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HomeScale✈️AircraftScale HeliScale Helicopter Main Discussion › Another Century Bell 47 question-Motor Mount?
06-11-2005 05:02 PM  14 years ago
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55crownvic

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Colorado Springs

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Another Century Bell 47 question-Motor Mount?
So the pictures on the box show a fuel tank with the lines exiting the back of the tank. The tank in the kit has them exiting on the right side. I guess I have two questions then...........(1) Is there a tank that the lines come out the back that I can replace this one with, and (2) since I ordered the side frames/muffler, how will the side frames fit around the tank with the lines on the right side? Anyone have this problem?

Dave
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06-11-2005 11:42 PM  14 years ago
darksidedave

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The optional side frame kit has a extra bottom plate that mounts the stock tank facing to the rear.
this is because the sideframes will not fit at all with the tank in the normal side-exit location.
the new bottom plate will use a little bracket to hold-down the stock tank

I did find it nessecary to grind the plate to keep it from rubbing on the engine backplate
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06-12-2005 12:33 AM  14 years ago
55crownvic

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Thanks Darksidedave!
I had PM'd several guys here on RR that have these helis, and the answer was swift in coming! I had ordered the side frame kit, but it was out of stock at Century(duh!) Thats how I didn't know about the mounting plate. Don't know how long it will take to get that. And there was no mention of the plate anywhere in the directions(duh!)

RR to the rescue
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06-12-2005 05:02 PM  14 years ago
55crownvic

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Darksidedave...........PM sent
My engine sits at an angle. Does anyone else have this prob?
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06-12-2005 11:08 PM  14 years ago
darksidedave

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Your engine should be nice and square in the mount before begining to fit the mount with engine into the frames. when the 4 mount to sideframe bolts go in the basic alignment should be real close to start .
If you have a Thunder tiger 50 that was originally part of a factory kit and engine combo ( a "pull-out" like Heliproz sells) then the engine bolt pattern IS different and the engine will NOT sit square on the standard 47 mount
I know this because MY engine is a TT50 that was a pullout
I did not have to buy the Rappy 50 mount though...
I was able to elongate the holes on the engine a little bit and then it fit nicely on the stock mount
always make the engine square to the mount first on a 30-50 century
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06-12-2005 11:22 PM  14 years ago
darksidedave

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After ensuring the frames are in good alignment and the sideframs are final torqued to upper frame
then with the small amount of movement the slotted sideframe to mount holes allow first set the up and down distance to put the gears on the same plane (without the clutchbell rubbing the counter-gear) then move it front to rear to get the best gear mesh possible
all this will involve tightening and loosening the mount to sideframe bolts a few times and a bit of fiddling to get it just right
I use the startshaft pin to center in the fan notch to check side to side alignment by looking from the front

And check the front to rear alignment by centering the pin in the groove as viewed from the side

When you are done the gearmesh should be just right and the engine nice and square

It is usually after achieving this perfection that you realize you need to pull the engine back out to put the muffler bolts in before putting the engine in first (DONT ASK HOW I KNOW ,LOL)

And here is what the grinding on the bottom plate so it wont rub the engine looks like
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06-12-2005 11:54 PM  14 years ago
55crownvic

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My tt50 is almost 4 years old and came with the raptor, so it is not a takeout. If you look at the holes in the mount that the motor attaches to you can see they are tilted to one side, and the groves in the mount are tilted also. This is definately a defective mount and I will be calling Century first thing tommorow! Also I must have an updated kit or something, because the flybar arms are totally different from the manual. Mine make a solid flybar loop. I went to Centuries site and looked up the manuals and there is an update to the manual. So far I'm not impressed with this kit, but then I had to have the Bell 47, so there you go!

Cant hardly wait to start assembling the canopy
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06-13-2005 02:37 AM  14 years ago
darksidedave

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The older TT50 is where your trouble is.
sometimes when a buyer wants a raptor 50 / os50 combo from a large seller like heliproz , the seller may not have a raptor kit by itself that they can sell right away with the OS engine.
If they have a raptor with engine they may choose to remove the TT engine and sell it with the OS so the customer is not backordered
then they have a TT engine with no retail box that they sell by itself for a little less than the same retail packaged engine
That is why it is called a takeout

I am not a raptor expert , but I have a TT50 that was a takeout

I think untill recently the TT50s that were packaged originally in kit combos did not have the OS bolt pattern but the retail box TT50 did share the OS pattern

You can try your raptor mount in the 47 or you can modify the holes in the TT50
http://www4.mailordercentral.com/he...mber=132450BULK

And yes they upgraded to the symetrical flybar arms on the 4mm flybars from the older F-46 style
http://www4.mailordercentral.com/he...p?number=132079
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06-13-2005 03:27 AM  14 years ago
55crownvic

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darksidedave
This tt50 was removed and an OS50 put in its place with NO probs, so it is clearly a defective mount. I'll post some pics of the mount tommorow so you can see what I am talking about, or PM me with your email addy, and I will send one to you now.
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06-13-2005 04:27 AM  14 years ago
darksidedave

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A OS50 fit right in the 47 using the mount that the TT would not fit ?
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06-13-2005 04:51 AM  14 years ago
55crownvic

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No............. the tt50 motor originally came out of a Raptor and an OS50 was put in it's place. What I'm saying is they have the same bolt pattern. I sent you a pic of the century mount next to the tt mount.
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06-13-2005 05:36 AM  14 years ago
darksidedave

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Well that is one fine looking plank mount you got there ,, if you need 20 deg of thrust offset ..
YES that mount is JUNK
they should give you 2 mounts and a 47 muffler for your trouble

i could not post the pics for you because they turned into bitmap files somewhere in the mail
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06-13-2005 02:28 PM  14 years ago
55crownvic

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The one on the right is the 47 mount

This shows the offset, yeah I hope they give me another!
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06-13-2005 06:33 PM  14 years ago
Heli PIC

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Petaluma, CA USA

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I can really feel your frustration now. I just went through it myself. Hang in there; once you get everything dialed in, you will not only like the way it looks, you will also like the way it flies.
The mechanics manual that came with the kit is more for the 30 size scale birds. If you have any question in regards to how to setup your flybar, go to the Century website where you can download the manual for the falcon. You will find it more informative.
Good luck.
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06-13-2005 08:39 PM  14 years ago
darksidedave

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I still caint believe how bad that mount was machined .
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06-13-2005 11:35 PM  14 years ago
55crownvic

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yeah, me either. Only now I have to do the run around with Heli world. Who knows how long that will take. Might be better off just ordering a new one, BUT when you pay big bucks for something you expect it to work, and you should get a replacement immediately. When I called them this morn, they should have said"no prob we will send another to you today" but noooo its, send us a pic and then we will get back to you. Too bad this wasnt bought from Modefos, it would have been a done deal then.
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06-17-2005 12:24 AM  14 years ago
55crownvic

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Thanks Rotator!!!
He sent me a spare that he had lying around Now I can proceed with the 47, EXCEPT the sideframes/muffler kit is still out of stock. So I'll do what I can

Dave
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06-20-2005 05:07 AM  14 years ago
eric_b

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Denver, CO, USA

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Dave, that offset is in there to counteract engine torque (I thought everyone knew about that ). You know, without the offset, your heli will fly around the world to the left. I hope you've flown control line before....

Then you'll have to buy Century's "Left Turn Signal Upgrade Kit", and let me tell you they don't just give those suckers away, no siree bob.

Half of my kidding aside, it looks like you got a prime example of Century's best machining... err, ahem, paper weight. I think I could do better myself with a well seasoned hacksaw and a cold chisel. Maybe they sent you their business card holder by mistake?!?!?
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06-20-2005 05:20 AM  14 years ago
darksidedave

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Yeah it looked like something I whipped up on my $169 Harbor Freight 3 axis vertical mill / drill
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