Shawn's Shocker

[nata2run]

Lol, read that!!! Its great, but Ive never considered to take it that far. Maybe I'll pay someone to do it. That way I can focus on what I do best.Then one day when I feel like I need to be able to do it, ill learn.

[Chrisg81983]

Yup I used to do every prop that way but it got to be a huge pain in the a$$. Now I only use that method on the high rpm setups otherwise a prop done correctly the standard way is fine for most of my sport setups. You couldn't pay me enough to do it for you lol. Well maybe for you just cause you made my graphics.

[nata2run]

Haha, yep I hear you. There are certain things I wouldnt do for any $$$ but I would do it for the sport of it :)

[Chrisg81983]

Yup I know what you are talking about if someone really wanted me to do it for them I would, but I wouldn't like/enjoy it at all. Getting back to the cnc props I had several standard props from octura that actually slightly shifted the blades from being under so much load/stress ( not from hitting anything in the water ). Now if that was a cnc prop I really think it would of lost a blade as they have no give.

[nata2run]

Yup I know what you are talking about if someone really wanted me to do it for them I would, but I wouldn't like/enjoy it at all. Getting back to the cnc props I had several standard props from octura that actually slightly shifted the blades from being under so much load/stress ( not from hitting anything in the water ). Now if that was a cnc prop I really think it would of lost a blade as they have no give.

Yep you could be right, somethings gotta give! the key in life ...is to the limit... not beyond brake point. So in saying that, push it had but don't brake it. I wonder if your props are still useable or a throw away? if a throw away, you might as well have snapped a blade right?

[srislash]

Allright guys I just got in.I went to the Nickleback concert(we are hometown).

So this shifting of blades Chris,Do you feel they can be used.I thinned a set of ABC's 5016/3's a bit much and bent em a little.I had thoughts of straightening and cutting them down to 45-47.There should be enough meat there then.I probably have a 37"Geico coming(custom) soon to put them on.

You bunch of thread jackers,Haha LOL.No worries mates.Thanks for chiming in Doc W. I have just been balancing real well as guided by Egneg.So far so good,haven't tried the strobe yet but it will come.

[Chrisg81983]

Kent it's not that I care about braking a blade that's the least of the problems. I am worried about it doing damage to the hull like I have seen in the past on others boats. Some of the octura props that were tweaked a little were still useable,and others were garbage.Shawn sorry for jacking the thread !! I have used some damaged props by cutting them down to work on a smaller boat, and they worked fine. So what's this 37 Geico you are speaking of ( sneaky lol )

[1945dave]

Chris what caused the damage you are referring to. The out of balance situation or the projectal of a flying blade?

Dave

[Chrisg81983]

Dave I myself have never used a cnc prop, but the damage I am speaking of is on many of my friends boats. The throwing of a blade on a cnc prop i am guessing was caused by stress either from too much power or too high of rpm. I am sure if you have a cnc prop that is out of balance that can cause braking as well, but these props were worked correctly. As for twisting the blades on a octura prop that was done from a lot of load. I never snapped a beryllium prop only bent blades. Hope this answers your question.

[1945dave]

Hey Chris, I am not fighting anybody here so I won't continue this discussion beyond this post. For almost any fast electric common on this forum the prop is behind the physical hull. I have a problem using the word "thrown" because I don't believe that is the correct term. To use the term thrown that would interchange with the word "sling" as in slingshot. If that is the correct term then I find it hard to believe if not fully impossible to see the prop separating from the hub and going forward past all the strut/stinger hardware and doing hull damage. Now shaking the boat apart because of the out of balance result, now that would be a different story and certainly believable. All I have tried to say from the beginning is that I do believe blades can be broken off. I just do not believe, and that is only my opinion, that excessive rpm's will cause a blade to seperate from the hub and inturn fly into anything causing damage from impact.

Dave

[Chrisg81983]

I am not saying every time a blade is thrown it will do damage to a hull. I seen several situations where they did do damage especially with hulls that have the back of boat that over hangs the transom of the sponsons like many of my cats do. On a standard mono such as a Titan or df with a speed master stinger you of course will be less likely to have a exploding prop do damage. I can 100 percent assure you that stress of high rpm's or a combination of both causes cnc aluminum props throw blades it was not from being out of balance or hitting something. I would maybe think so if it happened to only one person I know, but it has happened to about 7 or 8 people I know. They all know how to work a prop very very well, and even taught me the basics of prop working. They are the people I call when I need some help / info. I am not trying to change your or anyone elses opinion in this matter. All I was doing was asking for some feedback to decide if I would use / try them out as I never used them on my own setups b4.

[1945dave]

Well forgive me for posting one more time. I believe you have cover the subject really well and I see your point. I would be willing to call and discuss this issue with someone that actually manufactures a CNC aluminum prop to see what they feel their props are rated at, if they know. On the other hand I have to agree with your point of view that you need to double check balance anyway and if the reason to consider these props had to do with not needing to balance and sharpen then what is the real point. For about the same money I can buy a "Propshop" or "ABC" prop which require very little work for the same money. From my perspective the real issue is whose prop can produce the best result. Some of the very best and probably some of the most expensive props in our hobby are made and sold by a world record twin Nitro world record holder, John Brown. Also I believe John was one of the first to break the 100 mph barrier. His fully worked and perfection of a prop cost $100.00. In case anyone reading this forum thinks otherwise, not all CNC props are made of aluminum.

Dave

[Chrisg81983]

Dave what's up thanks for your feedback like I said I don't want to change anyone's mind/preference's. I would also would not state there was a problem with a product unless I was 100 percent sure it wasn't caused by human error. Do you know where I can buy CNC stainless steel props. Like I said I personally never owned a CNC prop of any material, but would like to see what a stainless one is all about. Thanks for your time chris g

[nata2run]

Bring on the stainless CNC props :) !!! I'm going to be quiet beyond this post too (on this subject) as I'm still planning on bugging Shawn!!, I have never thrown blades and dont wish to either. Everything said so far from everyone makes sense based on common knowlage, can't change the fact some materials are harder/tougher than others! People that are extreme serious "not you Chris" LOL "Kidding" wouldn't touch an of the shelve prop, but work their own to fit the application. I guess what I'm trying to say is....My Alu CNC props may work ok in the little pond with the speed I'm doing. But for a high performance high RPM setup, it may be risky? and may be possible the aluminium will give at 40K+ RPM resulting in (OMG not to be mentioned) "BAD" I think I will leave it at that......I'll use mine for what I'm doing now, when I step up to 8s (40K Rpm) I will use copper/B or stainless steel props. Then for the photo shoots... I will put on the nice looking CNC props LOL - of all the Stainless Steel Prop Shop props I own, I dont think any would break that easy, thats common sense to me.

[srislash]

I love this.