Search found 497 matches

by Jack Gifford
Wed Aug 07, 2019 3:58 am
Forum: Off topic
Topic: Crankshaft experiment
Replies: 162
Views: 27165
Flag: United States of America

Re: Crankshaft experiment

Another test-run with no breakage, this time on a quarter-mile track. Didn't learn much, due to a bad choice of gearing- too "tall" to get the engine into its intended rev range.
by Jack Gifford
Sun Jul 28, 2019 6:37 am
Forum: Off topic
Topic: Star
Replies: 210
Views: 25041
Flag: United States of America

Re: Star

What style oil ring is it? It doesn't look like any style that I'm familiar with.
by Jack Gifford
Fri Jul 26, 2019 6:46 am
Forum: This Forum
Topic: Hello???
Replies: 18
Views: 3674
Flag: United States of America

Re: Hello???

I think we set a new record- 3 full days with no new posts... :(
by Jack Gifford
Tue Jul 16, 2019 6:01 am
Forum: This Forum
Topic: Hello???
Replies: 18
Views: 3674
Flag: United States of America

Re: Hello???

Once more... no new posts in the last 24 hours. Must be great riding weather, eh? :smile: Actually, the weather here would make for good riding- I'm just too busy with the lakester right now. Shooting for doing some testing on the quarter-mile dragstrip at Norwalk Ohio- first August weekend is the A...
by Jack Gifford
Wed Jul 03, 2019 7:32 am
Forum: Off topic
Topic: Crankshaft experiment
Replies: 162
Views: 27165
Flag: United States of America

Re: Crankshaft experiment

Well, yes, it's intended to look like part of an airplane. The body is a fiberglas replica of a P-38 drop tank. Starting in 1947 hot rodders used surplus aluminum drop tanks for the original landspeed racing "lakesters".
by Jack Gifford
Mon Jul 01, 2019 4:52 am
Forum: Off topic
Topic: Crankshaft experiment
Replies: 162
Views: 27165
Flag: United States of America

Re: Crankshaft experiment

Inaugural outing went amazingly well. No problems, no liquids on trailer deck afterward. The only disappointment was my failure to observe ANY of the gauges, not even the tach, during those quick few seconds. Unfortunately the track's timing system failed to get an ET or MPH number. It definitely wa...
by Jack Gifford
Sun Jun 30, 2019 4:22 am
Forum: Off topic
Topic: Crankshaft experiment
Replies: 162
Views: 27165
Flag: United States of America

Re: Crankshaft experiment

I don't expect to actually run 120 MPH in a tenth-mile! Loring would be great, but I can't be ready. Many things are out-of-date (tires, harness, etc.) and I don't yet have a HANS device or latest-Snell helmet, nor a -15 firesuit. I know there are also some rules changes in the last decade- arm rest...
by Jack Gifford
Sat Jun 29, 2019 5:14 am
Forum: Off topic
Topic: Crankshaft experiment
Replies: 162
Views: 27165
Flag: United States of America

Re: Crankshaft experiment

Accomplished lakester builders are packaging experts; I'm not. Everything is now jammed into it but the body around the engine will need to grow a good-sized "blister" to cover it all. Nevertheless it's going for a trial run Sunday- a local tenth-mile dragstrip is better than nothing. With 1.5" of g...
by Jack Gifford
Fri May 17, 2019 6:10 am
Forum: Off topic
Topic: Crankshaft experiment
Replies: 162
Views: 27165
Flag: United States of America

Re: Crankshaft experiment

Okay beat- I'll depend on you to tell me what's missing! There's a lot to be done, but I've decided how to approach a few things. The longer engine/drivetrain only leaves room for a 4" ctr-to-ctr driveshaft! I'll take the most expedient solution- I'll forego the rear suspension to obviate the need f...
by Jack Gifford
Thu May 16, 2019 5:18 am
Forum: Off topic
Topic: Crankshaft experiment
Replies: 162
Views: 27165
Flag: United States of America

Re: Crankshaft experiment

After some more test-runningl last month, it's time to start fitting the engine into the lakester. Proceeding with baby-steps... :roll:
by Jack Gifford
Tue May 14, 2019 5:01 am
Forum: Parts & Bikes wanted
Topic: B44 Rearset footrests wanted - any ideas / inspiration?
Replies: 3
Views: 426
Flag: United States of America

Re: B44 Rearset footrests wanted - any ideas / inspiration?

I accomplished a small amount of rearsetting (3"-4"?) on a B50T by doing a little machining on the originals and re-attaching them. I don't remember the details, but it wasn't very difficult. I doubt that I took any pictures, but I'll look.

Only found a couple photos, but no details of the pegs.
by Jack Gifford
Wed May 01, 2019 5:58 am
Forum: Off topic
Topic: Star
Replies: 210
Views: 25041
Flag: United States of America

Re: Star

Thanks for posting tbe link to the Hazel Raines story- quite interesting.
by Jack Gifford
Mon Apr 29, 2019 5:11 am
Forum: Tech
Topic: Kick-start aid
Replies: 8
Views: 1065
Flag: United States of America

Kick-start aid

Interesting article in May/Jun edition of Motorcycle Classics about installation of the new KickMagic pneumatic starting assist (made by Classic Bike Experience in Essex VT). If it had been available four years ago I would probably not have parted with the B50T. Anybody here tried the KickMagic?
by Jack Gifford
Mon Apr 29, 2019 4:47 am
Forum: Off topic
Topic: Star
Replies: 210
Views: 25041
Flag: United States of America

Re: Star

... aren't the leading link forks naturally anti-dive?... Only if the brake reaction torque is to the leading link. Side note: old, imprecise, sticky telescopics were also somewhat anti-dive; too bad they didn't have any compliance... I agree that [ideally] beat's torque link should be centered on ...
by Jack Gifford
Sun Apr 28, 2019 6:48 am
Forum: Off topic
Topic: Star
Replies: 210
Views: 25041
Flag: United States of America

Re: Star

Minety must have cheated... :cry:
by Jack Gifford
Fri Apr 26, 2019 6:17 am
Forum: Off topic
Topic: Star
Replies: 210
Views: 25041
Flag: United States of America

Re: Star

337 lb. dry (153.2 kg)
by Jack Gifford
Thu Apr 25, 2019 5:54 am
Forum: Off topic
Topic: Star
Replies: 210
Views: 25041
Flag: United States of America

Re: Star

:ban :ban :ban
by Jack Gifford
Tue Apr 23, 2019 5:55 am
Forum: Off topic
Topic: Star
Replies: 210
Views: 25041
Flag: United States of America

Re: Star

Thanks for the picture. Clever way to obtain anti-dive adjustment!
by Jack Gifford
Sun Apr 21, 2019 6:36 am
Forum: Off topic
Topic: Star
Replies: 210
Views: 25041
Flag: United States of America

Re: Star

Nice work beat!
Any picture of the adjustable-anti-dive scheme?
by Jack Gifford
Thu Apr 18, 2019 6:23 am
Forum: Off topic
Topic: Star
Replies: 210
Views: 25041
Flag: United States of America

Re: Star

Serious question for beat- I'm surprised at the lack of any protection of the transistor's E/C junction from the inductive voltage spike as primary coil current is interrupted. I'm guessing your coil will be low-turns-ratio (thus somewhat-low-inductance primary), but what magnitude will the voltage ...
by Jack Gifford
Wed Apr 17, 2019 6:20 am
Forum: Off topic
Topic: Star
Replies: 210
Views: 25041
Flag: United States of America

Re: Star

minetymenace wrote:
Tue Apr 16, 2019 7:20 am
... Despite granting you guys independence...
Oh?
by Jack Gifford
Wed Apr 17, 2019 6:17 am
Forum: Off topic
Topic: Star
Replies: 210
Views: 25041
Flag: United States of America

Re: Star

Thanks for the details.
by Jack Gifford
Tue Apr 16, 2019 4:55 am
Forum: Off topic
Topic: Star
Replies: 210
Views: 25041
Flag: United States of America

Re: Star

C,B,E == Collector, Base, Emitter (transistor leads) beat- don't you want a resistor (>= 1k ohm) to reduce base current? It looks like you plan to have 12v going through the points and directly to the base of the transistor- which will probably cook the transistor. Or is that space in the box meant ...
by Jack Gifford
Sun Apr 07, 2019 4:27 am
Forum: Tech
Topic: Imperial thread sizes
Replies: 16
Views: 1301
Flag: United States of America

Re: Imperial thread sizes

WM20- Thanks for the BSA history. :thumb
by Jack Gifford
Tue Apr 02, 2019 5:39 am
Forum: News
Topic: Stan has been causing trouble for 75 Years.
Replies: 15
Views: 2627
Flag: United States of America

Re: Stan has been causing trouble for 75 Years.

... Stan is one of the oldest members here at the forum. Just beaten by Commando by 3 hours... I'm not an old timer on this site, and I'm probably viewed as an "outsider", but apparently I've got 3 years on Stan. :shock: [in '59 I commuted to work and college on a '40 H-D] Keep up the good work Sta...
by Jack Gifford
Mon Mar 04, 2019 5:33 am
Forum: Off topic
Topic: Slickshift
Replies: 1
Views: 552
Flag: United States of America

Slickshift

Was reading a 1959 article about the "new" Triumph Slickshift system. Seems to be a good idea- and Bob Greene had good words about it after competing in the Big Bear hare-and-hound event that year. Anybody here have experience with it? I'm surprised I never heard more about it.
by Jack Gifford
Thu Feb 28, 2019 6:24 am
Forum: Off topic
Topic: Star
Replies: 210
Views: 25041
Flag: United States of America

Re: Star

Are 2 wheel drive sidecar rigs raced anywhere?
by Jack Gifford
Tue Feb 19, 2019 6:10 am
Forum: Tech
Topic: Electric Start
Replies: 623
Views: 105568
Flag: United States of America

Re: Electric Start

BasilF wrote:
Mon Feb 18, 2019 8:19 am
... One of these batteries... http://bikeaholics.co.uk/magento/index. ... prod_info2
Thanks for the posting. It looks like lithium ion batteries are finally becoming more affordable.
by Jack Gifford
Sun Feb 17, 2019 7:29 am
Forum: Tech
Topic: Electric Start
Replies: 623
Views: 105568
Flag: United States of America

Re: Electric Start

:grin: :grin: :grin: :grin:
by Jack Gifford
Thu Jan 31, 2019 6:29 am
Forum: Tech
Topic: Electric Start
Replies: 623
Views: 105568
Flag: United States of America

Re: Electric Start

Great progress! :thumb
by Jack Gifford
Mon Jan 07, 2019 6:03 am
Forum: Off topic
Topic: Marooned on a desert island
Replies: 3
Views: 830
Flag: United States of America

Re: Marooned on a desert island

Ya' got me... :oops:
by Jack Gifford
Sun Jan 06, 2019 5:52 am
Forum: Off topic
Topic: Star
Replies: 210
Views: 25041
Flag: United States of America

Re: Star

I agree with Minety on the gussets. Except that they are more effective when attached to the "faces" of the tubes rather than to the "insides" of the tubes (ask any builder of driver cages for race cars).
by Jack Gifford
Thu Jan 03, 2019 6:41 am
Forum: Off topic
Topic: Star
Replies: 210
Views: 25041
Flag: United States of America

Re: Star

beat wrote:
Wed Jan 02, 2019 9:16 pm
... abouth like this ??...
Yes, that's what I was thinking.
What are you thinking for swing arm strength in the horizontal plane?
by Jack Gifford
Tue Jan 01, 2019 6:55 am
Forum: Off topic
Topic: Star
Replies: 210
Views: 25041
Flag: United States of America

Re: Star

Tying the two bends together would fully triangulate the arm (2 triangles with a common side).
by Jack Gifford
Tue Dec 25, 2018 5:27 am
Forum: News
Topic: Merry Christmas
Replies: 8
Views: 1251
Flag: United States of America

Re: Merry Christmas

Merry Christmas to all! :smile:

Already got a nice gift, thanks to a helping hand from my spouse; located and remedied the elusive "klunk" in the front end of my winter-beater car! :grin:
by Jack Gifford
Wed Dec 19, 2018 6:20 am
Forum: Int BSA Rally and other meetings
Topic: New Year's Day Meeting 2019
Replies: 22
Views: 2656
Flag: United States of America

Re: New Year's Day Meeting 2019

This yank would phonetically spell "Gloucestershire" as "Glous-ter-shur". No?

But don't ask me to spell the name you pronounce as "Fan-shaw". :roll: ["Featherstone"?]
by Jack Gifford
Thu Dec 13, 2018 6:59 am
Forum: Off topic
Topic: The science of engine combustion.
Replies: 15
Views: 2096
Flag: United States of America

Re: The science of engine combustion.

Okay, I'll be a sucker and try, although I'm definitely not an "expert"... 1> In terms of speed of fuel mass burning speed, I think that a rich mixture is faster. However, the greater mass of fuel to burn causes the flame front speed to be slower, which explains why a "fat" mixture is "safer" regard...
by Jack Gifford
Sun Dec 02, 2018 6:35 am
Forum: Off topic
Topic: When I grow up.
Replies: 3
Views: 882
Flag: United States of America

Re: When I grow up.

Made me smile! :smile:
by Jack Gifford
Sun Dec 02, 2018 6:32 am
Forum: Off topic
Topic: Star
Replies: 210
Views: 25041
Flag: United States of America

Re: Star

That fork will provide significant anti-dive.
I liked the Earl's fork on my Horex- zero stiction and just the "right" amount of anti-dive.
by Jack Gifford
Wed Nov 07, 2018 6:34 am
Forum: Off topic
Topic: Crankshaft experiment
Replies: 162
Views: 27165
Flag: United States of America

Re: Crankshaft experiment

Engine is going back together now. You could say it was merely a head gasket failure, but it was due to something I missed during the last teardown. I had concentrated on repairing the torched spots in cylinders 2 & 3, and didn't notice that the detonation had "lifted" the middle of the head. Yester...