Aluminum spinners!!!

Aluminum spinners!!!
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Aluminum spinners!!! - 2/28/2007 9:18:27 PM

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I just wanted to let yall know i am now a true believer in an aluminum spinner!! i crashed my extra going 100 MPH+ spinner first into the ground and not only did it keep my motor safe it didnt even leave a scratch on the spinner BUT it did leave a nice 4 inch dent into the ground

..So im wondering how many of you guys out there use aluminum spinners???? i know im gonna put them on all my planes now.

RE: Aluminum spinners!!! - 2/28/2007 9:50:53 PM

armody

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I have used that, and I like those spinners, they are much robust and sturdy as compared to plastic spinners.

Mody

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RE: Aluminum spinners!!! - 2/28/2007 10:07:17 PM

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The trick to getting any spinner to last, wether it be aluminum, plastic or carbon fiber; is to avoid those spinner-first landings. A spinner, no matter what it's made of will not 'protect' your engine in a crash. A strong spinner may absorb some of the energy, but let's face it, if your engine went in at full throttle, you likely bent the shaft or worse.

I agree that aluminum spinners are better than plastic and, in most cases better than carbon, but they do not always limit damage to your plane in a crash.

I have some aluminum spinners up to 4 1/2 inches in diameter and let me tell you....crash protection ain't the reason. They are mostly just for looks...and they are very expensive to boot.

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RE: Aluminum spinners!!! - 2/28/2007 10:42:08 PM

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Ok 1 my shaft aint bent 2 they may be for looks but i like the because they protect my engine put a plastic spinner on a motor goin 100 str8 into tha ground and see if it doesnt break and 3 i had no controle over the plane the battery got disconnected and it went up then str8 back down and yes i believe that aluminum spinners will most likely protect your engines more then plastic and carbon

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RE: Aluminum spinners!!! - 2/28/2007 11:20:41 PM

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Whatever

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RE: Aluminum spinners!!! - 2/28/2007 11:38:00 PM

MikeL

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Whatever is about it. A spinner does not protect your engine. If a person thinks that it does, they need to spend some time thinking about the forces involved in a crash. Aluminum spinners are for looks, and in my experience are easier to use than most plastic spinners.

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RE: Aluminum spinners!!! - 2/28/2007 11:39:02 PM

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I may not be the smartest guy around, but it seems that a plastic spinner breaking into a zillion pieces would be absorbing and dispersing much of the force of that impact. This would lower the forces against the engine and cause less damage.

Kinda like the Nascar safer-barrier.

But, then again ... I'm not a rocket surgeon and the difference would be slight. I use an aluminum backed spinner for strength, but not for protection against that type of crash.

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RE: Aluminum spinners!!! - 3/1/2007 12:27:13 AM

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Ok Example your flying with a plastic spinner and crash down into a concrete runway the plastic spinner would destroy into a million pieces then leaving the crankshaft wide open for attack then the crankshaf hits and it bends the shafter where an aluminum spinner would hit and the aluminum if theres enough force bend the aluminum backing plant and if theres still pressure bend the spinner itself takin pressure off of the crankshaft and leaving it untouched!! so therefore yuh yall may use the for looks but i bet half the crashes yall have had with aluminum spinners its saved yalls motor's

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RE: Aluminum spinners!!! - 3/1/2007 12:58:30 AM

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sorry, but spinners don't protect your engine. They are just for looks and helping to 'streamline' your plane a bit more.

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RE: Aluminum spinners!!! - 3/1/2007 1:40:32 AM

oceansfiftyseven

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Wrong. The aluminum spinner will ensure the majority of the energy transfers straight to the shaft. The energy absorbed by the plastic breaking would likely cause less damage. At 100 MPH, a crash straight into concrete it wont matter what type of spinner you use.

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RE: Aluminum spinners!!! - 3/1/2007 1:46:47 AM

MikeL

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Take this as an opportunity to learn about applied physics, Extra.

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RE: Aluminum spinners!!! - 3/1/2007 2:06:04 AM

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I use them cause they look cool, but i dont think it would stop your motor from getting messed up at a 100mph crash. I am not saying that its not true, but if it was wouldnt everyone have one so if they do crash it want mess there motors up??

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RE: Aluminum spinners!!! - 3/1/2007 2:19:52 AM

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I saw a funtana 40 go in nose first due to a defective battery. The crank broke off behind the aluminum spinner.
the spinner and prop were still intact, but disconnected from the rest of the plane. Didn't help in this instance.

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RE: Aluminum spinners!!! - 3/1/2007 2:29:32 AM

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Forget it i give up

< Message edited by -EXTRA- -- 3/1/2007 2:31:16 AM >

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RE: Aluminum spinners!!! - 3/1/2007 3:04:08 AM

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Good idea. At the very least you damaged the spinner backing plate. Unless you dove into total muck, there's not a spinner out there that would survive unscathed.

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RE: Aluminum spinners!!! - 3/1/2007 3:26:12 AM

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the backing plate is bent but no totally and yea the spinner itself is unscratched considering it hit in dirt

Edit: Ok well i jsut figured i would share some info with yall didnt want noone to get all worked up and i might be wrong just what i saw and what happen so sorry if i offended anyone in anyway

< Message edited by -EXTRA- -- 3/1/2007 3:41:00 AM >

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RE: Aluminum spinners!!! - 3/1/2007 3:44:24 AM

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quote:

ORIGINAL: -EXTRA-

Forget it i give up

Hey man, don't get frustrated. It's great thet you are out flying making observations and coming up with conclusions based on what you see. Then even better after you make your decision you come here and share your experience with your fellow modelrs. You wont always be right and others will chime in and let you know. Some of these guys have been flying longer than I have been breathing (36+ years) and the fact that they are willing to share with us commands our respect and attention.

Now for my OPINION on your situation. Yes it is posible the aluminium spinner saved your engine from damage. A aluminium spinner will be more likely to glance off of rocks and other more dense matter as your model attemts to bury it's self spinner first. However A plastic spinner will "soften" the blow by absorbing some the energy of the impact as aposed to transfering the energy directly to the crank, front bearing and engine housing. The best meathod for engine crash protection is don't crash nose first

... Yes, I understand you had no control in this case; just being a S/A.

< Message edited by Mr67Stang -- 3/1/2007 3:46:21 AM >

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RE: Aluminum spin