diff --git a/uni/mmme/2xxx/2044_design_manufacture_and_project/images/seals-019.png b/uni/mmme/2xxx/2044_design_manufacture_and_project/images/seals-019.png
new file mode 100644
index 0000000..6ef218c
Binary files /dev/null and b/uni/mmme/2xxx/2044_design_manufacture_and_project/images/seals-019.png differ
diff --git a/uni/mmme/2xxx/2044_design_manufacture_and_project/images/seals-044.png b/uni/mmme/2xxx/2044_design_manufacture_and_project/images/seals-044.png
new file mode 100644
index 0000000..3d11a74
Binary files /dev/null and b/uni/mmme/2xxx/2044_design_manufacture_and_project/images/seals-044.png differ
diff --git a/uni/mmme/2xxx/2044_design_manufacture_and_project/images/seals-045.png b/uni/mmme/2xxx/2044_design_manufacture_and_project/images/seals-045.png
new file mode 100644
index 0000000..80d1805
Binary files /dev/null and b/uni/mmme/2xxx/2044_design_manufacture_and_project/images/seals-045.png differ
diff --git a/uni/mmme/2xxx/2044_design_manufacture_and_project/images/seals-046.png b/uni/mmme/2xxx/2044_design_manufacture_and_project/images/seals-046.png
new file mode 100644
index 0000000..8b4a129
Binary files /dev/null and b/uni/mmme/2xxx/2044_design_manufacture_and_project/images/seals-046.png differ
diff --git a/uni/mmme/2xxx/2044_design_manufacture_and_project/images/seals-047.svg b/uni/mmme/2xxx/2044_design_manufacture_and_project/images/seals-047.svg
new file mode 100644
index 0000000..1dd2b10
--- /dev/null
+++ b/uni/mmme/2xxx/2044_design_manufacture_and_project/images/seals-047.svg
@@ -0,0 +1,596 @@
+
+
+
+
diff --git a/uni/mmme/2xxx/2044_design_manufacture_and_project/images/seals-056.png b/uni/mmme/2xxx/2044_design_manufacture_and_project/images/seals-056.png
new file mode 100644
index 0000000..959113a
Binary files /dev/null and b/uni/mmme/2xxx/2044_design_manufacture_and_project/images/seals-056.png differ
diff --git a/uni/mmme/2xxx/2044_design_manufacture_and_project/images/seals-057.svg b/uni/mmme/2xxx/2044_design_manufacture_and_project/images/seals-057.svg
new file mode 100644
index 0000000..a9905a5
--- /dev/null
+++ b/uni/mmme/2xxx/2044_design_manufacture_and_project/images/seals-057.svg
@@ -0,0 +1,686 @@
+
+
+
+
diff --git a/uni/mmme/2xxx/2044_design_manufacture_and_project/images/seals-059.png b/uni/mmme/2xxx/2044_design_manufacture_and_project/images/seals-059.png
new file mode 100644
index 0000000..75c45bd
Binary files /dev/null and b/uni/mmme/2xxx/2044_design_manufacture_and_project/images/seals-059.png differ
diff --git a/uni/mmme/2xxx/2044_design_manufacture_and_project/images/seals-060.png b/uni/mmme/2xxx/2044_design_manufacture_and_project/images/seals-060.png
new file mode 100644
index 0000000..1b57b4f
Binary files /dev/null and b/uni/mmme/2xxx/2044_design_manufacture_and_project/images/seals-060.png differ
diff --git a/uni/mmme/2xxx/2044_design_manufacture_and_project/images/seals-061.png b/uni/mmme/2xxx/2044_design_manufacture_and_project/images/seals-061.png
new file mode 100644
index 0000000..b037a63
Binary files /dev/null and b/uni/mmme/2xxx/2044_design_manufacture_and_project/images/seals-061.png differ
diff --git a/uni/mmme/2xxx/2044_design_manufacture_and_project/images/vimscrot-2022-11-07T15:17:10,365197721+00:00.png b/uni/mmme/2xxx/2044_design_manufacture_and_project/images/vimscrot-2022-11-07T15:17:10,365197721+00:00.png
new file mode 100644
index 0000000..1ef4278
Binary files /dev/null and b/uni/mmme/2xxx/2044_design_manufacture_and_project/images/vimscrot-2022-11-07T15:17:10,365197721+00:00.png differ
diff --git a/uni/mmme/2xxx/2044_design_manufacture_and_project/seals.md b/uni/mmme/2xxx/2044_design_manufacture_and_project/seals.md
new file mode 100755
index 0000000..ab0e0c8
--- /dev/null
+++ b/uni/mmme/2xxx/2044_design_manufacture_and_project/seals.md
@@ -0,0 +1,157 @@
+---
+author: Akbar Rahman
+date: \today
+title: MMME2044 // Seals
+tags: [ uni, mmme2044, seals ]
+uuid: ff74e8ad-090d-47eb-b9cc-41ccdefb9a63
+---
+
+# Function
+
+- used to prevent or limit leakage of fluids or particulates
+- keep dirt out
+- allow motion
+- allow disassembly
+
+# Classification of Seals
+
+
+
+## O-Rings
+
+- good for static and low speed applications
+- requires interference fit
+- application is codified---use a standard where possible (BS 4518:1982, BS ISO 3601-1~5)
+- sized by internal diameter (ID) and section diameter (A)
+- works by having the rubber o-ring squeezed against the two surfaces
+
+ - pre-compression ensures sealing when there is no pressure
+
+### Challenger Space Shuttle Disaster
+
+- Space Shuttle Challenger broke apart 73 seconds into flight
+- at the low temperatures, the o-rings lost their resilience
+- the booster cases distorted during launch
+- insufficient groove width in o-ring design
+
+
+
+### Common Forms of Failure
+
+- Abrasion---sealing face is worn away. Can be reduced with smoother surfaces, harder materials,
+ better lubricant, and reduced speed
+- Compression set---the sealing face is permanently distorted. Can be solved with more temperature
+ resistant o-rings
+- Installation damage---can be avoided with chamfers and blending radii
+- Extrusion---the o-ring is forced into the sealing clearence. can be avoided with:
+
+ - smaller clearances < 0.13 mm;
+ - harder material
+ - different cross section
+ - backup rings---come in a range of shapes and sizes (BS 5106:1988)
+
+- Spiral damage---o-ring is twisted and leaks. can be avoided with:
+
+ - lower reciprocating speed
+ - harder material
+ - different cross sections (e.g. quadrant seals, which have a x-shaped section)
+
+# Groove Dimensions
+
+- up to 100 bar for static loading
+- up to 14 bar & 3.8 m/s for dynamic loading
+
+> i don't know when this is the case but it just says this in the
+> [lecture slides](./lecture_slides/Lecture 6 Seals_v1.0.pdf)
+> (and i haven't watched the lecture yet)
+
+- $F$---radial depth
+- $E$---groove width
+- $G$---total clearance
+- $C$---lead-in chamfer
+- $R$---radius
+
+## Groove in Cylinder
+
+
+
+## Groove in Piston
+
+
+
+## Example of a Dimensions Table
+
+
+
+# O-Ring Properties
+
+Material | Hardness (Shore A) | Temperature Range ($^{\circ}$C) | Uses
+-------- | ------------------ | ------------------------------- | ---------------
+Nitrile rubber | 70 | -30 to 110 | general purpose, fuel, oils, water
+Silicone | 70 | -60 to 200 | medical, body fluid resistant, low temp, alcohol, oxygen
+Viton (fluorocarbon) | 85 | -20 to 200 | high temperature, extreme chemicals
+Polyurethane | 95 | -30 to 110 | high temps, oil, gas, hydraulics, good wear
+
+Shore A context:
+
+Item | Hardness (Shore A)
+------------- | ------------------
+Rubber band | 20
+Pencil rubber | 40
+Tire tread | 70
+Shoe heel | 80
+
+# Gaskets
+
+- a material or combination of materials clamped between two separable members to form a joint
+
+## Gasket Anatomy
+
+1. Base material---a compliant element such as cork, cellulose, or a fibre
+2. Binders---temperature and chemical resistant material such as rubber, elastomers, and resins
+3. Fillers---fill voids in base material. usually rubbers, elastomers, or resins
+4. Reinforcements---prevents distortion. usually a metal or fabric core
+
+
+
+# Seals in Rotating Shafts
+
+- low pressure and low temperature---o rings, radial lip seals, axial lip seals
+- high pressure---high performance lip seals, mechanical seals
+- high temperature---labrynth seals
+
+## O-Rings
+
+- o-rings can be used in dynamic applications
+- friction is high but sealing is good within operating range (14 bar, 3.8 m/s)
+- surface roughness must not exceed 0.4 mm Ra, should be around 0.1 mm Ra
+- spiral and abrasion are main failure modes, if installed correctly
+
+# Radial Lip Seal Anatomy
+
+- low pressure---0.3-0.6 bar, up to 7 bar with backing plate
+- moderate speed---up to 16 m/s
+- high temperature
+- normal environmental conditions
+- slight leakage permitted
+- normally made of nitrile rubber compounds
+
+
+
+
+
+## Types of Lip Seal
+
+- BS ISO 6149-1:2007 defines 4 basic types of rotary shaft lip seal:
+
+ 
+
+ 
+
+ - $D_1$---nominal diameter of shaft
+ - $D_2$---nominal diameter of housing
+ - $b$---nominal seal width
+ - $A$---air side
+ - $B$---fluid side
+
+