RunRyder - Tail motor instead of tail belt:

rrTV-PHOTO

New HD TV

HOME rrTV-PHOTO GALLERIES MY GALLERY HELP-FAQ

myHOME PM pmRR MEMBERS 392 ONLINE 45 EVENTS SEARCH REGISTER START HERE

6 pages [ << < 1 2 ( 3 ) 4 5 NEXT >> ]

6302 views

POST REPLY

Advantage Hobby	.	Revolution Models	.	CarbonXtreme
	.		.

e-Align T-REX 450-500-600 > Tail motor instead of tail belt:

Ozydego
Key Veteran
Location: Westerville, Ohio

I see your points Hover, but I think you are off on one of them. Telling a customer they have to buy two ESC's, two motors, and set up both is not appealing at all to a customer.... Telling them its all there is a thing customers like to hear. I think the belt, pulleys and extra gear are far less expensive to make than this proposed setup, and I could see how that would keep a manufacturer from doing it. especially on bigger helis where bigger more expensive motors are needed... It is not economical as far as costs go, but it is economical (in theory) as far as power, noise and bogging are concerned. In practice, we will see... this is not for everyone, if it was, it would be a marketed modification... I wanna tinker, and I wanna get rid of my belt... and I dont want a shaft drive.... hence, this motor idea sounds really good to me.....

But Honey, I can't live with just stock.....

03-22-2006 Over year old.

Hoverup
Elite Veteran
Location: Gulf Coast

The HummingBird 3D Pro has a shaft driven tail. Some creative folks are offering belt drives to get around the gear stripping problem at the T/R spur that is piggy-backed on the main shaft spur gear.

I still want to see this idea carried through to a conclusion for those of us that are into scale and don't want to fool with flex shaft or complicated belt driven T/R's.

Cheers - Boyd
AMA80393
Major USAF
Retired

03-22-2006 Over year old.

catfight
Key Veteran
Location: USA

Not sure I understand how a separate tail motor will prevent bogging. I would think bogging occurs because of the available power from the battery. Wouldn't separates essentially require about the same amount of power as a belt drive?

03-22-2006 Over year old.

HOMEPAGE

Hoverdown3K
Key Veteran
Location: Rochester, New York

As far as I know.. Bogging is caused by a couple of factors.

1.Motor and Pinion used

2. "C" rating of the lipo used

3. main blade Pitch settings too aggressive

4. headspeed to low.

-= I know there is Money in RC helicopters. I put it there=-

03-22-2006 Over year old.

HOMEPAGE

catfight
Key Veteran
Location: USA

hoverdown,

I agree with you but how would an electric tailmotor help with that situation?

03-22-2006 Over year old.

HOMEPAGE

Ozydego
Key Veteran
Location: Westerville, Ohio

so, if the battery is causing the bogging, it is also gonna be very warm, and would eventually fail, we dont see that very often, so i dont think the C rating has as much to do with it as we think. i see bogging coming from having the belt too tight, or the gear mesh tight, or too much pitch...

BTW, the park 300 outrunner I bought with the "replaceable shaft" is not really replaceable if it wont come out... i am now sending my motor to e-flite to have them get it off.... I and my LHSguy tried everything possible including a pinion puller and heat and cold and still not a budge... I think its a defective motor, so e-flites gonna swap it for me I hope....

But Honey, I can't live with just stock.....

03-22-2006 Over year old.

Hoverup
Elite Veteran
Location: Gulf Coast

Park 300 BL Outrunner Motor, 1380Kv Specs
Type: Brushless Outrunner
Size: 180 / 280 replacement
Bearings or Bushings: Ball Bearings
Wire Gauge: 1.5mm
Recommended Prop Range: 6x5 to 8x3.8 (3-cells) or Up to 10x3.8 (2-cells) Slow Flyer
Voltage: 7.2 - 11.1V
RPM/Volt (Kv): 1380
Resistance (Ri): .328 ohms
Idle Current (Io): .38A @ 8V
Continuous Current: 7A
Maximum Burst Current: 9A (15 sec)
Cells: 6-8 Ni-Cd/Ni-MH or 2-3S Li-Po
Speed Control: 8-10A Brushless
Weight: 24g (.8 oz)
Overall Diameter: 28mm (1.1 in)
Shaft Diameter: 3.2mm (1/8 in)
Overall Length: 22mm (.87 in)

Cheers - Boyd
AMA80393
Major USAF
Retired

03-22-2006 Over year old.

Ozydego
Key Veteran
Location: Westerville, Ohio

yup, 24 grams with the stock motor shaft...

But Honey, I can't live with just stock.....

03-22-2006 Over year old.

Ozydego
Key Veteran
Location: Westerville, Ohio

So what happened to the top of the vert fin?? I like the way that looks... My project is on hold until E-flite gets my motor back to me... apparently my shaft was forced into place and they are going to take a look at it and prolly replace the shaft and end bell... I am working on getting a shaft made.... I am gonna have to perfect the 3.2mm shaft down to 3mm bearings issue, unless I can find some 1/8 ID bearings with an OD of 8mm.... thats gonna be the trick... I should have just wound my own motor... it would hae saved a lot of headache....

Willy can you take a pic of the opposite side ao I can see how you mounted it....??

But Honey, I can't live with just stock.....

03-24-2006 Over year old.

axis
Senior Heliman
Location: Lone Star State, USA

This is an awesome project. I like the esae of changing the tail rpm to suit your individual needs, easily. I'm going to see about drawing up a new boom that isnt round

and see what I can come up with.. I wanna do this..

03-24-2006 Over year old.

axis
Senior Heliman
Location: Lone Star State, USA

I have a good idea for a stiff light boom cut from .030 carbon plate. You lose the rear gear box/mounting assembly if its designed right. So the weight may balance out. I dont have AutoCAD on this machine or I would already be drawing but let me get to a mahine that does and I'll sketch something,render it and post it so you can see..

03-24-2006 Over year old.

spork
Veteran
Location: Mountain View, CA

Quote
Definetly, worth looking into, no reason why a boom has to be round .

I certainly agree with that in principle, but the boom will have to be reasonably rigid to both bending moment and torsion. I think you end up with either a cylinder or truss structure. Plates and I-beams tend to be kind of noodly in torsion.

That being said, I'm eager to see what you do come up with. This is what the hobby is all about.

RC

03-25-2006 Over year old.

HOMEPAGE

Ozydego
Key Veteran
Location: Westerville, Ohio

So I found a CDRom drive and pulled the shafts and dang are they a nice fit to the align bearings... Dunno wat is gonna happen tho when I try to fit it in the 3.2mm shaft hole when I get my motor back... E-flite has it right now getting the original shaft out... Dont ask, cause it just pisses me off.

Any Ideas of how to shim a 3mm shaft in a 3.2mm hole?? Or try to refit 3mm bearings in the motor... or try and use the stator seperately??

But Honey, I can't live with just stock.....

03-25-2006 Over year old.

axis
Senior Heliman
Location: Lone Star State, USA

boom is drawn.
I incorporated the vert fin, servo mounts, tail motor mount and boom brace into one unit. Tomorrow after we leave the field I'll render it.

03-25-2006 Over year old.

spork
Veteran
Location: Mountain View, CA

Quote
boom is drawn.

Please post pics. Must see.

03-25-2006 Over year old.

HOMEPAGE

Ozydego
Key Veteran
Location: Westerville, Ohio

I wonder if heat shrink would work, if its thin enough... your right.. a .1mm shim sounds impossible, and I think shrink is thicker than that... I guess I will just see when the motor comes... it looked like the bearings wouldnt be too hard to remove from the stator, but i have another homemade lathed shaft that is 3.2mm stock that i shaved down to 3mm... I really have to work on those though to keep em straight and a constant thickness.. my last one, i spent over 2 hours machining... a big ole pain...

But Honey, I can't live with just stock.....

03-25-2006 Over year old.

Ozydego
Key Veteran
Location: Westerville, Ohio

man... Im fitting mine to a 800gram heli... mines a piggy.... still havent got the motor back to play with

But Honey, I can't live with just stock.....

03-27-2006 Over year old.

Ozydego
Key Veteran
Location: Westerville, Ohio

Were you able to measure the AUW after winding your motor Willy?? I'm curious how it measures up...

But Honey, I can't live with just stock.....

03-28-2006 Over year old.

efliernz
Senior Heliman
Location: Hamilton, New Zealand

Willy - where are the photos???

Did the rain finally stop there?

Pete, Trex 500, Trex600 Al, Low-volt alarms - check the gallery for my alarms ,GY401, DX7.

03-28-2006 Over year old.

HOMEPAGE

Ozydego
Key Veteran
Location: Westerville, Ohio

Willy, looks awesome man... I cant wait to get my motor back... I like how you did the main shaft, cause Reflex just cut the spokes off the gear. I like it a lot better with just the hub... So where did you mount the P10??

But Honey, I can't live with just stock.....

03-28-2006 Over year old.

6 pages [ << < 1 2 ( 3 ) 4 5 NEXT >> ]

6302 views

POST REPLY

Midland Helicopters	.	HeliProz	.	ZoomsHobbies
	.		.

e-Align T-REX 450-500-600 > Tail motor instead of tail belt:

UPDATE SCREEN PRINT TOPIC

Advertisers

Subscribe to This Topic