3D Hobby Shop 57" Extra 330 SC -Build Thread- - Page 153 - RC Groups
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Feb 04, 2010, 12:23 AM
spitfire thunders superior
tuck's Avatar
I am not sure if anyone is interested
..but the hoffman magnetics motor arived today,,,, the windings do look hand wound,
the motor seems to be perfect appication for a light set up 6.8oz 790kv, (another but, thats a double negitive right?)
the x mouunt is attached the back end of the motor and it's plastic..........So even if the motor was awsome, it would never handle high energy manuvers,tumbles ect....
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Feb 04, 2010, 12:26 AM
spitfire thunders superior
tuck's Avatar
Is anybody using carbon fiber x mounts on this plane?.....I ended up getting a scorpion 3026/12. Does scorpion sell carbon fiber mounts??
Feb 04, 2010, 12:40 AM
↓↘→ + (punch)
theKM's Avatar
I just put a 3026-710 in a 57, and the packs are right up front to balance with the stock metal mount that comes with the motor. So, no need for a carbon mount as far as I can see.
Feb 04, 2010, 02:17 AM
Postcards From The Purple Edge
tuppertn's Avatar
I had the choice of the 3026-710 and the 4020-10. I went with the 4020 because I heard some folks needed nose weight with the 6-7oz motors. With the 10.7oz motor and 2x 4s/2150 packs it balances nicely but the packs are still half way up under the cowl to get the recommended starting CG.


Is there any way to remove the plastic mount on the Hoffman motor? That seems like an odd thing to do. Plastic?! Maybe that's why they didn't sell enough of them to stay in production.

kendall
Feb 04, 2010, 03:16 AM
For the Birds
Stagger_Wing's Avatar
Quote:
Originally Posted by tuck
Is anybody using carbon fiber x mounts on this plane?.....I ended up getting a scorpion 3026/12. Does scorpion sell carbon fiber mounts??
The gobrushless carbon X mounts fit the Scorpion 30 mm motors. The description says it is for the 40 mm series, but the one I bought fits the 30 mm scorpions perfectly.

http://www.gobrushless.com/shop/inde...&ref=CF-XMOUNT


Quote:
Originally Posted by theKM
I just put a 3026-710 in a 57, and the packs are right up front to balance with the stock metal mount that comes with the motor. So, no need for a carbon mount as far as I can see.
I started using carbon mounts instead of metal mounts not because of weight savings but because of longer expected life. The metal X mounts seem to last about 300-400 flights in my airplanes before they fatigue and break. The carbon one listed above is the first non metal mount I have tried and I am hoping it will last longer.


Quote:
Originally Posted by tuck
the x mouunt is attached the back end of the motor and it's plastic..........So even if the motor was awsome, it would never handle high energy manuvers,tumbles ect....
Assuming the plastic mount is rigid enough not to flex under load it may well have an advantage over a metal mount due to the fact that plastics often have a much better cycle life than metals. Polypro for example is considered a living hinge, meaning it will last no less than 1 million cycles before failure.
Feb 04, 2010, 03:36 AM
I fly, therefore, I crash!!!
SteveT.'s Avatar
Quote:
I started using carbon mounts instead of metal mounts not because of weight savings but because of longer expected life. The metal X mounts seem to last about 300-400 flights in my airplanes before they fatigue and break. The carbon one listed above is the first non metal mount I have tried and I am hoping it will last longer.
Hmmmmm...300 to 400 flights??? I hope my planes last long enough to find out if they last that long....so far mine haven't quite done that...about two hundred flights or so seems to be the limit..

SteveT
Latest blog entry: My hangar...
Feb 04, 2010, 03:40 AM
iumop ap!sdn w,I
G.P.'s Avatar
I don't think any of my 3D planes have ever broken out of the double digits without a major rebuild!
Feb 04, 2010, 10:28 AM
spitfire thunders superior
tuck's Avatar
Thank you staggerwing...Thank you The KM .................. THe plastic X mounts will not do for my style, or even our styles of flying...
I had a Common Sense X mount brake in my first 60 flights,, crazy thing was the only reason I found out was because I decided to change motors.. I loosed the bolts and the motor just fell and hung on 1 piont, leaving only the three of the x's mount pionts still conected....Scary...
I have gotton 100 flights in as little time as 4 and a half weeks.....
Last edited by tuck; Feb 04, 2010 at 10:47 AM.
Feb 04, 2010, 10:36 AM
spitfire thunders superior
tuck's Avatar
From veiwing videos and the corrosponding setups... I have concluded.....
The light set up is for me....cool thing is I can always go bigger later......
Feb 04, 2010, 04:34 PM
Some Sharp Looking Cheddar
i love nachos's Avatar
Got me a GR60 on the way! Thanks Manta..
Feb 04, 2010, 04:46 PM
OOPS
Manta1's Avatar
Youre welcome!I expect some video of you rocking your blinged out extra with it bro!Motor ships tomorrow and ill get you a tracking number.
Feb 04, 2010, 04:49 PM
Registered User
Knotnuts's Avatar
I still haven't figured out why you guys are using a GR60 in this airframe. Enlighten me. The 45 (4S) in mine has all he power it needs. A 4lb. 8 0z. RTF airplane just needs 1/2 to 3/4 throttle to fly straight up and accelerate. The GR60XL pulls my 7 1/2 lb Vyper Quite well on 5S with an 18x10...Enlighten me. Which manuver do you use all that power in?
Feb 04, 2010, 04:50 PM
ExtremeFlight - 3DHS - Legacy
blucor basher's Avatar
I think its primarily because the supply of GR-45's dried up and the GR-60 does make for a really, really fun plane.
Feb 04, 2010, 04:53 PM
"Because I was pǝʇɹǝʌuı"
bighead93's Avatar
Quote:
Originally Posted by blucor basher
I think its primarily because the supply of GR-45's dried up and the GR-60 does make for a really, really fun plane.
With the GR-60...is that work best on 4S or 5S?
Feb 04, 2010, 04:54 PM
Registered User
Knotnuts's Avatar
Quote:
Originally Posted by blucor basher
I think its primarily because the supply of GR-45's dried up and the GR-60 does make for a really, really fun plane.
For drag racing or pylon?


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