Crankshaft experiment

Just some fun to show. Links, pics or movies.

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Jack Gifford
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Re: Crankshaft experiment

Post by Jack Gifford » Wed Jul 03, 2019 7:32 am

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".
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Re: Crankshaft experiment

Post by Jack Gifford » Wed Aug 07, 2019 3:58 am

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.
"Motley" bike history: Horex 400, 1940 HD 45 FH, HD Baja 100, '49 Indian Scout 440, Victor 441 Roadster, H*nda TL125, Guzzi V50, H*nda FT500, 400-4, NX250
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Re: Crankshaft experiment

Post by beat » Thu Aug 08, 2019 9:10 pm

well, - at least no breakage.

wich is something of a success.

:grin: :grin:
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Re: Crankshaft experiment

Post by Jack Gifford » Sun Aug 25, 2019 3:39 am

Tomorrow I'll be at the tenth-mile drag event again... This time with gearing that's more appropriate... :oops:
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Re: Crankshaft experiment

Post by beat » Mon Aug 26, 2019 9:08 pm

:ok <209

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Re: Crankshaft experiment

Post by Jack Gifford » Tue Aug 27, 2019 6:06 am

The race car treated me good once more- no issues. :thumb
85.3 MPH at the end of the tenth-of-a-mile was 7,100 RPM, which is getting closer to the engine speed I want to see.
I need to improve some things in the cramped cockpit. For example, the required helmet and HANS device prevent me from tipping my head enough to view the harness buckle- a crew member must reach in and buckle it.
"Motley" bike history: Horex 400, 1940 HD 45 FH, HD Baja 100, '49 Indian Scout 440, Victor 441 Roadster, H*nda TL125, Guzzi V50, H*nda FT500, 400-4, NX250
Aside from bikes: known as the "guru" of M/T hemi Pontiacs

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Re: Crankshaft experiment

Post by Jack Gifford » Mon Sep 30, 2019 2:57 am

Got in two more tenth-mile runs with no damage. Had to abort the first run- about two seconds out the rear tires broke traction and tried to pass me! Gearing was only increased about 12% and I didn't expect wheelspin. On the second run I stayed away from full throttle for a couple of seconds, so I didn't see the 8,000 RPM I wanted- only 7,250. No more running this year, but I'm anxious to get to a landspeed track next season.
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Re: Crankshaft experiment

Post by beat » Thu Oct 03, 2019 2:32 pm

wishes you the best for next season..... :thumb :thumb :thumb

beat

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Re: Crankshaft experiment

Post by Jack Gifford » Fri Oct 04, 2019 5:23 am

Thanks Beat! I'll be watching for some podium finishes with your 3-wheeler.
"Motley" bike history: Horex 400, 1940 HD 45 FH, HD Baja 100, '49 Indian Scout 440, Victor 441 Roadster, H*nda TL125, Guzzi V50, H*nda FT500, 400-4, NX250
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Re: Crankshaft experiment

Post by Jack Gifford » Tue Sep 29, 2020 6:01 am

I finally got the lakester to a landspeed event the first week of September at the former Loring AFB (12,600' x 300' runway). Plans for a crew fell through, but other racers were very helpful. It was a long trip- 1,720 miles towing with the '59 GMC- but neither the truck or race car suffered any damage. The prior mile record in my class was 121 mph, which I bumped to 136 on my first run, then bumped it the next day to 150. Amazing success for a rookie racer!
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Re: Crankshaft experiment

Post by Barry Creary » Tue Sep 29, 2020 7:14 am

Well done Jack congratulations all your great work paying dividends.

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Re: Crankshaft experiment

Post by b50root » Tue Sep 29, 2020 8:27 am

Congrats. Any Video?
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Re: Crankshaft experiment

Post by Jack Gifford » Wed Sep 30, 2020 5:54 am

b50root wrote:
Tue Sep 29, 2020 8:27 am
... Any Video?...
One movie- forgot to start the camera on other runs. But it's just a view of the instruments (poor boy's data-logging!). :roll: And what I really wanted to see was A/F ratio, but that gauge wasn't readable in the movie :( . Before next season I'll re-arrange gauges and improve the camera angle. The only benefit of the movie was seeing bottom-end oil pressure not wavering from 100 psi. :grin:
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Re: Crankshaft experiment

Post by beat » Wed Sep 30, 2020 7:59 pm

hi Jack,

this is great news :!: :!:

pushing a record from 121 mph to 150 is a amazing job :!: :!: :!:

congratulation <208 <208

IMO: at the view of the instruments is maybe some more mph to find...

beat

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Re: Crankshaft experiment

Post by Jack Gifford » Thu Oct 01, 2020 6:30 am

beat wrote:
Wed Sep 30, 2020 7:59 pm
... at the view of the instruments is maybe some more mph to find...
Yes, I hope so. I especially need to see A/F ratio since I'm purposely running "fat" to be on the safe side. The conservative tune has served me well so far- no engine issues at all in 10 runs (including dragstrip tests last summer). Now that my licensing passes are out of the way, I look forward to a more aggressive tune-up next year- A/F ratio, ignition timing, blower speed, etc.- and gearing changes to also run the 1.5 mile.
"Motley" bike history: Horex 400, 1940 HD 45 FH, HD Baja 100, '49 Indian Scout 440, Victor 441 Roadster, H*nda TL125, Guzzi V50, H*nda FT500, 400-4, NX250
Aside from bikes: known as the "guru" of M/T hemi Pontiacs

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