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T O P I C    R E V I E W
Upright Mike Posted - 01/12/2010 : 16:33:52
Below is my conception of a new idea for an Upright bike fairing.

Some history of upright fairings: Around 1913-1914 the first streamlined human powered vehicle race was held between two faired upright bikes. In 1914 they were banned by the UCI. Former UCI hour record holder Marcel Berthet went 49.99 km in one hour with a faired aluminum upright in the 1930's. He was 47 years old at the time. In 1974 Olympic cyclist Ron Skarin pedaled Dr Chet Kyle's streamlined upright, sewn by Joyce Kyle to a world record 43 mph. This event helped launch the first speed championships in 1975 as well as the IHPVA. Ron remarked that the streamliner swerved with heart stopping unpredictability. In the late 1970's more streamlined uprights emerged to set records. They too had problems with swerving due to their tall thin shapes with large side areas.

In the 1980's fully-faired Moultons (folding bikes with 17 inch wheels) were ridden and raced quite successfully by a team of engineers (Doug Milliken, Dave Kennedy). Jim Glover, Will Kennedy and others were the riders. In 1989, a RAAM team used the AeroEdge fairing. At this time within the HPRA racing circle, only Bryan Tucker http://www.wisil.recumbents.com/wisil/tucker-memorial.htm and myself raced uprights with fairings. With the passing of Bryan, I think I'm the only one left racing them.

I'm not going to build a SAIL like has been done in the past by enclosing the bike and rider top to bottom. I figure something up top and then Aero-Boots (please don't steal my patentable idea) around the bottom should help people to go faster on their uprights. World Record speed for an Upright fairing was set by Jim Glover at I think 52-53 mph on the Indianapolis speedway. My speed lists have him doing 51.2 mph at the 1986 speed championships in Vancouver.

In 1998, I spent about 3 months devised this fairing during a Masters-level engineering problem solving class. My classmates and I found 14 patents related to upright fairings for bicycles. Its an idea I've had languishing now for all these years.

It's not my goal to break this mark, as I know my fairing will not be as aero as some of these earlier fully faired machines. I hope I go at least a respectable 40 mph over 200 meters and maybe 30 miles in one hour. With the design I show, I hope it would be lot more controllable than the earlier fully-faired machines. Someone's got to bring some respectability back to uprights!

I welcome all comments and criticisms!
Mike Mowett



My past experiments with the spandex bag - AeroEdge fairing. This was developed in 1989 for RAAM. I narrowed it, but still only get about 1.5 mph average cruising speed increase (from say 23.5 mph to 25.0 mph) from it. It definitely needs a tail fairing section. - Here I'm doing 37 mph in a 200 meter qualifying run at Battle Mountain in 2005...


Wearing prototype Aero-Boots installed at Battle Mountain in 2005...
These were just cut up detergent and Armor All plastic bottles taped together.
25   L A T E S T    R E P L I E S    (Newest First)
Speedbiker Posted - 12/20/2014 : 13:57:38
I respectfully hope you are actually using lexan or PETG in your windscreen as acrylic creates dangerous edges when broken. If cost is a factor, PETG is very affordable, and it tears rather than breaks at modest temperatures.
AviationMetalSmith Posted - 12/20/2014 : 10:03:37
I should add a few notes about the Type 6, which was pictured, above...
1) The Fairing, or Fairings, the Shell, is made of Five or more parts, and is held together with Pop-Rivets (blind rivets).
2) The Shell is made of Dupont Kevlar, so , yes, some money was involved, although I do recall being slightly "broke" after spending the money on Kevlarô...
3) Only the forward part of the Windshield is Acrylic, the rest is flexible, clear 12 mil thickness Vinyl. The sides are tinted. I had a source of this Vinyl, in my home-town, but the company moved out-of-town:
http://www.tyzall.com/weather-window.html
4) I used a No-Weld Method throughout the Construction.
5) This Velomobile represents an evolutionary dead-end. The Type 7 and the Type 9 used a *different* No-Weld Method, in their construction...

I am wavering on my decision to build another Velomobile... If I say I won't, I will change my mind , and start building one a week later...
But If I do start building,
a) I will use the semi-recumbent "Banana Seat" designed for the Type Ten,
b) I will use all Fiberglass,
c) I will put a hinged , transparent Hatch , in the roof, in case I want to stand on the pedals.
d) It will have all LED Lighting
e) It will be a bit wider, for more "elbow-room".
f) In deference to everything we know about Aerodynamics, it will have the full width "Farm Triangle" Reflector, and the accompanying wide Rear Panniers. I will be unable to taper the tail. I need Visibility in New York Traffic !!!
g) The Shell would have to be One-Piece.
Items a. and c. above will help lower the roof height.
Speedbiker Posted - 12/19/2014 : 22:16:28
Of everyone I know who has built their own faired bicycle and raced at Battle Mountain, none were remotely wealthy as far as I recall. Most are of average financial resource. Most of the top machines were built on a modest budget. Styrofoam and fiberglass are very affordable, yet wonderous, efficient,and fast bicycles can be built.
Grant-53 Posted - 12/19/2014 : 17:44:05
On the 20" bike with a full fairing I would try to clean up the area above the windshield. A front wheel disc might be safe in this case. I have a similar frame awaiting a project but a mountain bike is first on the list.
I noted the rib construction of antique streamliner compared to sailplane construction of aluminum skin over a 1" square tubing space frame.
AviationMetalSmith Posted - 12/19/2014 : 09:30:24
quote:
Originally posted by Speedbiker

Reverse evolution.


Philippe Bunau-Varilla
http://en.wikipedia.org/wiki/Philippe-Jean_Bunau-Varilla
was a millionaire, I'm not.


Speedbiker Posted - 12/17/2014 : 15:26:02
Reverse evolution.
AviationMetalSmith Posted - 12/17/2014 : 10:10:37
[url=https://flic.kr/p/pCYXsJ][/url][url=https://flic.kr/p/pCYXsJ]Bunau-Varilla-Velo[/url] by [url=https://www.flickr.com/people/11629987@N02/]AviationMetalSmith[/url], on Flickr
The Bunau-Varila Streamliner (above), and my "Type 6" (below) for comparison...
[url=https://flic.kr/p/eNLyBr][/url][url=https://flic.kr/p/eNLyBr]Type6Velomobile1990[/url] by [url=https://www.flickr.com/people/11629987@N02/]AviationMetalSmith[/url], on Flickr
Grant-53 Posted - 12/06/2014 : 10:01:11
The only racing I ever tried was pacing the school bus across town on my Huffy 3 spd as a teen. I am 61 and a life long commuter. I ooze along at 10-12 mph on a Jamis Arragon. I see two populations in need of fairings. One is the middle aged man on a mountain bike and the other is a high speed road rider on a triathlon or TT style bike. I spent some time discussing triathlon legal accessories and a scooter shell for motor pacing with Greg Coombs in North Carolina this summer. The adage from motorsport is that there is no substitute for cubic inches, cubic brains, and cubic money. In our case cubic inches translates to VOx.
shooky56 Posted - 12/05/2014 : 13:00:47
tail area: Oh you'd actually said that yourself, sorry for the redundancy. I'm fascinated by your efforts. BTW, I don't race now but, at age 51, I rode my p3c on my 20 mile loop course (not out and back but starts/finishes same spot) at 25.3 mph average. 40 mile loop at 24.0, 10K at 26.3 (out and back), and 5K at 26.8 (out and back). I'm getting old and weak and missed my heyday a bit busy raising kids but it sounds like we are ... or were... similar motors.

About all I focused on was hard training and racing form. Trying to hold the air gremlins at bay :)
shooky56 Posted - 12/05/2014 : 12:54:05
http://i1372.photobucket.com/albums/ag335/shooky56/Cycling/UprightMike1_zps130a78ef.png

Mike: I did mess around with moving the rider some, don't have a frame designer in this yet so the frame is still my recumbent. The upright feature is quite a ways from being usable with any level of convenience but the shape did have a nice teardrop.

On your racing body sock. I think the pressure drag should be greatly improved with the inclusion of a more tapered tail area. It may be possible to use expansion foam to generate that shape, even "outside the sock" like a rear end to the seat. But anything to improve that bluntness at your fear area. Taper could be inside the sock but that might be a bit cumbersome.

Also, did you read (not sure where the link would be these days) that article where a guy who lectures about TT positions "ate crow" about water bottles. The meal was to himself as he said "No bottles on the seat tube". Turns out many riders have lower drag with a seat tube bottle than none at all (keeps you from having 3 points of interruption in the leg area by filling the gap between the legs). Downtube was a no-no. Aerobar shaped bottles were the best of all and actually improved net drag.

Grant-53 Posted - 12/05/2014 : 11:46:05
The big gains in drag reduction seem to be in the tail section.
Grant-53 Posted - 11/29/2014 : 15:32:07
http://i1187.photobucket.com/albums/z385/wgconnor/124.jpg
This is the layout of one of my front fairings. The solid lines are cuts and the dash lines are overlap positions. The shape is secured by using zip ties looped through holes an inch apart.

The Kawasaki windscreen has the curvature to minimize side wind inputs.
timtak Posted - 11/26/2014 : 22:35:21
Thank you for the advice here.

I have attached a Kawasaki motorbike windshield to the front of my bike. I am thinking of bolting another but I may get a Zzipper, but probably not a sock.
[url=https://flic.kr/p/qa6TYE][/url][url=https://flic.kr/p/qa6TYE]
Motorcycle Windshield on Road bike[/url] by [url=https://www.flickr.com/people/64015205@N00/]timtak[/url], on Flickr
Grant-53 Posted - 11/19/2014 : 13:58:17
Welcome Jeff, My father is a Boston U. alumni from the 1950's. First question, do you have drop handle bars or flat bars? Next the distance from your shoulders to your knees is the most important measurement to determine for sizing. Key is mounting the fairing to the frame. I have used two methods successfully. One is to use a u-bolt or muffler clamp to attach a boom to the head tube. The coroplast fairing pictured is attached to the down tube with two zip ties spaced about 3 inches apart. It is made from a 24 x 48 piece of 4mm coroplast for lightness. To gain speed, some type of tail piece is needed. I am working on a set of plans for a complete full fairing for a mountain/hybrid bike. The motorcycle paper model plans on the Yamaha Global site could be adapted to a road bike with drop handle bars or aero bars. I live in western NY 42N 72W just out of reach of the lake effect snows
jeffeng Posted - 11/16/2014 : 13:19:57
Hi all, my name is Jeff. This is an awesome community you guys have built.

I'm writing because I'm interested in making a simple and inexpensive fairing for my upright road bike. I bike-commute all winter, and the primary purpose is to combat the Boston wind/snow/rain. The polar vortex really got to me last year.

It looks like the fairings discussed in this forum might be a great solution. By chance might anyone be able to direct me to a how-to, or suggest a way to get started? I think Grant-53's coroplast designs might be appropriate, but really I'd be grateful for any advice/guidance/suggestions.

Thank you very much in advance!
AviationMetalSmith Posted - 10/22/2014 : 16:14:04

https://flic.kr/p/oNkCe6
Upright Dave Posted - 10/16/2014 : 20:06:27
Getting back to the great picture of Upright Mike standing next to Jim Glover. Ok so your telling me you didn't ask him about the actual gain on those faired moultons? Maybe it's not proper streamliner etiquette but..... I would have asked him.
Upright Dave Posted - 10/04/2014 : 15:35:15
Good post Grant. Too bad they didn't bring those to battle mountain in 2012. Maybe they don't own them anymore. Looks like the soft shell versions only did 39-43mph from the results. Even less when you minus off the 4619 ft altitude and .6% downhill.
Grant-53 Posted - 10/04/2014 : 13:01:01
51.29mph (82.53kph),
unpaced cycling record over 200m

'Liner I broke the unpaced cycling record over 200m (conventional riding position), reaching 50.21mph (80.79kph) at 11th International Human Powered Speed Championships held in Indianapolis in late September 1985. The rider was Jim Glover.


'Liner II about to break the World Speed Record 'Liner II (illustrated), built from 'Liner I, was slightly lighter at 45lbs (20.75kg). At the 12th HPV Speed Championship in Vancouver in August 1986, Jim Glover rode the bicycle to set a new record at 51.29mph (82.53kph), which has yet to be beaten. Nearly 100 HPVs took part, but only a dozen or so were able to exceed 50 mph (80.45 kph).


'Liner III, built from 'Liner II, is potentially faster than either of its predecessors. However, it never fully achieved its potential - circumstances always seemed to conspire against it. In testing though, it has exceeded 55mph (88kph). It was, however, the overall winner at the International Festival of the Bicycle HPV event at Hull, Quebec in 1989.

While Liner's I and II were based on a modified production AM7, the Liner III, is based on a white prototype AM-SPEED and therefore weighed a little less than the 'Liner II. A unicrown front fork was used, similar to that on the AM-ATB, now APB, and the bottom bracket height was increased by jacking-up the rear suspension. This feature had been used in 'Liners I and II, and allowed the chainwheel to be incorporated within the fairing.

The transmission consists of 86 and 82 tooth chainwheels, driving a close-ratio 9, 10, 11, 12 tooth block, thus giving a gear range of 116 - 162".

The fairing, designed and built by Doug Milliken of New York, attaches to the AM's frame via the standard front and rear carrier mounting points. The main body of the fairing is cut from 6mm thick plastic foam-cored artist's board, with the clear panel formed from Lexan. The top and bottom vacuum-formed sections are high impact polystyrene for the opaque sections, and PETG for the clear panel. Aerodynamic wheel disks were added to the accurately balanced wheels, which would spin at about 1,000rpm. 'Liners I and II used standard AM-Wolber tyres inflated to 120psi. The 'Liner III uses Moulton-Wolber slicks run at 140psi.
I found this description of the Moulton record bikes. If I remember correctly Doug Milliken was associated with Calspan in Buffalo, NY.
Upright Dave Posted - 10/02/2014 : 11:34:14
Checked my top speed today at 406 ft elevation, 75 degrees temp.

Run1 35.42mph 52/15 gear
Run2 35.47mph 52/14 gear
Grant-53 Posted - 10/01/2014 : 09:43:55
Having the fairing attached to the frame instead of the handlebars does away with crosswind instability.

Tuft testing my front fairing showed turbulence around the front brakes.

The Rocket tail cone of Oscar Egg duplicates an aircraft style tail.

I am sorting through the pictures I took at the National Sailplane Museum.

A road bike capable of 30-35 mph would be a success.
Upright Mike Posted - 09/22/2014 : 02:29:45
quote:
Originally posted by Upright Dave

Thanks for the replies guys. I'll let you do the headtube mount Grant. I've spent way too much time on this thing for little gain.

One thing still ponders my mind. Given: An Olympic level sprinter can do 42-45 mph with no fairings and maybe some chemicals.

How much extra speed did Jim Glover really get out of the 51mph full upright streamliner? Assuming he was an Olympic level cyclist..............or was he?


Hi Dave, Jim Glover was and is a pretty strong cyclist, but I don't think he was on the Olympic team. He is a cycling coach now. Here we are with the Moultons back in 2012 at Battle Mountain, when they were brought out of "retirement" to be ridden by Will Kennedy and Jim Glover. I think maybe these photos are posted somewhere already earlier in this thread but I'll post them anyway again.

PS: I think you might be discovering what I discovered too. There is a lot of work to do for an upright fairing (though you've now done much more work than me, who just bought mine!), for not a lot of gain. A full fairing would undoubtably give more gain, but more heart attacks because they sail and swerve in even the lightest of wind gusts. So.... a recumbent is the way to go!

http://www.recumbents.com/wisil/whpsc2012/resultstuesday.htm
Battle Mountain 2012 - Left to Right
Dave Kennedy, Will Kennedy, Jim Glover, Mike Mowett


The original upright king of speed bike - though Jim Glover rode a hard shell version I think...

Upright Dave Posted - 09/20/2014 : 19:06:13
Thanks for the replies guys. I'll let you do the headtube mount Grant. I've spent way too much time on this thing for little gain.

One thing still ponders my mind. Given: An Olympic level sprinter can do 42-45 mph with no fairings and maybe some chemicals.

How much extra speed did Jim Glover really get out of the 51mph full upright streamliner? Assuming he was an Olympic level cyclist..............or was he?
Grant-53 Posted - 09/16/2014 : 13:21:27
[URL=http://s1187.photobucket.com/user/wgconnor/media/SAM_0106.jpg.html][/URL]

This what I have been looking to do and you can see the similarity. Still suggest you mount the Zzipper to the head tube. Definitely awesome! Whether a tail or a fin you'll be able to keep up with Rocky the Flying Squirrel;)
Upright Mike Posted - 08/24/2014 : 09:35:02
That looks awesome Dave! Having a tail was something I always wanted! (Wait that doesn't sound right!)

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