 848
Joined: 7/25/2004
From: Wisconsin Rapids, WI, USA
Status: offline 		This whole thing makes sence to me. I tride the put the sencing tube in the fuse thing and the pill bottle trick on an evolution with zero improvment. I will be setting up 2 engines this week with the method Tom suggested and I will report back my results.

_____________________________

Wild Hare 540 Edge-V1/V2 DA-50 JR9303 WH Cap-232 85" Evolution 58 WH Ultimate WH SU-26

(in reply to Greg Cothern)
       Post #: 401

RE: New 53cc engine now available - 9/4/2007 6:10:52 PM   
tomriddle



Posts: 354
Joined: 8/22/2004
From: Woodbridge, VA, USA
Status: offline 		Great - look forward to your feedback.

I may just give it a shot as well.... my TOC as it is still on the bench...I noticed some burbling as I transitioned to aggressive vertical and as I rolled inverted.

_____________________________

"Life is tough;
but its tougher when you're stupid!"

(in reply to bluemagic98)
       Post #: 402

RE: New 53cc engine now available - 9/4/2007 11:08:47 PM   
Greg Cothern



Posts: 594
Joined: 1/7/2002
From: Seagoville, TX, USA
Status: offline 		Bluemagic98 on the Evolution/MVVS engines they come with the carb slanted down if you install it inverted, flip the reed block so the carb is now slanted slightly up. Made a big improvement in how my 45's idle and transition.

_____________________________

Some of the products I like
Smart-Fly Hangar 9 Wild Hare MVVS & DA Engine''s Futaba Radio Hitec Digital Servo''s

(in reply to bluemagic98)
       Post #: 403

RE: New 53cc engine now available - 9/5/2007 12:04:12 AM   
Tired Old Man


 

Posts: 11571
Joined: 2/25/2002
From: Central, CA, USA
Status: offline 		Greg,

I feel certain that the pop off spring is not an issue here. There a fairly wide acceptable variation in spring pressure tolerance, and it's rarely a problem. Myself and others have found the round cowl planes to be a breed apart from everything else when it comes to diaphragm pressures.

What makes it worse is that two people with the same plane and the same engine can have completely different results if eveything is the same. There's been some experimentation in checking the flow of air ythrough a round cowled plane and it's quite surprising to see air moving completely different from what you see inside a "standard" shaped cowl. Simply adding a basic baffle or carb plate changes it all once again. You darn near need to use smoke going into the cowl to set everything up right. Twins are a lot more difficult than singles since most twins have to be baffled. Singles are pretty easy since generally all you need is the diaphragm tube or a carb plate.

_____________________________

If you can''''t fix it with a hammer, you have an electrical problem.

(in reply to Greg Cothern)
       Post #: 404

RE: New 53cc engine now available - 9/5/2007 4:33:37 AM   
Al Lewis


 

Posts: 1791
Joined: 7/5/2005
From: Port Orchard WA, USA
Status: offline 		It would seem a simple matter to conclude that you would encounter severe spiral turbulence in a round cowl. You have a prop providing a circular air flow entering a round cowl that only helps to accentuate the problem. There are many possibilities as to what is occurring in the cowl. One would be that the air would rip across the top of the carb causing a vacuum or low pressure effect. Another could certainly be a super-charging effect. Without the benefit of a wind tunnel test with a smoke wand any conclusions would be merely speculation. The difficult part of all of this is that the end effect is not present until the plane is in the air and therefore, is unmeasurable on the ground. The final answer for we hobbyists is to attempt to tune our engines specific to their application and hope for the best. I would recommend that you start by tuning the engines to the manual. Then tweak the needles based on your observations in the air i.e. sound, performance, ability to maintain a low idle. Without the benefit of vast resources, not presently available to us, this is all we can do. We can share information and results, we can exchange suggestions, hopefully learn from each other, but we are far from knowing all of the answers and will be, I'm afraid, for some time. Let's hope they are all little problems!

< Message edited by Lou55 -- 9/8/2007 4:17:04 AM >

_____________________________

Take Offs are Optional, Landings are Really Nerve Racking!! Al Lewis AMA #821623

(in reply to Tired Old Man)
       Post #: 405

RE: New 53cc engine now available - 9/5/2007 2:24:00 PM   
Greg Cothern



Posts: 594
Joined: 1/7/2002
From: Seagoville, TX, USA
Status: offline 		I had the same issues on a 53cc in a Kap cowling, go figure! Never did get it to go away! Ended up being talked into selling the bird RTF and it meet an untimely demise.

On my MVVS 45 though as I previously stated getting the carb flipped and a minor adjustment after that cured it completely!

_____________________________

Some of the products I like
Smart-Fly Hangar 9 Wild Hare MVVS & DA Engine''s Futaba Radio Hitec Digital Servo''s

(in reply to Tired Old Man)
       Post #: 406

RE: New 53cc engine now available - 9/9/2007 3:43:44 AM   
bluemagic98



Posts: 848
Joined: 7/25/2004
From: Wisconsin Rapids, WI, USA
Status: offline 		I completed Tom's modifications as described and flew the wings off The Honda Today. Results are as follows. ROCK SOLID!
The plane did not skip a beat all day in verted flight was smooth as upright. No burbling on take off. No burble when I picked the plane of the setup bench. No burble or sag when I performed a Wall, Flat Spin, Inverted Flat, Or that upside down twisting spinning whachamacalit thing that only this Honda will do and the exit's are clean as a whistle. Oh did I tell you I liked this plane before I did this modification?

Attachments
Click to see fullsize image.
Click for fullsize


_____________________________

Wild Hare 540 Edge-V1/V2 DA-50 JR9303 WH Cap-232 85" Evolution 58 WH Ultimate WH SU-26

(in reply to tomriddle)
       Post #: 407

RE: New 53cc engine now available - 9/9/2007 3:46:34 AM   
bluemagic98



Posts: 848
Joined: 7/25/2004
From: Wisconsin Rapids, WI, USA
Status: offline 		I also did the modification to the Evolution 58 in the cap reults are. NFG

Greg Cothern Im going to try your Idea next Do I have to flip the carb as well or can it stay the way it is?

_____________________________

Wild Hare 540 Edge-V1/V2 DA-50 JR9303 WH Cap-232 85" Evolution 58 WH Ultimate WH SU-26

(in reply to bluemagic98)
       Post #: 408

RE: New 53cc engine now available - 9/9/2007 5:00:05 AM   
Greg Cothern



Posts: 594
Joined: 1/7/2002
From: Seagoville, TX, USA
Status: offline 		I would flip it. Allowed me to lean the bottom end more to get more reliable idles and transition as well as much easier starts. As it is shipped from the factory when you install inverted it angles the carb downward so fuel trys to flow out of the carb away from the engine, flipping it allows it to flow towards the engine.

_____________________________

Some of the products I like
Smart-Fly Hangar 9 Wild Hare MVVS & DA Engine''s Futaba Radio Hitec Digital Servo''s

(in reply to bluemagic98)
       Post #: 409

RE: New 53cc engine now available - 9/12/2007 9:26:34 PM   
suntanpilot


 

Posts: 43
Joined: 7/9/2005
From: sun city center, FL, USA
Status: offline 		Hi,

< Message edited by suntanpilot -- 9/24/2007 7:02:55 PM >

(in reply to bluemagic98)
       Post #: 410

RE: New 53cc engine now available - 9/12/2007 9:52:26 PM   
rctom



Posts: 5206
Joined: 5/8/2002
From: Flower Mound (near Dallas), TX, USA
Status: offline 		It really sounds like the low end is too rich.

TF

(in reply to suntanpilot)
       Post #: 411

RE: New 53cc engine now available - 9/12/2007 10:03:49 PM   
TheFoxes


 

Posts: 109
Joined: 8/29/2003
From: Brooklyn Park, MN, USA
Status: offline 		I had a transition problem when advancing from low to high slowly. Quick was great. After much frustration, the easy fix finally came when I pushed the throttle to the burble and kept it there, without clearing it. With the engine running rough, I adjusted the burble away with low needle (a little richer as it turned out). Runs perfect now all the time. If you can get it to "hang" in the burble, adjust it while it's there and see if you can clear it.

ff

(in reply to rctom)
       Post #: 412

RE: New 53cc engine now available - 9/13/2007 2:04:31 AM   
suntanpilot


 

Posts: 43
Joined: 7/9/2005
From: sun city center, FL, USA
Status: offline 		S

< Message edited by suntanpilot -- 9/24/2007 7:03:52 PM >

(in reply to TheFoxes)
       Post #: 413

RE: New 53cc engine now available - 9/13/2007 9:05:58 PM   
bluemagic98



Posts: 848
Joined: 7/25/2004
From: Wisconsin Rapids, WI, USA
Status: offline 		I flew the Honda again yesterday and she was again solid as a rock. I also flipped the reed block in the Enolution 58gx2 and the results where very very promising I could lean the low end 3/4 of a turn min and have a good posative transition. It also started on the first flip after I reset the carb screws. Im going to fly it again on saterday weather permiting. Stuntpilot flipping the reed block worked well for me on the toc 53 and is proving to be a good solution for me on the Evolution 58GX2 as well its worth considering in my opinion.

_____________________________

Wild Hare 540 Edge-V1/V2 DA-50 JR9303 WH Cap-232 85" Evolution 58 WH Ultimate WH SU-26

(in reply to suntanpilot)
       Post #: 414