By continuing to use this site, you agree to our use of cookies. Find out more
Forum sponsored by:
Forum sponsored by CML

APC tiny bite

All Topics | Latest Posts

Search for:  in Thread Title in  
Tom Major12/12/2017 16:59:54
avatar
94 forum posts
22 photos

Hi.

As some of you know, my old P.A.W. is now soaking in fuel in an attempt to free contrapiston from cylinder liner. I figured out that I could finally test run little .10FP after major cleaning and putting new gaskets in.

So I got everything ready and went out. Spinner I chose didn't really like my starter, so of course I started to flick prop by hand. It did kick back few times, but my fingers were so cold I didn't feel anything, just carried on.

It was getting dark already, but I noticed some dark fluid on the prop, much darker than Contest 10 I was using.

image.jpeg

Then I had a look at kicked finger and noticed tiny cut and some blood dripping down. I packed all my stuff with dissappointment and went to wash my hands, also pulled away those little bits of skin hanging loose.

image.jpeg

image.jpeg
image.jpeg

Funny thing that I told her indoors just few minutes before going out that APC props are known as rotating scalpel blades .

The point of this post is not to cry and look for compassion, I'll live laugh. I just wanted to post it as a reminder to always be as safe as possible and minimise the risk involved. I didn't and got a quick lesson, am also very happy it was just a little kick and not a proper cut at 10k rpm - don't think I'd be able to glue my finger back where it once was...

What a rookie mistake laughlaughlaugh

Bob Cotsford12/12/2017 17:05:34
avatar
7683 forum posts
427 photos

Those APC props will easily cut you without even a sniff of a kickback. If you really want to hand start without a chicken stick, try the reverse flick method. I've found it works on pretty much everything I've tried and you are pushing the blunter side of the prop.

cymaz12/12/2017 17:06:16
avatar
8202 forum posts
1135 photos

Ask your good lady to get you a CHICKEN STICK for Christmas.....embarrassed

Tom Major12/12/2017 17:08:30
avatar
94 forum posts
22 photos

Once was quite enough, I'll just change spinner next time or wait till next day when it's not getting dark already.

I also ordered one 6x3 for little Testors McCoy with missing starter spring laugh...

Engine Doctor12/12/2017 17:25:55
avatar
2142 forum posts
20 photos

Hi Tom . Sand down the flashing on any prop before hand starting especially APC props ,they are lethal . Sand until you get a smooth blunt edge then check for balance by balancing the prop on a spindle . Sand the heavy prop until it stays where you put it . Glow engines will become with an electric starter as they have lower compression ratio. 

Edited By Engine Doctor on 12/12/2017 17:27:05

Tom Major12/12/2017 17:28:22
avatar
94 forum posts
22 photos

That could be good idea, never before heard about sanding the props yes

Nigel R12/12/2017 17:37:18
avatar
2325 forum posts
389 photos

APC are vicious things, sharp as knives, straight out the packet, sand the edges as E.D. says, and give them a balance. On the plus side APC usually don't need much effort to balance.

Tom Major12/12/2017 17:45:53
avatar
94 forum posts
22 photos

I've never had one before and tbh was quite surprised when I saw what it did. In the past I got kicked by Master Airscrew, Zingers mounted on 2 strokes and four strokes, Cox props, few electric props and some others, only bled once or twice as far as I remember. Now this was just a touch. Nasty little things them APCs smiley

Peter Miller12/12/2017 18:19:16
avatar
9660 forum posts
1143 photos
10 articles

Most props need sanding. I have actually carved balsa with a Master airscrew.

Console yourself with the thought that at least you did not need stitches.

Edited By Peter Miller on 12/12/2017 18:21:23

onetenor12/12/2017 18:55:02
avatar
1881 forum posts

If you had put that skin chip back into place with a firm dressing it would have been fine in a few days Frog and KK props both Nylon and plastic were notorious for sharp flashings. I used to scrape them off with a knife.Not try and cut them as you could nick the prop which would lead to loads of work to correct the problem

Jon - Laser Engines12/12/2017 19:07:51
4328 forum posts
159 photos

A foot long piece of broom handle will save your digits. I had start every engine I make at Laser and my wooden stick has saved me a few times.

Don Fry12/12/2017 19:09:02
avatar
3130 forum posts
38 photos

Nothing wrong with them out of the packet. De sharpen them loses efficiency. Use a stick, or a stater. Don't touch.

Edit. I am blessed with a short SWMBO. She has never noticed that broom handles are eight inches shorter in use than at point of sale.

Edited By Don Fry on 12/12/2017 19:11:28

Don Fry12/12/2017 19:15:30
avatar
3130 forum posts
38 photos

Bye the bye, that is a kiss from a prop. A bite, is you are on the ground, and wondering is you want to get up, get in the car, and get to casualty, without killing someone.

Why do flesh in the prop arc?

Don Fry12/12/2017 19:20:29
avatar
3130 forum posts
38 photos

And looking closer, you have an unusual ridge mark pattern on your finger. The central worl pattern is very small and discrete. Don't do crime, you will be a low hanging branch.

Edited By Don Fry on 12/12/2017 19:21:58

Tom Major12/12/2017 20:55:57
avatar
94 forum posts
22 photos

Don Fry
I am law abiding citizen laugh.

Onetenor
Yeah but it would be pretty annoying for next few days. I need my hands to be sort of operational as I work with dogs that weight more than I do and some of them do pull a lot .

I have an old valve grinding stick that is not used at all, think I will keep it at hand just in case. I also think my electric starter rubber insert might need to be replaced as it doesn't grip very well.

gangster12/12/2017 21:24:36
avatar
867 forum posts
12 photos

Interesting if you try to order a chicken stick on eBay. The search comes up with all sorts of dog treats

Frank Skilbeck12/12/2017 21:30:30
avatar
4251 forum posts
101 photos
Posted by gangster on 12/12/2017 21:24:36:

Interesting if you try to order a chicken stick on eBay. The search comes up with all sorts of dog treats

Some here too chose from

Mike Stevens13/12/2017 06:06:04
avatar
463 forum posts
57 photos

Nicks and cuts quite normal with diesels laugh

Tim Flyer13/12/2017 06:23:15
avatar
884 forum posts
145 photos

I always sand APC props too . Any minor loss of efficiency is very insignificant compared to loss of skin on fingers. I hope your hand heals quickly. Luckily the good blood supply it has will help😊

Edited By Timothy Harris 1 on 13/12/2017 06:24:10

Peter Miller13/12/2017 08:30:24
avatar
9660 forum posts
1143 photos
10 articles

I was doing pit crew in combat. My assistant didn't hold the model properly. The prop broke on my thumb bone resulting in three stitches and a weeks leave spent sitting with my thumb held up level with me head.to ease the throbbing

The owner of the model said "You broke my prop" and the next day complained that he could not get the blood stains of his cylinder head.!!

All Topics | Latest Posts

Please login to post a reply.

Magazine Locator

Want the latest issue of RCM&E? Use our magazine locator link to find your nearest stockist!

Find RCM&E! 

Latest Forum Posts
Support Our Partners
Wings & Wheels 2018
Airtek Hobbies
Motion RC
Gliders Distribution
CML
Revoc
Overlander
electricwingman 2017
Slec
Sarik
Advertise With Us
Latest "For Sale" Ads
Which part of building a new traditional balsa aeroplane do you enjoy the most?
Q: Which part of building a new traditional balsa aeroplane do you enjoy the most?

 Research & choosing the model
 Building the fuselage
 Installing the engine and radio systems
 Building the flying surfaces
 Covering/painting/finishing
 All of it!
 None of it. I'd rather someone else did it!
 Other

Latest Reviews
Digital Back Issues

RCM&E Digital Back Issues

Contact us

Contact us