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Search: Posts Made By: astronomerroyal
Showing results 1 to 50 of 89
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Forum: Utility Cycling
01-24-11, 08:58 AM
Replies: 91
Views: 129,876
Posted By astronomerroyal

Thanks. Other than address the height difference,...

Thanks. Other than address the height difference, the front part provides some rigidity. Without it the chassis (for the most part made of 1" aluminium angle) would be too flexible. I did consider...
Forum: Utility Cycling
12-20-10, 09:35 AM
Replies: 91
Views: 129,876
Posted By astronomerroyal

Bicycle trailer Sketchup 3D design

I don't think I ever posted this here, but a couple of years ago I made a fairly faithful SketchUp 3D model of my bicycle trailer. This trailer is the 3rd and final version, which I've been enjoying...
Forum: Utility Cycling
01-11-10, 03:17 PM
Replies: 715
Views: 399,575
Posted By astronomerroyal

I know what you mean. 120+35lbs is a very large...

I know what you mean. 120+35lbs is a very large load. I wouldn't be at all surprised if the rubbery feeling is from frame bending and rear tyre deformation. I get lurching with my trailer when...
Forum: Utility Cycling
07-29-09, 07:34 PM
Replies: 715
Views: 399,575
Posted By astronomerroyal

Ah, a flaw in the design (pardon the pun). What...

Ah, a flaw in the design (pardon the pun). What do you think about the stability? I thought I had a good feel for engineering a trailer but my first trailer was quite unstable. Ever since then...
Forum: Utility Cycling
07-27-09, 08:21 AM
Replies: 715
Views: 399,575
Posted By astronomerroyal

It's a nice looking trailer. I looked up its...

It's a nice looking trailer. I looked up its specs



Weight 11.4kg / 25lb
Weight capacity 30kg / 66lb


which is not a terribly impressive weight:capacity ratio. A bicycle weighs...
Forum: Utility Cycling
06-27-09, 12:04 PM
Replies: 15
Views: 4,373
Posted By astronomerroyal

does that require extra hardware? Securing the...

does that require extra hardware? Securing the feet seems to be the solution. what sort of tripod is that? It looks interesting - one of those with a stem that can be turned horizontally?
...
Forum: Utility Cycling
06-27-09, 09:33 AM
Replies: 15
Views: 4,373
Posted By astronomerroyal

Sorry, no solution from me - I'm in the same boat...

Sorry, no solution from me - I'm in the same boat as you. I've been after an alternative ever since my tripod snagged on a footbridge sending me onto the handlebars - the bungees then catapulting me...
Forum: Utility Cycling
06-22-09, 02:21 PM
Replies: 37
Views: 22,054
Posted By astronomerroyal

Flexible rubber, I see, ...

Flexible rubber, I see,

http://evc.cocolog-nifty.com/okochama/images/2008/10/05/us_patent3829125_cannondale_bugger2.jpg

Some bicycle inner tubes would probably be just as good.

I've found...
Forum: Utility Cycling
06-22-09, 08:12 AM
Replies: 37
Views: 22,054
Posted By astronomerroyal

Greg, I'm sorry I can't help you - just wanted...

Greg,
I'm sorry I can't help you - just wanted to thank you for bringing this trailer to my attention. Was the hitch some sort of universal joint that attached to the seatpost? Very interesting...
Forum: Utility Cycling
06-08-09, 07:42 AM
Replies: 8
Views: 2,968
Posted By astronomerroyal

I suspect you'll get some energetic feedback. ...

I suspect you'll get some energetic feedback.

I don't want to be a misery-guts but 50lbs is a lot of dog, and combined with everything else will make for a heavy - and unstable - load. More than...
Forum: Utility Cycling
06-01-09, 07:39 AM
Replies: 21
Views: 1,376
Posted By astronomerroyal

This site may help quantify how difficult it is...

This site may help quantify how difficult it is to cycle up hills,

http://bikecalculator.com/veloMetricNum.html
Forum: Utility Cycling
05-20-09, 05:03 PM
Replies: 219
Views: 111,947
Posted By astronomerroyal

Thanks. No fish-tailing, but I'm fairly slow...

Thanks. No fish-tailing, but I'm fairly slow (~12mph). Yes, Michigan's a lovely place. Wish I had more time here - still trying to work out how to get to the Upper Peninsula from Ann Arbor with a...
Forum: Utility Cycling
03-23-09, 08:13 AM
Replies: 715
Views: 399,575
Posted By astronomerroyal

Brilliant idea. interesting hybrid sort of...

Brilliant idea. interesting hybrid sort of hitch. Does it perform well? Torsional issues?

Recently I needed a pulley for a motorized camera dolly I'd built - found an old bottom bracket. ...
Forum: Utility Cycling
02-23-09, 10:08 AM
Replies: 30
Views: 31,953
Posted By astronomerroyal

Yes, yes, you should put this in one/both of the...

Yes, yes, you should put this in one/both of the sticky threads. I almost missed this thread because I usually just visit the stickies.

It's a very nice trailer - beautifully proportioned. ...
Forum: Utility Cycling
12-14-08, 09:48 PM
Replies: 20
Views: 1,193
Posted By astronomerroyal

The bicycle generator shown is 12volts, 0.5Amps...

The bicycle generator shown is 12volts, 0.5Amps (picture 1). It comes out AC but it's more useful as DC, so you use a 'rectifier' which turns the snakey AC signal into a camel-humpy DC signal. The...
Forum: Utility Cycling
12-14-08, 09:05 PM
Replies: 20
Views: 1,193
Posted By astronomerroyal

If you ever go touring with the trailer you could...

If you ever go touring with the trailer you could consider a dynamo, enabling you to charge a phone, ipod etc. Nicely complements a solar panel.

The headlight on the front of the trailer has the...
Forum: Utility Cycling
11-17-08, 08:18 AM
Replies: 715
Views: 399,575
Posted By astronomerroyal

I think this is the most enjoyable way to use...

I think this is the most enjoyable way to use trailers, to snake around corners. The sheer mass of cargo is also another great feature that further diminishes the presumed advantages of a car. I...
Forum: Electronics, Lighting, & Gadgets
11-04-08, 09:17 PM
Replies: 5
Views: 722
Posted By astronomerroyal

Ah, thanks. I'll probably see what I can get my...

Ah, thanks. I'll probably see what I can get my hands on. I've not encountered anyone with actual experience complaining about the combination - seems to be worth a shot. Can always use it in a...
Forum: Electronics, Lighting, & Gadgets
11-03-08, 07:17 PM
Replies: 5
Views: 722
Posted By astronomerroyal

Hub generator in a 16" wheel. Would it work?

I recently built a bicycle trailer for touring etc. It has two 16" wheels. I was toying with the idea of using a hub generator for power. On my previous trailers I used an old-fashioned sidewall 12v...
Forum: Utility Cycling
10-31-08, 01:05 PM
Replies: 715
Views: 399,575
Posted By astronomerroyal

Very nice. What does the dog haul, and during...

Very nice. What does the dog haul, and during 'dogrest' does it get to travel on a blanket?
Forum: Bicycle Mechanics
10-31-08, 12:56 PM
Replies: 14
Views: 1,715
Posted By astronomerroyal

I was rather surprised at how easy it was to cut...

I was rather surprised at how easy it was to cut the new thread. Fortunately it's only for holding the rack. The rack was on there for a year with only one leg and nothing bad happened to that...
Forum: Bicycle Mechanics
10-27-08, 08:40 PM
Replies: 14
Views: 1,715
Posted By astronomerroyal

Can't believe all this was a year ago. ...

Can't believe all this was a year ago.

Yesterday I was perusing the taps at the hardware store and bought a 1/4" tap and #7 drill bit (as the tap package instructed). Drilled hole,...
Forum: Utility Cycling
10-27-08, 08:31 PM
Replies: 91
Views: 129,876
Posted By astronomerroyal

Post 73 in the 'Post your trailer' sticky thread...

Post 73 in the 'Post your trailer' sticky thread shows the universal joint hitch. Mine's from the steering column of a golf cart.
Forum: Utility Cycling
10-27-08, 09:28 AM
Replies: 219
Views: 111,947
Posted By astronomerroyal

Trailer train. Recycling beer bottles. This...

Trailer train. Recycling beer bottles. This resulted in a 20USD refund (Michigan.)
Forum: Utility Cycling
10-27-08, 09:24 AM
Replies: 715
Views: 399,575
Posted By astronomerroyal

25 mph with a trailer? I'm not surprised you...

25 mph with a trailer? I'm not surprised you experience a slight weave.
Forum: Utility Cycling
10-27-08, 09:19 AM
Replies: 91
Views: 129,876
Posted By astronomerroyal

the suspension trailer I made in post #38 was...

the suspension trailer I made in post #38 was deemed a failure because the overhead required to make a suspension system added considerably to the weight. Also, the intrinsic flex of the trailer bed...
Forum: Commuting
10-27-08, 09:02 AM
Replies: 10
Views: 864
Posted By astronomerroyal

I've sent this URL to my friend and he wishes to...

I've sent this URL to my friend and he wishes to pass on his sincerest "T. Hanks." He's not equipped to adapt a used bike, but some of these urban bike models look very good. The Scott SUB made my...
Forum: Commuting
10-25-08, 02:06 PM
Replies: 10
Views: 864
Posted By astronomerroyal

Bike request: 26", rigid fork ...

The facts:

1) My friend is buying a new bike for commuting.
2) He's only used hybrids before, for commuting.
3) I'm a year-round commuter and use a 26" mtn bike w/ rigid fork, and I've...
Forum: Utility Cycling
10-14-08, 07:13 AM
Replies: 2
Views: 1,085
Posted By astronomerroyal

Do you have a photo? Obviously a different...

Do you have a photo? Obviously a different riding style may help, but I expect you're after a mechanism that has lateral freedom but not vertical. Placing the hitch lower to the ground, where the...
Forum: Utility Cycling
10-06-08, 07:59 AM
Replies: 941
Views: 559,688
Posted By astronomerroyal

Or perhaps a trailer? I made one and it has had...

Or perhaps a trailer? I made one and it has had a profound effect on how I do my shopping. A man machine love affair.
Forum: Commuting
09-08-08, 05:04 AM
Replies: 55
Views: 5,118
Posted By astronomerroyal

Trousers yes. You can't go birdwatching without...

Trousers yes. You can't go birdwatching without trousers.
Forum: Utility Cycling
09-07-08, 07:42 PM
Replies: 6
Views: 1,127
Posted By astronomerroyal

If the wheel axle is only attached to the chassis...

If the wheel axle is only attached to the chassis on one side then there's a bending moment (or torque) that will cause the problem you describe. The solution is to either have a really strong...
Forum: Utility Cycling
09-04-08, 07:00 AM
Replies: 9
Views: 15,983
Posted By astronomerroyal

I think you've hit upon the important issues...

I think you've hit upon the important issues there. Depends what you want from the trailer & experience. I spent about 150-170USD on building my first trailer (excl. s&H costs), mostly new parts...
Forum: Commuting
09-03-08, 08:49 AM
Replies: 55
Views: 5,118
Posted By astronomerroyal

I just noticed that street view photographed me...

I just noticed that street view photographed me several months ago, doing some (re)cycling, on my way to the woods, to do some birdwatching.

Recycling....
Forum: Utility Cycling
08-20-08, 03:33 PM
Replies: 20
Views: 1,474
Posted By astronomerroyal

To whom is the question posed? In my case...

To whom is the question posed?

In my case the double trailer feels no different than a single trailer. The only difference would be the extra rolling resistance, which was always only a small...
Forum: Utility Cycling
08-17-08, 10:19 AM
Replies: 20
Views: 1,474
Posted By astronomerroyal

Bikipede

I once posted some pictures of The Bikipede a.k.a Velocipede. I'd also like to add, with complete smugness, that the Universal Joint hitch means no towbar clearance issues. Take that, bikesatwork....
Forum: Utility Cycling
08-17-08, 10:10 AM
Replies: 6
Views: 785
Posted By astronomerroyal

CCR, your description sounds very plausible. ...

CCR, your description sounds very plausible.

Sounds like a large dog, itself larger than 20". You may want a wider wheelbase. At 10mph turning forces (centripetal) may not topple the trailer but...
Forum: Utility Cycling
08-09-08, 07:21 AM
Replies: 91
Views: 129,876
Posted By astronomerroyal

Thanks for the paint info. Sounds definitive,...

Thanks for the paint info. Sounds definitive, and somewhat more complicated than I had envisaged. I'll ask at my local hardware store.
Forum: Utility Cycling
08-08-08, 07:49 AM
Replies: 21
Views: 1,271
Posted By astronomerroyal

For such valuable cargo I would consider...

For such valuable cargo I would consider something along the lines of the Bob Ibex, i.e with suspension. Adding suspension makes it very complicated very quickly, but the Ibex's simple design is...
Forum: Utility Cycling
08-04-08, 01:52 PM
Replies: 91
Views: 129,876
Posted By astronomerroyal

Trailer #3 - with suspension.

In case anyone else tries to make a trailer with suspension. In this case it's for ferrying photographic equipment - and the inevitable groceries. My #1 trailer has proved to be slightly too small...
Forum: Utility Cycling
07-25-08, 04:09 PM
Replies: 91
Views: 129,876
Posted By astronomerroyal

Other than the Bob Ibex does anyone know of other...

Other than the Bob Ibex does anyone know of other trailers with suspension (homebuilt efforts included)? I'm currently building one - almost finished - but am not entirely happy with the design and...
Forum: Utility Cycling
06-11-08, 10:26 AM
Replies: 715
Views: 399,575
Posted By astronomerroyal

Do you have perchance a website/forum with more...

Do you have perchance a website/forum with more detailed descriptions of your work?
Forum: Utility Cycling
06-07-08, 10:17 AM
Replies: 715
Views: 399,575
Posted By astronomerroyal

You have enough room on the tongue for another 6...

You have enough room on the tongue for another 6 panniers. A very elegant line. Does the axle run from one wheel all the way to the other? I occasionally see those wheels on trailers and wonder if...
Forum: Utility Cycling
06-06-08, 11:53 AM
Replies: 91
Views: 129,876
Posted By astronomerroyal

Thanks for the reply. I recently saw this...

Thanks for the reply. I recently saw this trailer;

http://www.cargobicycletrailer.com/

and thought that it was a good way of lowering the centre of gravity, and adding bungees instead of...
Forum: Utility Cycling
05-30-08, 02:09 PM
Replies: 91
Views: 129,876
Posted By astronomerroyal

Actually Go-cart shocks would be very good. The...

Actually Go-cart shocks would be very good. The ones I had seen online were a little long, but there might be more suitable ones out there.

As for forks, that crossed my mind, but yes, too bulky....
Forum: Utility Cycling
05-30-08, 09:46 AM
Replies: 91
Views: 129,876
Posted By astronomerroyal

I have a rather specific question. I'm building...

I have a rather specific question. I'm building another trailer, but this one will have suspension for each wheel. I've been looking for a suitable (cheap) shock absorber for the purpose. ...
Forum: Utility Cycling
05-30-08, 09:14 AM
Replies: 715
Views: 399,575
Posted By astronomerroyal

The above pictures 1. The dynamo mounted on...

The above pictures
1. The dynamo mounted on chassis. Dynamo height and 12inch wheel fit together nicely.
2. The headlight. 1W LED +built-in current regulator, housed in a film canister on a...
Forum: Utility Cycling
05-30-08, 08:58 AM
Replies: 715
Views: 399,575
Posted By astronomerroyal

In response to a Q I'm posting some general...

In response to a Q I'm posting some general pictures of the lighting/dynamo setup on my trailer.
Forum: Touring
05-23-08, 09:20 PM
Replies: 14
Views: 15,876
Posted By astronomerroyal

I was just curious to know the lbs/inch rating is...

I was just curious to know the lbs/inch rating is for the shock (perhaps it's printed on the shock itself)- just in the process of building/designing a trailer with suspension.

Many thanks in...
Forum: Touring
04-25-08, 07:04 AM
Replies: 19
Views: 1,808
Posted By astronomerroyal

I just wanted to say that I had a similar issue...

I just wanted to say that I had a similar issue at first. I laced up the skirts and the saddle has been excellent. I understand Brooks actually offer(ed) a laced version.

e.g....
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