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Other › Here is where your CP will most likely break
11-12-2005 01:46 PM  12 years agoPost 1
rdlohr

rrKey Veteran

Pittsfield. MA USA

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Here is where your CP will most likely break, and ideas for how to repair it.

I'm starting this topic to provide a quick comprehensive place to go to predict where the CP is likely to break and collect up the innovative ways people have fixed it.

I have a brand new CP and I intend to reinforce areas that tend to break prior to them actually breaking. My plan is to use black thread and CA to do most of the reinforcement, but depending on what ideas get posted I will do whatever seems best.

Please include pictures, links, and anything else that will help other people. Please be concise and try to avoid too much repetition


-#-> Still Flyin, crashin and lovin it!

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11-12-2005 02:02 PM  12 years agoPost 2
ESWLFSE

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Liberty Hill, TX

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Mine would always break right at the blade tips.

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11-12-2005 03:42 PM  12 years agoPost 3
c mark smith

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Mt Vernon, Indiana

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Most of my damage starts at the blade tips and works inward.

The blade holder ball broke off one time, the blade holder shaft has bent and been straightened several times, as has the fly bar for the paddles, the main shaft has been straightened more than I care to relate, the hole is walloered in the shaft due to many, many flights, and the plastic piece the drive pin goes through is walowed as well,,,,,,,,,,,

I've never damaged a skid, ever, nor the tail boom.

I did brbeak the tail skid 'hole' off and CA'ed it back to only fall off mid flight,,,,,,,

The training gear is tough, but i did manage to lose one rod in the grass, grass is bad , bad, bad !

Hope this helps,,,,,,,,,,,,,,,,,

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11-15-2005 04:35 PM  12 years agoPost 4
BikeNBoatN

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Santa Ana, CA USA

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Don't know if this thread is still active or not, but I thought I'd add my experiences. The landing skid where the upright attaches to the horizontal skid breaks easily on hard landings. On harder landings the two rear skid mounts break off the main frame. On really hard landings the boom breaks off the main frame. Otherwise, it's mainly main rotor blade tips. I wrap the tips of my blades with clear packing tape and that helps quite a bit. The only things I've broken on the rotor head are ball links coming off, and those aren't anything that can be reinforced ahead of time anyway.

Brent.

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11-15-2005 07:13 PM  12 years agoPost 5
cudaboy_71

rrElite Veteran

sacramento, ca, u.s.

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helicopters break when they crash. there's no way around that. the energy from the sudden decelleration has to go somewhere. given that, the idea is to make sure your model breaks at the CHEAPEST, EASIEST to replace location.

anyone concentrating on preventing parts from breaking is going at the problem all wrong. it'll only cause another part to fail somewhere else in the chain.

the problem deisgn-wise is that different flying styles stress different parts. so we can't blame the designers/manufacturers. but, if the cheapest, easiest to change part is always breaking on you, then smile and know you have a well designed model for your flying style.

if it ain't broke, break it.

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11-16-2005 01:16 AM  12 years agoPost 6
rdlohr

rrKey Veteran

Pittsfield. MA USA

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All great input so far, thanks! Keep them coming please!


-#-> Still Flyin, crashin and lovin it!

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11-16-2005 01:20 AM  12 years agoPost 7
rdlohr

rrKey Veteran

Pittsfield. MA USA

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cudaboy_71: Although there is a lot of truth to what you are saying, sometimes there are little things you can do to make life easier and possibly cheaper when crashes occur. I'm hoping this thread will continue to collect the best ones and help out a lot of people. I'll bet you have some!


-#-> Still Flyin, crashin and lovin it!

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11-16-2005 02:37 AM  12 years agoPost 8
cudaboy_71

rrElite Veteran

sacramento, ca, u.s.

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rdlohr: that's all fine. there are things that can be done to help a part resist breaking. that's great (tho i dont have any suggestions off hand). i've just seen a few of these threads turn into 'how to battle armor a heli' topics. everything is so rigid, from aluminum landing gear, to fiberglass skids, aluminum reinforced frames, etc. that the heli gets far too heavy, or it causes very expensive repairs when a crash does happen due to lack of shock absorption.

just a warning is all i was giving.

a case in point, one of the best designs i've seen was in the hummingbird FP v1....the thing had hardly any glued joints. the struts and most of the frame were just .08" CF rod, held together with small bits of fuel tubing. i've flown that thing full bore directly into a tree trunk before. the think very nearly completely disintegrated. but, absolutely nothing was broken; the head popped completely off, saving the blades; nearly every one of the CF rods came off, even the tail rotor came off. i walked over, gathered my parts, spent about 5 minutes putting it all back together and was back up in the air. i really loved that design.

just something to keep in mind when you're beefing up your parts.

if it ain't broke, break it.

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11-16-2005 10:49 PM  12 years agoPost 9
rdlohr

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Pittsfield. MA USA

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Thanks cudaboy_71! You gotta love it. I've got an XRB that I have had similar experiences with. I laminated the styrofoam blades with packing tape and fly with the tail and canopy off. The resulting heli is almost indestructable. "Almost" I say since I'm sure that I'll find a way to kill it eventually!


-#-> Still Flyin, crashin and lovin it!

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