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Bryan Mailloux · 06-19-2005, 09:22 PM

I have finally found the right prop for my os 46 fx. Apc 12-4 This flys my spad3dt. The problem is my local hobby shop doesn't carry that exact prop. A 11-5 seems to work ok.
Ok my problem. I was given a torpedo 12-4 prop. white in colour and when revved up it seems to howl. Is this normal? The prop seems to be quite flexable.

AJCoholic · 06-19-2005, 09:56 PM

Bryan,
I advise NOT to use those old nylon props! Unlike the newere APC or Master Airscrew props, there is NO fibre reinforcement in them, thats why they are so flexible. They also become very britle with age, and are not a good idea to use on a modern, higher power engine.

Its not worth losing an eye over... ditch the old nylon prop IMO.

Guest · 06-19-2005, 10:16 PM

Man get rid of that prop even when they were used you were supposed to boil them before using to help stop them from coming apart. THROW IT OUT!!!!!!!!!!!!!

Dennis

davey · 06-20-2005, 09:51 AM

There's a website in the US run by Grish Products that sell Tornado props. If they are the same ones, does the advice above apply to all Tornado props? I understand they are very efficient performers that can give great thrust.

I agree with the APC giving better performance than MS in the same size, at least with the 40 and 60 size planes I tried both with. The other one that has been good for me is Graupner. They are a few dollars more but are quiet and seem to pull very
well.

[/url]

*flysrcs* · 06-20-2005, 10:49 AM

Brian,
I have a spare APC 12x4 and don't see needing it in the near future. I'll put in my flight box and you can have it. I'll be down for the otterville funfly.
Dave Woon

AJCoholic · 06-20-2005, 11:28 AM

I wouldnt use ANY brand of pure nylon prop, on a modern engine. Yes, a lot of them were used in the past. But also a lot broke! They are actually very inefficient as they flex and twist out just watch one run.

They are great for the smaller engines, like the 1/2 to 09 stuff but no way would I use one today with anything else. Thats just my opinion... remember they are pure nylon without any fibres to reinforce them. They can get very brittle and break. They did require special care (like boiling to reintroduce water into the nylon to make it less brittle).

Inroad · 06-20-2005, 12:49 PM

what Andrew said

Gregg L

Bryan Mailloux · 06-20-2005, 07:20 PM

I will loose the prop. Thanks guys I know it made me nervous.

*flysrcs* · 06-20-2005, 10:58 PM

Brian,
I went out to the shop to put the prop in my box when I realized it was an APC 11-4. Let me know and I'll bring it if you want to give it a try. Sorry about that.

Dave

06-19-2005, 09:22 PM	#1
Bryan Mailloux RCC Master Contributor I am: Bryan M Join Date: Oct 2003 Location: Norwich Feedback: 9 / 100% Posts: 1,496 Total Props: 2	props Remove this ad - become a site supporter! I have finally found the right prop for my os 46 fx. Apc 12-4 This flys my spad3dt. The problem is my local hobby shop doesn't carry that exact prop. A 11-5 seems to work ok. Ok my problem. I was given a torpedo 12-4 prop. white in colour and when revved up it seems to howl. Is this normal? The prop seems to be quite flexable. __________________ MACH 1 MAILLOUX FJG?
	.

06-19-2005, 09:56 PM	#2
AJCoholic RCC Supreme Contributor I am: Andrew Coholic Join Date: Sep 2002 Location: Timmins, Northern Ontario Radio of choice: JR 12X, 28X Feedback: 47 / 100% Posts: 12,277 Total Props: 61	Bryan, I advise NOT to use those old nylon props! Unlike the newere APC or Master Airscrew props, there is NO fibre reinforcement in them, thats why they are so flexible. They also become very britle with age, and are not a good idea to use on a modern, higher power engine. Its not worth losing an eye over... ditch the old nylon prop IMO. __________________ Andrew Coholic -MAAC #26287L 1/2A to giant scale, IMAC, SAM, R/C sport, turbine jets, Heli's... if its got a wing or two and an engine - I like it!
	.

06-20-2005, 09:51 AM	#4
davey RCC Junior Contributor I am: David DeLuca Join Date: Nov 2002 Location: Timmins, Ontario Radio of choice: FRSky Feedback: 0 / 0% Posts: 139 Total Props: 0	There's a website in the US run by Grish Products that sell Tornado props. If they are the same ones, does the advice above apply to all Tornado props? I understand they are very efficient performers that can give great thrust. I agree with the APC giving better performance than MS in the same size, at least with the 40 and 60 size planes I tried both with. The other one that has been good for me is Graupner. They are a few dollars more but are quiet and seem to pull very well. [/url] __________________ David DeLuca "Pilots are Plane people with a certain Air about them"
	.

06-20-2005, 11:28 AM	#6
AJCoholic RCC Supreme Contributor I am: Andrew Coholic Join Date: Sep 2002 Location: Timmins, Northern Ontario Radio of choice: JR 12X, 28X Feedback: 47 / 100% Posts: 12,277 Total Props: 61	I wouldnt use ANY brand of pure nylon prop, on a modern engine. Yes, a lot of them were used in the past. But also a lot broke! They are actually very inefficient as they flex and twist out just watch one run. They are great for the smaller engines, like the 1/2 to 09 stuff but no way would I use one today with anything else. Thats just my opinion... remember they are pure nylon without any fibres to reinforce them. They can get very brittle and break. They did require special care (like boiling to reintroduce water into the nylon to make it less brittle). __________________ Andrew Coholic -MAAC #26287L 1/2A to giant scale, IMAC, SAM, R/C sport, turbine jets, Heli's... if its got a wing or two and an engine - I like it!
	.

06-20-2005, 12:49 PM	#7
Inroad RCC Junior Contributor I am: Gregg L Join Date: Dec 2002 Location: Vernon BC Radio of choice: Specktrum # of RCs: 10 Feedback: 4 / 100% Posts: 208 Total Props: 0	what Andrew said Gregg L __________________ Started with nothing,got most of it left MAAC 11800
	.

06-19-2005, 10:16 PM	#3
Guest Guest Join Date: Sep 2002 Feedback: 0 / 0% Posts: 0 Total Props: 57	Man get rid of that prop even when they were used you were supposed to boil them before using to help stop them from coming apart. THROW IT OUT!!!!!!!!!!!!! Dennis
	.

06-20-2005, 10:49 AM	#5
flysrcs ~~BANNED PEOPLE~~ I am: Dave . Join Date: Oct 2002 Location: NewMarket Radio of choice: DX 18 Feedback: 4 / 100% Posts: 1,501 Total Props: 5	Brian, I have a spare APC 12x4 and don't see needing it in the near future. I'll put in my flight box and you can have it. I'll be down for the otterville funfly. Dave Woon
	.

06-20-2005, 07:20 PM	#8
Bryan Mailloux RCC Master Contributor I am: Bryan M Join Date: Oct 2003 Location: Norwich Feedback: 9 / 100% Posts: 1,496 Total Props: 2	prop I will loose the prop. Thanks guys I know it made me nervous. __________________ MACH 1 MAILLOUX FJG?
	.

06-20-2005, 10:58 PM	#9
flysrcs ~~BANNED PEOPLE~~ I am: Dave . Join Date: Oct 2002 Location: NewMarket Radio of choice: DX 18 Feedback: 4 / 100% Posts: 1,501 Total Props: 5	Brian, I went out to the shop to put the prop in my box when I realized it was an APC 11-4. Let me know and I'll bring it if you want to give it a try. Sorry about that. Dave
	.

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