Motor stand offs

[Robert Putley 1]

I have purchased a Phoenix Models Sebach 1.45mm model,and i intend to powered with an electric motoe rather than glow which I think this model is for.They say it can be also powered by an electric motor but the fittings for this are inadequate.

 

I needmotor stand offs of approx 10cms. Where can I purcase these as the longest I have found so far are only 8cms in length.

[Frank Skilbeck]

Robert, just make up a spacer plate out of ply to make up the 2cm difference.

 

On a couple of my larger electric models (1600 watts) I spaced the motor from the bulk head with studding and lock nuts, might not be as elegant as purpose sized spacers, but it's been OK for the last 5 years.

[Richard Ashworth]

For small 10 mm standoffs I would use 8, (double thickness) 1cm square 5mm ply plates as washers.

Mark them out and drilling them before cutting makes them much easier to handle.

 

[Tim Ballinger]

Try 4-maxStand-offs . Anything up to 15 cm by the look of it.

Tim

[Shaun Walsh]

3 hours ago, Tim Ballinger said:

Try 4-maxStand-offs . Anything up to 15 cm by the look of it.

Tim

As the 100mm ones are out of stock currently, bear in mind that you can't cut these down as they are not hollow/threaded through the entire length (I made that mistake).

How about something like this?

Ply motor mount

Not sure about the length but a quick call should sort that out.

Alternatively buy some M3 threaded rod, some M3 nyloc nuts and some 3.5mm or 4mm  i.d carbon fibre or aluminium tube. Cut 4 tubes to 100mm, slide tube over threaded rods and mount one end to firewall and the other to the cruciform motor mount or indirectly via a ply plate with the nyloc nuts

Robert's your father's brother!

[Shaun Walsh]

Or one of these

Great Planes motor mount

 

Extends to 117mm apparently

[Robert Putley 1]

Morning all !!

 

                  Many thanks for all your ideas and solutions  I shall have a closer look at these late in the day.

 

It may take a few days, but I shall let you know in  which direction I choose to go.

 

Thanks again.

[leccyflyer]

23 hours ago, Robert Putley 1 said:

I have purchased a Phoenix Models Sebach 1.45mm model,and i intend to powered with an electric motoe rather than glow which I think this model is for.They say it can be also powered by an electric motor but the fittings for this are inadequate.

 

I needmotor stand offs of approx 10cms. Where can I purcase these as the longest I have found so far are only 8cms in length.

I use threaded rod and the appropriate ID aluminium tube as spacers, both are straight from the metals aisle at B &Q.

[Eric Robson]

I use the same system with 1/4" ply plates and nuts and washers instead of stand offs on 5mm threaded rod. Side and down thrust can then be set up as needed.

[leccyflyer]

Indeed one of the joys of using the threaded rods and aluminium tubes is that side and downthrust can very easily be set with a different number of washers between the motor mount and the standoff. The way I do it uses two radial mounts, but you could get by with using ply plates, which I've also used in the past.

[Robert Putley 1]

Hello, thank you all very much indeed for ll the above advice. i shall most likely go in the direction of stand offs. Not yet quite made up my mind.

 

Thanks again.

[Geoff S]

I use a similar system but using washers rather than a second motor mount (but I may well copy that idea!).  It's just necessary to offset the firewall end to the left a touch so that any right thrust gets the prop into the centre, which it looks as though you've done, Leccy.

 

Geoff