Volantex Phoenix 2000 V1 motor mount

Volantex Phoenix V1 (TW-742-III, 2m wingspan) is quite old but still used by lots of rc pilots - even with flight controllers and/or fpv equipment. 

A short time ago I had a look at my old but almost unused Phoenix and thought about upgrading it using a bigger motor which I found sleeping in one of my drawers (Aeolian 3542) ... too heavy, too powerful and yes, I know, it's only a glider ;-) ... but some things - once thought - simply has to be done just for fun. There's plenty of room in Phoenix' nose but the motor didn't fit the original mount - longer shaft / different screw hole pattern. I found a similar adapter on Thingiverse made by DrVork for an ntm3530 but this motor has an even longer shaft. In addition the adapter was too small to integrate nuts or to use washers for motor screws - so I had to create my own.

It suits the original fuselage and motors with 19/25 hole pattern and flat mounting surface. Screw holes are countersunk for use with washers (dia 7mm) to better distribute surface pressure. Fixing holes to fuselage have 5.5mm hexagons on their backside - after printing push in 4 M3 nuts and fix them with a bit of CA or other suitable glue to keep them in place for assembly. Needless to mention that rounded edges of the adapter have to face forward. They fit the front fuslage radius and keep the adapter centered.

Beside the version for my Aeolian (19mm shaft) I added 2 other variants for 20 and 21mm (e.g. ntm3530) shaft length or 3rd party spinners/props which may require different spacing - cad data are included (igs) in case you need another thickness or geometry. For smaller adjustments simply use washers between motor and adapter.

The motor mount should be printed with PETG or ABS to withstand higher motor temperatures. I used Overture PETG (for printing params also see 3mf file). I used Prusa's "snug" supports for the hexagons - easy to remove but may also work without.

Printed weight (t=7mm for 19mm shaft): 5.63g 

Printing params (Prusa):

• Nozzle 0.4 / Layer height 0.2

• Temp: 225/220°C (first/other layers)

• BedTemp: 80/75°C (first/other layers)

• Cooling: 30% (constant)

• 4 walls (only 1 at top and bottom)

• Width 0.42/0.45/0.4mm (first/other/top)

• 7 bottom and top layers

• Infill 25% 3D honeycomb

• Speed 40/30/45/30/50mm/s (walls/otr wall/infill/top/supports)

• Supports: yes (snug style)

• No retract on layer change / no wipe while retract / retract and lift for travel >1mm only

• Retraction speed 30mm/s, length 0.4mm (for direct extruder)