Another WM Chipmunk question
05-11-2002, 05:33 PM
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Another WM Chipmunk question
Hideho all,
OK, so I'm getting ready to mount the OS 91 in my 'Munk and I wondered how the masses installed their engines. Inverted or sideways?
Pros and cons to either,
Thanks for the look,
OK, so I'm getting ready to mount the OS 91 in my 'Munk and I wondered how the masses installed their engines. Inverted or sideways?
Pros and cons to either,
Thanks for the look,
05-11-2002, 06:02 PM
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Another WM Chipmunk question
I mounted my .91 sideways. The munk cowl is really not that wide, so you will have quite a bit of engine hanging out the side.
I know alot of guys like to mount their engines inverted, I'm just not one of them. Much easier to fuel, get the glow plug igniter attached, and start when there sideways.
I guess I'd rather have my plane a little easier to start and maintain than better scale looks. In my opinion, at 10 feet no-ones going to give a rats a** anyways.
I know alot of guys like to mount their engines inverted, I'm just not one of them. Much easier to fuel, get the glow plug igniter attached, and start when there sideways.
I guess I'd rather have my plane a little easier to start and maintain than better scale looks. In my opinion, at 10 feet no-ones going to give a rats a** anyways.
05-11-2002, 09:56 PM
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That's my delema....ease of use...or better looks.
I have been debating this question longer than I care to admit.
I am leaning towards ease of use though. PITA planes are flown less it seems, from my experience.
I know that the 'Munk will be an outstanding flyer, I just don't think the better looks will outweigh the advantage of grab and go type flying I do.
I don't really care to putz around dinking with my plane at the field as I see some do.
Any other experiences gladly accepted.
Thanks for the look,
I have been debating this question longer than I care to admit.
I am leaning towards ease of use though. PITA planes are flown less it seems, from my experience.
I know that the 'Munk will be an outstanding flyer, I just don't think the better looks will outweigh the advantage of grab and go type flying I do.
I don't really care to putz around dinking with my plane at the field as I see some do.
Any other experiences gladly accepted.
Thanks for the look,
05-12-2002, 02:11 AM
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Location,Location,Location???
Sideways, Sidewaysamd of course yo could always mount it ...uuumm,,,sideways....and you kmow the reasins why.
http://www.waynelyn.com
http://www.waynelyn.com
05-12-2002, 11:16 PM
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Yea...I can live with the head stickin' out the side. Especially if I do an awsome job of cutting it out.
I just think I will.
HHHMMMFFFTTT. that'l show em!
I just think I will.
HHHMMMFFFTTT. that'l show em!
05-13-2002, 02:16 AM
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Another WM Chipmunk question
Mike, I've got a TT 91 FS w/choke mounted inverted in mine. I have a remote glow adapter coiled just inside the bottom cowl opening. I also have an easy fueler in the top center, (towards the firewall), of the cowl for... mmmm... fueling!
Easy as pie with no hassels. On board glow is not necessary with the engine tuned properly.
I admit I was in the same predicament several years ago when I was building mine. I mounted the engine sideways to see how much would be sticking out. The result was UNACCEPTABLE for my tastes. I just couldn't bear cutting that much out of the cowl while leaving so much dead space inside.
Inverted engines need to be tuned in the intended position. Other than that I haven't had any problems with my two or four stroke engines. They run just as well and actually are easier to start since less prime charge is required.
BTW, search through the Tips & Techniques for advice on the retracts if you fly off of anything but a paved runway.
Good Luck,
Jeff
Easy as pie with no hassels. On board glow is not necessary with the engine tuned properly.
I admit I was in the same predicament several years ago when I was building mine. I mounted the engine sideways to see how much would be sticking out. The result was UNACCEPTABLE for my tastes. I just couldn't bear cutting that much out of the cowl while leaving so much dead space inside.
Inverted engines need to be tuned in the intended position. Other than that I haven't had any problems with my two or four stroke engines. They run just as well and actually are easier to start since less prime charge is required.
BTW, search through the Tips & Techniques for advice on the retracts if you fly off of anything but a paved runway.
Good Luck,
Jeff
05-13-2002, 03:05 AM
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Another WM Chipmunk question
Mount it sideways in a Chippy????
The PIA factor of an inverted four stroke and possibly the associated weight of on-board glow made this a no brainer. I have a wonderful flying chipmunk and the head poking oout the side of the narrow cowl has NEVER bothered me.
http://www.devino.org/mark/airplanepics/chipmunk.jpg
-Cheech
05-13-2002, 03:09 AM
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Hi Mike,
I have the WM CM with a OS 91fs. Mine is side mounted as you can see by the photo. It works for me. By the way, I have a couple more pictures in my gallery.
I have the WM CM with a OS 91fs. Mine is side mounted as you can see by the photo. It works for me. By the way, I have a couple more pictures in my gallery.
05-13-2002, 09:04 PM
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Why not mount it at a 60 degree angle instead? This is the way I like to mount all my fourstrokes. It makes for less of a hole in the cowl. It also performs just as well as a side mount engine and the exhaust expels out the bottom center of the cowl which is alot better and less intrusive in my opinion.
05-13-2002, 09:17 PM
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OOOOH, now that I hadn't thought of.
Terrific idea, thanks Sport.
I'll try and test fit this evening when I get home.
Terrific idea, thanks Sport.
I'll try and test fit this evening when I get home.
05-13-2002, 09:35 PM
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I Just Don't Get It...
I simply can't understand why so many people are afraid of mounting their engines inverted. Why ruin the perfectly smooth contours of a cowl by mounting an engine sideways?
I just don't get it. Then again, I like oysters on the half-shell and JD.
The right to choose is great! (As long as you're happy with it!)
Sport10, good idea. I've got an engine mounted at 7:00 and one at 8:00.
I just don't get it. Then again, I like oysters on the half-shell and JD.
The right to choose is great! (As long as you're happy with it!)
Sport10, good idea. I've got an engine mounted at 7:00 and one at 8:00.
05-13-2002, 10:14 PM
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I love oysters on a half shell and I mount my four stroke upside down. In my opinion, mounting sideways does not make them easier to use and only upsets the balance.
05-14-2002, 02:45 AM
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My vote is for inverted mount. Put onboard glow in it if you're worried about getting access to the plug hole. In a model that size, the tiny bit of extra weight would make little if no difference. I invert mounted the YS.91FZ in my World Models Ultimate and then put onboard glow in it, purely for laziness sake. I like the idea of flicking the switch on the tranny and then just swinging the prop 
05-14-2002, 02:57 AM
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Yesssss! Inverted-she is sweet, she is smooth, she has good lines, she is sophisticated. Well, you get the point. Sideways, on the other hand.......sort of like hamburger or round steak compared to filet mignon. You sideways boys just need to culture a little claaaassss, a little sense of good taste, a little appreciation for the beauty of form. You just gotta quit poking holes and grinding out places on the sides of those beautiful cowls. Jeez men, that is crude and barbaric. You act as if you live in the Stone Age! Just relax--take a deep breath and mount yo motors upside down. Really, you'll be glad you did.
05-14-2002, 03:35 AM
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Well,
You inverted guys do have a point. Although, a nose over could ruin that nice shiny rocker cover. I'm sure you never have a rough landing.
You inverted guys do have a point. Although, a nose over could ruin that nice shiny rocker cover. I'm sure you never have a rough landing.
05-14-2002, 03:55 AM
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Hideho all,
OKey dokey then,
Looks like the 7:00 posisition will work fine, w/ minimal hogging of that purty cowl. Also, no damage if I EVER nose over, which isn't likely.
Looks like just one of the valve covers will be pokin' through.
Seems like the best O both.
Great responses, thanks to all,
Mike
OKey dokey then,
Looks like the 7:00 posisition will work fine, w/ minimal hogging of that purty cowl. Also, no damage if I EVER nose over, which isn't likely.
Looks like just one of the valve covers will be pokin' through.
Seems like the best O both.
Great responses, thanks to all,
Mike
05-14-2002, 04:24 AM
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We all do have a good time, don't we? I really enjoy exchanging ideas and good humor with all of you. That's one point that is so great about this hobby and this forum--we can rib each other and still learn a great deal without taking it all too seriously. And yeah, the Munk does have a tendency to "nose over" sometimes in spite of doing everything in one's power to prevent it. Mike--have fun with yours and keep us posted on how it builds and flys.
Sam
Sam