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Ber60 · 03-01-2009, 12:57 AM

Hi guy's
After the battery mod the heli was a bit slow in lift so I 've made some bigger aluminum blades, each blade weighs about 19 gr and is 20% bigger than the old ones
These are the specs of my Big Lama now
Rotor diameter... = 54 cm
Total weight ........= 575 gr (@ lift off)
Batt.....................= 2170 mA
Netto load...........= 185 gr
I know I am the limits of the motors because they get hot after 3 min of hover but I have some cooling fins coming my way and will do a longer test flight when they arrive
I have placed a old blade on the new one (in the pic) just for comparison

mnwizard · 03-01-2009, 07:49 AM

Very cool Ber! What do those new blades sound like?

Mr.Andersen · 03-01-2009, 09:04 AM

Aluminum blades on a RC heli! Be afraid be weary afraid.
I would keep my fingers away from those rotating blades.

Ber60 · 03-01-2009, 05:55 PM

Quote:

Originally Posted by mnwizard

Very cool Ber! What do those new blades sound like?

They sound very mush the same as the plastic blades Jack

Quote:

Originally Posted by Mr.Andersen

Aluminum blades on a RC heli! Be afraid be weary afraid.
I would keep my fingers away from those rotating blades.

No worries, I still have the scars of a belt cp who bit me.
Now I realy can use this heli mow the lawn

Mr.Andersen · 03-02-2009, 02:34 PM

How is it flying with those blades?
Do you get better lift?

Ber60 · 03-02-2009, 02:40 PM

Yep, got the lift like before the batt mod but the motors get hot and I am afraid they will burn out so I am waiting for the cooling fins to do any more tests

extremewattage · 03-04-2009, 01:51 PM

with the size of those motors, could you not find a easy brushed drop in solution?

Ber60 · 03-04-2009, 03:50 PM

They are 2 stock 370's but I will not change them, just slap some cooling fins on them and try to find lighter blades..
The problem with this heli is it is to big for livingroom flying (it kiks up to much dust and makes to much wind) and not to dependable outdoors if there is a bit of a breeze, I used it in a big underground carpark and it was a joy.
So because I like coax heli's I am compiling info on tru ccpm coax heli's to see if it is feasable to engineer a homemade 450 or even a 600 coax for outdoor fun (and not to expencive)

mnwizard · 03-04-2009, 04:35 PM

Sounds like a great project Ber, I can't wait to see you get on it!

03-01-2009, 12:57 AM	#1 (permalink)
Ber60 Registered Users My HF Map location Join Date: Jan 2008	Big Lama just got bigger Hi guy's After the battery mod the heli was a bit slow in lift so I 've made some bigger aluminum blades, each blade weighs about 19 gr and is 20% bigger than the old ones These are the specs of my Big Lama now Rotor diameter... = 54 cm Total weight ........= 575 gr (@ lift off) Batt.....................= 2170 mA Netto load...........= 185 gr I know I am the limits of the motors because they get hot after 3 min of hover but I have some cooling fins coming my way and will do a longer test flight when they arrive I have placed a old blade on the new one (in the pic) just for comparison Attached Thumbnails __________________ Anything that flies

03-01-2009, 07:49 AM	#2 (permalink)
mnwizard Registered Users Join Date: Oct 2007	Very cool Ber! What do those new blades sound like? __________________ - Jack Cranky old fart and charter member of ESO Lots of Helis

03-01-2009, 09:04 AM	#3 (permalink)
Mr.Andersen Registered Users Join Date: Jun 2008 Location: Trondheim Norway	Aluminum blades on a RC heli! Be afraid be weary afraid. I would keep my fingers away from those rotating blades. __________________ Logo 600SX Warp 360 Chase 360 Exo 500

03-02-2009, 02:34 PM	#5 (permalink)
Mr.Andersen Registered Users Join Date: Jun 2008 Location: Trondheim Norway	How is it flying with those blades? Do you get better lift? __________________ Logo 600SX Warp 360 Chase 360 Exo 500

03-02-2009, 02:40 PM	#6 (permalink)
Ber60 Registered Users Thread Starter My HF Map location Join Date: Jan 2008	Yep, got the lift like before the batt mod but the motors get hot and I am afraid they will burn out so I am waiting for the cooling fins to do any more tests __________________ Anything that flies

03-04-2009, 01:51 PM	#7 (permalink)
extremewattage Registered Users Join Date: Jan 2009	with the size of those motors, could you not find a easy brushed drop in solution?

03-04-2009, 03:50 PM	#8 (permalink)
Ber60 Registered Users Thread Starter My HF Map location Join Date: Jan 2008	They are 2 stock 370's but I will not change them, just slap some cooling fins on them and try to find lighter blades.. The problem with this heli is it is to big for livingroom flying (it kiks up to much dust and makes to much wind) and not to dependable outdoors if there is a bit of a breeze, I used it in a big underground carpark and it was a joy. So because I like coax heli's I am compiling info on tru ccpm coax heli's to see if it is feasable to engineer a homemade 450 or even a 600 coax for outdoor fun (and not to expencive) __________________ Anything that flies

03-04-2009, 04:35 PM	#9 (permalink)
mnwizard Registered Users Join Date: Oct 2007	Sounds like a great project Ber, I can't wait to see you get on it! __________________ - Jack Cranky old fart and charter member of ESO Lots of Helis

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