TRICYCLE, FAMILY

TRICYCLE FAMILYThree weeks it took me to collect parts of old bikes recumbent double the pleasure type. Rapid wedge-shaped profile suggested a name for the new machine — a “Sail”. It turned out onlinefreeroll, easy and strong enough. Low rise creates a purely automotive sense of speed, elongated frame and padded seat well conceal the tremors of the bumps in the road.

We went on the “Sail” two and even three with a small child on her lap. The total mileage was more than 300 km. So we can conclude: the task is to create comfortable bench valmasino increased power (due to the introduction of the second pedal) is solved successfully.
 
R and S. 1. Recumbent Parus
R and S. 1. Recumbent “Sail”:
1 — body-fairing. 2 — bracket steering, 3 — wheel, 4 — spinal tube frame, 5 — back arc of the body 6 opposite the connecting rod. 7 — bracket Dobby unit, 8 — seat 9 — apron (oilcloth wrapping the body), 10 — pull steering, 11 — a plug of the lever of the steering wheel.
 

And now more about the structure of the recumbent.
 
Layout. The machine is made in three-wheeled configuration, two independent leading of the rear wheels and one front, steering. It is rational, as it allows to simplify power circuit design and control system. Minimum turning radius is 2.5 m. At a bodyweight of 40 kg velomobile speeds up to 25 km/h.
 
Fig. 2. The frame of the velomobile (complete)
Fig. 2. The frame of the velomobile (complete):
1 — steering column to the fork of the front wheel 2 from the Central part of the frame, the 3 — strut steering, 4 extension cable steering, 5 — wheel, 6 — right Central connecting rod bottom bracket (with elements of velorama and rear plugs), 7 — paired rod right drive (sprocket not shown) 6 — right side frame, 9 — base seat, 10 — scarves (cot), 11 — fork rear wheel (with elements of velorama), 12 — back arc of the body, IZ — pillar, 14— the left side of the frame 15 is a left Central connecting rod bottom bracket (with elements of velorama and rear plugs), 16 — paired rod left drive,17 — tube frame fairing,18 — coupling the coupled connecting rod 19 — tie rod end, 20 — fork-lever 21 — steering column upgraded fork from the “Student”), 22 — upper and lower cross frame 23 to force the crossbar.

 
Location chain drives asymmetrical: the driver is on the left, inside the body, and the passenger made right for the dimensions of the body. This is especially true if the passenger seat sits a woman in a dress or a child: the chain does not interfere and does not stain. Moreover, such setting of the drive allows you to use wheels road bike with virtually no alterations.
 
Fig. 3. Force frame
Fig. 3. Power frame:
1 — the upper crossmember,2 — cowl, 3 — side top tube of the frame,4 — force cross member,5 — a scarf 6 — rear cross member, 7 plug 8 — back arc of the body,9 — stand, 10 — spinal tube, the Central part of the frame (the latter is conventionally not shown).

 
The center of gravity of the recumbent is located so that the rear wheels have about 70% of the load. Thanks this is mu provided a good stability of the machine, the PA turns when riding alone, and together. The role of the differential is made by staff freewheel rear wheels.
 
Fig, 4. Getting the power unit side of the frame
Fig, 4. Getting the power unit side of the frame (2 pieces).
 
Body frame and shell structures made from tubes of the bike frame and the old cots and decorated with leatherette and a dining room with oilcloth. Conventionally, the body can be divided into a power rack and fairing.
 
Fig. 5. Spinal tube Central of the frame
Fig. 5. Spinal tube Central of the frame.
 
Force frame. All connections are made with screws M5 with the use of rails, plates and clamps from bike frames and cot.
 
Procurement the Central and lateral parts of the frame and the bottom bracket shell nodes are performed with allowances for fit IO growth.
 
Coupling. They are necessary to connect the rod side of the carriage and pedal Central carriage.
 
Fig. 7. The steering unit Assembly.
Fig. 7. The steering unit Assembly.
 
When making them at home can recommend the following technology. Cut off from the eaves of the pipe end to a length of 50 mm (a little more). File done two semicircle with a radius of 2-5 mm. Placed on the plate bearing No. 80200 and cover it with a billet clutch, cut down. Hitting the hammer on the workpiece, press-fitted into it bearing. Neela make longitudinal slits and remove the excess metal. In places thoroughly flexible fillet all the corners with a file and make fillets. Then turn down the tabs and drill holes of 0 6 mm in accordance with Fig.
 
It remains to establish the coupling in accordance with a pattern and check whether you can easily revolve the pedal.
 
Steering. The steering unit is mounted with a support on the left of the Central bottom bracket. The intermediate fork lever made of parts front fork and front frame ladies bike; completion plugs: one feather cropped, the second bent, and PA the end holes of 0 6 mm for fixing the tie rod that attaches it to the fork of the front wheel. The pushrod length is 230 mm.
 
Fig. 8. Coupling.
Fig. 8. Coupling.
 
The steering extender is made of a pipe from a clamshell. A wheel of a Bicycle “the Schoolboy” contained therein regular taper.
 
Transmission. The recumbent has two single-stage chain transmission made of parts and components road bike. The selected transfer type with brake bushings rear wheel is well suited for short trips with low speed. For longer trips it is advisable to have 3 or 4 additional stars.
 
Body-fairing. On the power frame is rigidly mounted body-fairing of pipe cots. It is made along with frame, covered with leather and oilcloth and carries the power load. The size of the hood and its shape is dependent on the desires of the constructor n the assignment of the recumbent.
 
Seat is protected with oilcloth. Initially I put on the recumbent Polycom, but it has not justified itself as an asymmetrical load at the front wheel when tricycle scheme requires a very rigid frame. From dirt and spray it will protect the apron from the mantle tissue.
 
Fig. 9. Coupling Assembly with the pedal and rod
Fig. 9. Coupling Assembly with the pedal and rod:
1 — rod, 2 — bearing (No. 80200), 3 — clutch, 4 — pedal.
 

 
Such decisions allowed to light and just repaired the body of bright colors, which is important for security in the General flow of traffic.
 
“Sail” everywhere arouses interest and a desire to ride it, the more that everyone understands: it’s not a bike, it does not require a special pre-riding skills.
 
And really, to make sure the advantages of such transport is easy enough to sit behind the wheel and press the pedals.
 
A. EGOROV, design engineer, Kolomna, Moscow region

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