3DHS Fanatics! - Page 112 - RC Groups
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Mar 18, 2012, 09:34 AM
Time to Fly AJ's Best!
heritageflyer's Avatar
Quote:
Originally Posted by theKM
there's factors that go into all this that have to do with the production side of the operation... but ultimately we know the issue, trying to make changes to get on top of it.
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Mar 18, 2012, 01:34 PM
Stick banger
Ace4's Avatar
Quote:
Originally Posted by hugocraft
Lost a wheel collar on the 87shp and didn't know until after I landed. The wheel pant kept the wheel on. I got some 5/16" wheel collars but they almost fit. I think the axle is 8mm which I don't think dubro or great planes doesnt make. I tried to drill out one of the collars but I took out too much. Guess I need an 8mm drill bit.

I ordered some new sulivan 4" wheels w/ alum hubs from the lhs but they won't be in until monday but have no clue what size the hole will be on those. I'm just trying to get it ready to fly for the weekend. I picked up some 5/16" wheel axles which work great with the collars I have but shaft is pretty small for the wheels already on the plane. Also those axles won't work with the wheel pants since the bolt on part/threads are not long enough.
The stock 87 SHP wheels are 3.5", or at least that's what mine have written on them. If it's 8mm (I never measured mine), try looking at smaller heli shaft collars, some of the 500 and below size helis use an 8mm mainshaft and they have collars to hold it in place.
Mar 18, 2012, 02:57 PM
I fly, therefore, I crash!!!
SteveT.'s Avatar
Would anybody have four 4mm blind nuts (I.E. like the ones in a 3DHS motor box they would part with, I need four please.....

Thanks

SteveT
Latest blog entry: My hangar...
Mar 18, 2012, 05:57 PM
Registered User
Quote:
Originally Posted by SteveTtoooo
Would anybody have four 4mm blind nuts (I.E. like the ones in a 3DHS motor box they would part with, I need four please.....

Thanks

SteveT
pm sent
Mar 18, 2012, 07:37 PM
I fly, therefore, I crash!!!
SteveT.'s Avatar
Thank you Keith...

SteveT
Latest blog entry: My hangar...
Mar 18, 2012, 07:46 PM
Registered User
i have a question it might be a dumb one


I've wonder with 100cc aircraft do can's and add perforamacne or are they just sound deading and extra weight ?
Mar 18, 2012, 08:04 PM
No, I won't ship it. Don't ask
quadracer's Avatar
Quote:
Originally Posted by Futile flight
i have a question it might be a dumb one


I've wonder with 100cc aircraft do can's and add perforamacne or are they just sound deading and extra weight ?
I'm no expert, but just about any internal combustion engine will benefit from back pressure created by the can. with no can, there is no pressure to send the piston back down for the next stroke.
Mar 18, 2012, 08:05 PM
TEAM HILLBILLY
aronph's Avatar
Quote:
Originally Posted by quadracer
I'm no expert, but just about any internal combustion engine will benefit from back pressure created by the can. with no can, there is no pressure to send the piston back down for the next stroke.
combustion sends the piston down every stroke
Mar 18, 2012, 08:10 PM
No, I won't ship it. Don't ask
quadracer's Avatar
Yes, it does, but I know when I run my motorcycle and quad with no can, it has zero power. They will run, but there's just no "grunt."
Mar 18, 2012, 08:11 PM
Registered User
jsmith285's Avatar
Perspective
Mar 18, 2012, 08:12 PM
I fly, therefore, I crash!!!
SteveT.'s Avatar
Please see this site for a basic explanation of how a tuned pipe (expansion chamber/helmholtz resonator) works...

A "can" muffler works somewhat the same, but is not as "peaky" nor does it need to be tuned to the engine, like a true tuned pipe does..

And no, sorry, the back pressure from a tuned pip does not push the piston back down...

SteveT
Latest blog entry: My hangar...
Mar 18, 2012, 08:14 PM
TEAM HILLBILLY
aronph's Avatar
how did you teach that midget to hover?....oh wait... :-)
Mar 18, 2012, 08:17 PM
I fly, therefore, I crash!!!
SteveT.'s Avatar
Quote:
Originally Posted by aronph
combustion sends the piston down every stroke
Actually every second stroke in a two stroke engine, and every fourth stroke in a four stroke or every eight stroke in a "hit and miss" engine, which is an eight stroke engine.... (A stoke of course is either up or down)

How even a simple two stroke engine (be it port timed or reed valve induction) can take a long post to explain...so we won't go there....

But this site has a simple animation...

SteveT
Last edited by SteveT.; Mar 18, 2012 at 08:38 PM.
Mar 18, 2012, 08:31 PM
3d NOOBular
3DNater's Avatar
That animation is sweet.
Mar 18, 2012, 08:32 PM
Aerobatic Fanatic
HugoCraft's Avatar
Sorry PB that we didn't come out and fly with you today. I got "diggity2424" all excited when I would hover the 87shp side by side with his 74" Edge.

The 87shp is mine and the rest belong to "diggity2424"


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