9/9/22 Reinforcing the vectored bearing holders
Colin Szeto
The 7mm stub broke off, there was an attempt in utilizing a 6-32 ⅞ socket head screw. This was broken when the drone platform was being stowed in between the pontoons and the cart stuck the top platform of the wam-v
Side view cross section
Currently the
Side view with the hole extended through the entire part
Able to add screw to reinforce
Button head screws will interfere with the 8020 rail that the cart slides on
Could have the screw head on the outside of the part
section analysis bearing holder with flat head
The flat heads doesn’t intersect the 8020
The clearance between the edge of the flat head and the bar is 4 thousands of an inch
The screws used in the bearing cart (all screws multiplied by 8)
9/5/22 updated placement of the drone landing platform based off fitment on the actual boat
Colin Szeto
Updated placement of the drone landing platform.
The left side of the frame is aft the right side of the frame is the forward part of the boat.
The drone platform is long enough to fit between the emo battery, battery for the electronics box, and the torqeedo batteries. However, this leaves very little space for the racquet ball launcher.
9/1/22 Finalized version of Drone Landing Platform Structure
Colin Szeto
This section overviews the decision making on why 1020 construction was selected in creating the drone landing platform
Link to File here
The bearings intersect with the existing solution for mounting the 8020 cross braces on the bottom of the 8020 rail
An alternative solution was to use the 8020 part number 2565
Part website here
However each of these angled profiles had a unit cost of 20 dollars. This would come up to a minimum of 160 dollars if we wanted to support the horizontal rails
An alternative solution was devised to utilize 1020 bars (1 in by 2 in) as the support
This usage of 1020 allows the carts to freely move along the bars with providing support the construction.
This top view illustrates the landing platform will be amply supported
This triple bar configuration would not have provided ample support for the landing platform.
Parts list and supporting documents: here
8/31/22 Laying out Electronics + First Two Sided Test
Colin Szeto
Added in the battery and emo box representation onto the top of the wam-v platform
File location:
Electronics > “laying out on the top of the platform”
Construction of all 4 sides of the landing platform
The longer bars compressing
Thinking of utilizing steel cables to make a criss cross pattern to introduce rigidity to the design
Reference here
By the end of the day utilizing off cuts this was the current configuration of the drone landing platform. A solution for supporting the landing plate the drone feet will interface with has yet to be designed.
8/15/22 Assembly and First Test of Drone Landing Platform Single side
Colin Szeto
Opening of the carts
When the motor is reversed the carts roll towards the center of the bar
8/14/22 Fabricating Drone Landing Platform
Colin Szeto
The parts were printed in black PLA as that is what was available at the moment.
This is a gash on one of the 3d printed parts as the preheated hot end dragged through the completed spool. This was due to the 3d printed spool jamming and the print continued without extruding filament.
Reference on how to save 3d prints here
The print height was measured at the spool height, as the hot end was moving to other parts on the print bed the nozzle grazed through the spool. After recollecting the correct height the print failed and the print was able to be resumed.
8/13/22 Building the Motorized platform v2
Colin Szeto
The objective here is to utilize the vectored bearing design first implemented in the HSI testing rig. This allows the elimination of the friction fully 3d printed spools.
To the left we have the vertical spools. This allows for packaging as well as aligns all of the spools.
Note the green line represents the path of the string
3/20/22 Drone Landing Platform Progress
- Limited to no machining required
- No alterations to the WAM-V platform
- Provide assurance that drone will not slip off platform
- Allow space for mounting batteries and electronics on the platform away from the water line of the the WAM-V
- Utilizing 8020 extrusions and brackets to create the landing platform
- Attaching the platform to the WAM-V with ratchet straps
- Including pitched walls on the edges of the platform
- Elevate the landing platform to accommodate space for the electronics
- Ratchet straps are not a good permanent solution as they can expand and contract. Usage of straps take away from the craftsmanship of the WAM-V. We can replace the ratchet straps with metal pieces or we can drill into the WAM-V platform and secure the drone landing platform into the WAM-V with bolts.
- The pitched walls will provide little in securing the drone onto the platform. Actuators that clasp the drone when landed would be more effective in keeping the drone on the platform. This is similar to the Planck Aerosystems design for their line of products.
20230508 Tuning In the O-Ring Size
Parker handbook 4.3 Face Type Seals “Face type seals are sometimes rectangular. In designing such a seal to receive a standard O-ring, th...
