All Out Top Speed

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8452
Posts: 45
Joined: Sat Apr 27, 2019 12:22 am
Name: Larry B
Location: NE Texas
Aircraft Type: 1948 Cessna 140
Occupation-Interests: Retired Automation Engineer, Nothing to do and all day to do it.
Contact:
Contact 8452

All Out Top Speed

Post by 8452 »

What do you guys see for throttle to the wall, trimmed level and settled in top speed?

My ragwing, overweight Piggy with fresh O200A and climb prop, gave me 122MPH indicated one way and 119 the opposite direction. Not scientific at all, but I have the cylinders on the fresh engine broken in and I had to see what she’d do. I have nothing to compare to except it seems faster than with the old tired engine.
Larry Bible

Returned to the club after three years away due to life’s changes
1948 Cessna 140, O200A, Ragwing, Custom IFR Panel
1966 Mooney M20F/J
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8452
Posts: 45
Joined: Sat Apr 27, 2019 12:22 am
Name: Larry B
Location: NE Texas
Aircraft Type: 1948 Cessna 140
Occupation-Interests: Retired Automation Engineer, Nothing to do and all day to do it.
Contact:
Contact 8452

Re: All Out Top Speed

Post by 8452 »

No replies? Come on guys, tell me how fast your star ship will go! You guys sure wouldn’t make it on a Mooney forum. :D
Larry Bible

Returned to the club after three years away due to life’s changes
1948 Cessna 140, O200A, Ragwing, Custom IFR Panel
1966 Mooney M20F/J
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6339
Posts: 27
Joined: Tue May 01, 2018 7:00 am
Name: Steve Rose
Location: New Port Richey,FL FA40
Aircraft Type: '48 140
Occupation-Interests: Retired Navy Maintainer
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Re: All Out Top Speed

Post by 6339 »

1948 C90/7150 McCauley: 105MPH @ 2350 in hot muggy Florida.....What's a MOONEY?? :mrgreen:
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6643
Posts: 2443
Joined: Tue May 01, 2018 7:00 am
Name: John C
Location: KLCI, NH
Aircraft Type: 1946 C140/C90
Occupation-Interests: A&P, semi-retired
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Re: All Out Top Speed

Post by 6643 »

8452 wrote: ↑Mon Jul 01, 2019 11:02 amYou guys sure wouldn’t make it on a Mooney forum. :D
I doubt very many of us bought our Cessnas for top speed bragging rights...
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8452
Posts: 45
Joined: Sat Apr 27, 2019 12:22 am
Name: Larry B
Location: NE Texas
Aircraft Type: 1948 Cessna 140
Occupation-Interests: Retired Automation Engineer, Nothing to do and all day to do it.
Contact:
Contact 8452

Re: All Out Top Speed

Post by 8452 »

I’m sure not, but I’m trying to find out what speed to expect'. Mine certainly won’t be the fastest with too much weight, ragwings and a climb prop.

Thanks for the replies. Please keep them coming.
Larry Bible

Returned to the club after three years away due to life’s changes
1948 Cessna 140, O200A, Ragwing, Custom IFR Panel
1966 Mooney M20F/J
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8452
Posts: 45
Joined: Sat Apr 27, 2019 12:22 am
Name: Larry B
Location: NE Texas
Aircraft Type: 1948 Cessna 140
Occupation-Interests: Retired Automation Engineer, Nothing to do and all day to do it.
Contact:
Contact 8452

Re: All Out Top Speed

Post by 8452 »

6339 wrote: ↑Mon Jul 01, 2019 11:19 am 1948 C90/7150 McCauley: 105MPH @ 2350 in hot muggy Florida.....What's a MOONEY?? :mrgreen:
That sounds like really good speed for the plane and conditions.
Larry Bible

Returned to the club after three years away due to life’s changes
1948 Cessna 140, O200A, Ragwing, Custom IFR Panel
1966 Mooney M20F/J
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5115
Posts: 97
Joined: Tue May 01, 2018 7:00 am
Name: Martin Tanguay
Location: Montreal, Quebec, Canada
Aircraft Type: C140
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Re: All Out Top Speed

Post by 5115 »

1946 O200/McCauley 1A101 69-48, ragwings 107mph@2500
Martin Tanguay
Intl Cessna 120-140 Association - Canadian rep
C140, C-FJAR, 1946, sn:9168, O-200, ragwings
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6643
Posts: 2443
Joined: Tue May 01, 2018 7:00 am
Name: John C
Location: KLCI, NH
Aircraft Type: 1946 C140/C90
Occupation-Interests: A&P, semi-retired
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Re: All Out Top Speed

Post by 6643 »

I don't recall ever trying to see what I got at full throttle: too many dollars per hour that way, but I could cruise at 120 indicated at about 2375RPM with a C90 and a 70x52 prop. (A 1A90-CF7152 with half an inch cut off each tip.)

I'm thinking it was pretty close as I was flying with a Socata Rally at the time.
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8452
Posts: 45
Joined: Sat Apr 27, 2019 12:22 am
Name: Larry B
Location: NE Texas
Aircraft Type: 1948 Cessna 140
Occupation-Interests: Retired Automation Engineer, Nothing to do and all day to do it.
Contact:
Contact 8452

Re: All Out Top Speed

Post by 8452 »

Good feedback! I am in Galveston for the holiday, but when I get back I will see what speed I get at 2500.

BTW I didn’t say in my original post, but my prop is a 46 pitch.
Larry Bible

Returned to the club after three years away due to life’s changes
1948 Cessna 140, O200A, Ragwing, Custom IFR Panel
1966 Mooney M20F/J
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User avatar
5115
Posts: 97
Joined: Tue May 01, 2018 7:00 am
Name: Martin Tanguay
Location: Montreal, Quebec, Canada
Aircraft Type: C140
Occupation-Interests:
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Contact 5115

Re: All Out Top Speed

Post by 5115 »

5115 wrote: ↑Mon Jul 01, 2019 1:35 pm 1946 O200/McCauley 1A101 69-48, ragwings 107mph@2500
Next time I'll check what top speed I get at level flight at full throttle and post it back.

What I do know is that when I got the plane, the prop was at 69-54. 2450 rpm I would always be at the edge of the green and yellow arc. Not pleasant at. At top OH with 4 new cylinders, with information from Randy, I opted for climb pitch and got it to 48. An amazing difference. But all that is another subject and was discussed in another thread. Sorry for hijacking.
Martin Tanguay
Intl Cessna 120-140 Association - Canadian rep
C140, C-FJAR, 1946, sn:9168, O-200, ragwings
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