Garden Railway Forum

Phil.P wrote: ↑Sun May 22, 2022 11:37 am Steve, Rik,

Many thanks for your efforts! - I did wonder if a propeller / fan would be awkward to print..

Quite a complex shape to draw.
Having messed with model planes, in a previous life, It will be interesting to see the result.

Thank you again! - Now all I will need to do, is finish them.

Phil.P

I too am an ex model plane fanatic, flying everything from super fast foamies, through to 111cc 10ft wing span fully aerobatic models, I even entered a couple of competitions at one point The 4 blade fan I have just tried, suffice to say you need a VERY light chassis with VERY free running bearings. I am going to use 3mm ball bearings in mine once I design it. Not the most efficient prop I have ever seen, maybe the 2 blade might be more efficient?

I have had to make a couple of change to the CAD work as the motor does not fit unless you want to take out 0.3mm manually, so I have redesigned one with a 0.4mm bigger hole, this works and is far easier to fit a motor inside. I have also changed the back plate for the same reason. Just reprinting them now.

All the best
Steve

Well... I can confirm the 2 blade is FAR more efficient, which is how I thought it would be. The 4 blade was super noisy, had to spin flat out whereas the 2 blade is half throttle and much quieter.

Here is the 2 blade, I did not video the 4 blade as it struggled to get around. I didn't try reverse, I will later, lol.

A couple or so pictures.

Please ignore all the lines on mine, they are done on lowest quality prints and are purely for testing.

Must admit, I didn't try putting mine together. I just printed them off. Hopefully, you should be able to make something with them, Phil.

Rik

Just so everyone knows, the fan is also way more efficient if you leave the protection cover off. I am not going to fit mine, if someone is stupid enough to stick their hand in a fan, which can only be accessed from the rear and makes one hell of a screaming sound, then who am I to argue with natural selection

-steves- wrote: ↑Sun May 22, 2022 4:14 pm if someone is stupid enough to stick their hand in a fan, which can only be accessed from the rear and makes one hell of a screaming sound, then who am I to argue with natural selection

Reminds me of a time, MAAAANY years ago at school. We had built a propeller driven, aircraft diesel engine powered, R/C controlled, racing car. In trying to start it in the normal way by flicking the prop, it kicked...and I still have a large scar on my finger to prove it! Back then of course, 'elf n' saftee didn't exist. However there was a positive bonus, my English Language O Level exam was the next day and I had a large dolly on my finger so a note was attached to my paper explaining that I was incapacitated... and that is how I passed my O Level at the third attampt!

Steve,
Excellent! That passed the smile test.


I had thought a 'commercial' 3-blade propeller, might be an option?

Phil

Rik,

Something just blew-in with the Postman..

Thank you!

Hoping to get mine in the post Wednesday for Thursday / Friday delivery. Not forgotten, just delayed.

Also my track brush has been keeping my very busy indeed in the spare micro seconds, I think it's on V4 now and still needs work

Honestly, my life is a soap opera, it really is, most things that happen are just so surreal!

Roll on more running days

Phil.P wrote: ↑Mon May 23, 2022 2:30 pm Rik,

Something just blew-in with the Postman..

Thank you!

Glad it has arrived safely

Rik

OK, wrapped up, hopefully being collected tomorrow, so should be with you on Thursday.

A few little extra bits in there, hope you can make use of them.

Intriguing...

Post has arrived...

Stern looks, from Domestic Authorities..

One parcel from Peter Binnie. - Strange! I seem to have ordered four chassis.

So now I have the major components of three 'Windy'..

Steve, thank you for the other bits and pieces. They raise a number of questions, but probably for a different time and place?

(But did you intend to drop a motor in the box?)

The power of the Community, wins again.
Another 'thank you' to you both.

Phil Partridge.

Phil.P wrote: ↑Thu May 26, 2022 3:15 pm Post has arrived...

Stern looks, from Domestic Authorities..

One parcel from Peter Binnie. - Strange! I seem to have ordered four chassis.

So now I have the major components of three 'Windy'..

Steve, thank you for the other bits and pieces. They raise a number of questions, but probably for a different time and place?

(But did you intend to drop a motor in the box?)

The power of the Community, wins again.
Another 'thank you' to you both.

Phil Partridge.

Yes, I have loads and loads of motors and I just wanted to make sure you had something that fitted, it's a 3v-6v motor.

Hopefully all of the contents was useful?

Yes, thank you..
Payment made.

Thanks again Steve,
Phil.

For anyone Vaguely interested:
The 'quick' distraction-project, has grown wings (propellers?)..
The performance (on a windy day, and roughly thrown-down track) was disappointing.

The wind blew 'Windy' backwards, and there was not enough 'oomph' to get up the slopes..

The Tamiya liquid cement, doesn't seem to work-well, with Binnie plastic. - Axle-boxes fell off, but that is good, as I am hunting for metal wheel-sets.
Flanged bearings, are on their way from the USA..
The hunt for a commercial propeller, continues..

No pictures, until I have something running better. - I am not going to paint, until I know if I am going to have to chop things about..

Phil.P