Monday, February 28, 2022

Trek 2022 Domane SL5 (Sweet spot, great ride, not a climber)

 I had the pleasure of riding the SL5 Trek Domane, which really made me want to go out and ride more. It is a great platform for cruising / on-off road cyclocross style, and absorbs bumps like a sponge. 

  • Baseline: Specialized Allez Elite 2011 58cm (XL) Frame with Tiagra 18 Speed Groupset
  • Tektro Rim Brake. 23mm Gatorskin Tires
  • 480mm wide handlebars
    • Front Wheel Shimano WH-R550: 1200g (incl. tires)
    • Rear Wheel Shimano WH-R550: 1800g, rim alone 1170g
    • Front Wheel Shimano WH-7900: 1100g (incl. tires - Gatorskin 23mm)
    • Rear Wheel Shimano WH-7900: 1450g
  • Trial Bike: Trek Domane SL5. Shimano 105 Groupset
  • 32mm tires
  • Disc Brakes
  • 460mm wide handlebars
    • Domane SL5 Total Mass: 10.21KG
    • Front Wheel: 1550g
    • Rear Wheel:  2025g
The main Domane challenge is taking it racing. It is a great platform -- just not for racing.
Trek may consider how they challenge the competition for race bikes which are used for other purposes also. 

[Update] See my Canyon CF SL 8.0 Review in a later post. Lighter and still relatively comfortable.

Thursday, January 27, 2022

IFR Abbreviations & Terms. Concepts

Notes from IFR course

* next to Tower -- Indicates Part Time Operation. Note in Approach Brief.

APP CON - Approach Control

CCCCC ("Five Cs")- Cram, Climb, Clean, Cool, Call

CRAFT - 

CTAF - 

CTC - Contact (as in "Contact Potomac APP CON")

FAF - Final Approach Fix

GCO - 

GUMPS Check - Gas, Undercarriage, Manifold, Prop, Switches (Fuel pump, landing light)

Hold in Lieu Of - Procedure Type

HSI - Horizontal Situation Indicator (Heading and NAV in one place) Directional Gyro which displays VOR CDI - Course Deviation Indicator. OBS Omnibearing Selector to set VOR Radial.

IAF - Initial Approach Fix

Identifier - 3 Letters for VOR or other NAVAID

LNAV - 

LOC - Localizer

Localizer Course - Chase the Needle (normal sensing). "Feather" symbol. Backcourse (pull the needle)

Shaded side of feather, aircraft is to the left. 

"LOC Alive" - Call out. We've established a signal from the localizer.

Lubber Line- HSI White Mark at top indicating course heading - like with reading a compass.

MAP

Marker Beacons-

Minimums- 

Missed Procedure-

MSA - 

(P) - PAPI - Precision Approach Path Indicator

Plan View - Top Down view of IFR Approach Plate diagram

Power - check Manifold Pressure (Constant Speed Prop)

Profile View - Sideways view of IFR Approach Plate diagram

PTAC - Position - Turn - Altitude - Clearance.

RNAV

Sector - Portion of Procedure with certain altitude limitations or other restrictions

SID - Standard instrument departure

S-ILS

TCH - Threshold (Runway)

VORTAC - VOR + TACAN


Headings are Magnetic

Altitudes above Field


Sunday, January 19, 2020

Backyard Drainage Design. BOM and Parts List

I am laying out a backyard gutter runoff and drain design system.
The system will incorporate two elements:
(1) Solid Pipe Runoff collection and diversion system
(2) French Drain style collection system, possibly to tie into the runoff collection.
YouTube has a number of great examples which I am using to spec my design.

Home Depot BOM:

Qty 1 @ $76.96 = $76.96 #04510100 Advanced Drainage Systems 4" x 100 ft. Corex Solid Drain Pipe. Used for roof drain spouts to convey water far away from foundation
Qty 2 @ $ 2.82  = $ 5.64 #0432AA 4" Plug HDPE
Qty 4 @ $ 6.28 = $25.12 #4P08 4" PVC 45 Degree Hub Wye (For Cleanout at Gutter Vertical)
Qty 4 @ $ 2.57 = $10.28 #904 NDS 2 in. x 3 in. x 4 in. Styrene Offset Downspout Adapter
Qty 3 @ $ 8.93 = $26.79 #0422AA 4" HDPE Snap Wye Coupling

Amazon BOM:

Qty 1 @  $ 6.48 = $6.48 Christy's 02-4122 2-Inch Wide by 100-Feet Long 10ml Thick Tape
Qty 1 @  $127.29 Mutual NW35 Non Woven Geotextile Polypropylene Fabric 300' Length x 6' Width
[For Foundation / French Drain Style Application]


Design Inputs and other factors:
Roof Area: 1200 sqf (estimated)
800-1000 Gallons of runoff per 1" of rain to be diverted to sloped front yard (sloped towards street)
Soil composition: Heavy Clay
Footer facing inwards
Crawlspace
Poor previous drainage noted by water in the crawlspace

https://theconstructor.org/geotechnical/foundations/foundation-drain/28069/
https://www.bobvila.com/articles/french-drains/

Sunday, October 27, 2019

944/924s Hatch and Fan Relay

I have fixed a problem with the hatch opener and the interior fan not functioning by re-seating the relay in it's place on the fuse panel under the dash. Now however, the same problem has occurred again. The hatch can still open by key, and the interior fan is not mission-critical, so I am considering a brand new relay or pulling it to disassemble and check the contacts and spring function. After 30+ years it's probably time for a new relay.

[Dec 2019 Update] After seating a second time and replacing a worn radiator hose, the system while running hot in stop and go traffic, is remaining cool during highway driving.

Monday, September 30, 2019

Dyneema Rigging Pictures


Side Stay (1/4" Brummel Splice & Thimbled both ends) with 7/64 Dyneema Lashing (3-4 turns sufficient, clove hitched)


3-Loops Lashing (7/64)
Grey colored Forestay (1/4"), Green Tangs (2 x 1/4" to furler) and sidestays (1/4")
Lash to adjust tension. Stays straight.






Monday, September 16, 2019

Amsteel Dyneema Stretch

[Tags: Jasmine, Hobie 20, Rigging, Dyneema]

We tried the lashing method with 1/4" Samson Amsteel Dyneema yesterday and the stretch amount was in excess of 1 foot for a 22 foot length. This is on par with the 6.67% Stretch that they show in the Samson application instructions for a 30 foot line at 2 feet of stretch. All in all, that stretch length must be factored into the line length and lashing plan. If not, you will end up with a dramatically under-tensioned rig.

On my second iteration of line length calculation, I undersized the shroud by around 1 foot, but Samson's notes would indicate that the amount should be 1.5 feet (per 22 feet) minimum. There are multiple sources of line elongation including:

-> Constructional Elogation (fibers setting into a tighter bundle)
-> Splice Elongation (strands settings into each splice - 2 in my case, one at each thimbled end)
-> Elastic Elongation (recoverable stretch in the line. recovered when load removed - small for HMPE/Dyneema)

Elongation will increase as loading increases regardless of the line construction.
Shock loading (pulsing of a load) will increase the elongation amount.

Hobie Wire Lengths (Subtract 18 inches from these figure to allow for stretch and lashing setup)
https://static.hobiecat.com/2010_archive/support/pdfs/WireGuide.pdf


Stainless Fitting Distributors

Berkley Point

Unicorn Stainless

Christine Joy
Suncor Stainless Inc.
70 Armstrong Road
Plymouth, MA  02360
(800) 541-6829
(508) 732-1013
(508) 732-9798 Fax