Optimum Runup Settings Bonanza

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GaryRR
Airman First Class
Posts: 87
Joined: 26 Dec 2020
Location: KSEG. Pennsylvania

Optimum Runup Settings Bonanza

Post GaryRR »

Can anyone who has little incidence of plug fouling in the Bonanza please post their throttle, prop, and mix settings during Runup?
Thanks

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Jacques
Senior Master Sergeant
Posts: 2255
Joined: 26 Jun 2011
Location: West Coast, USA

Re: Optimum Runup Settings Bonanza

Post Jacques »

Hey Gary, its been a while since I’ve flown the Bonanza, so you can choose to try, or discard my settings. After start the prop is full forward and mixture full rich (unless airport elevation requires leaning).

Throttle is set to produce 1000-1200 rpm until engine oil is 75 F or 24 C. I do lean the mixture after I set the throttle for RPM, for a slight drop in RPM and the rich until its in the range again.

Once the oil is warm, throttle up to 1700 RPM and exercise prop for a 300-400 RPM drop, then check magnetos at the same RPM for a 50 RPM drop, or near enough.

I’m certain I found these settings from a V35B manual I found online.

Anyway, hope this helps.

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Nick - A2A
A2A Captain
Posts: 11800
Joined: 06 Jun 2014
Location: UK

Re: Optimum Runup Settings Bonanza

Post Nick - A2A »

Hello Gary,

One thing to point out just in case you're not aware, is that the simplest way to avoid plug fouling in the simulation is to install the fine wire spark plugs in the maintenance hangar.

Thanks,
Nick
A2A Simulations Inc.

GaryRR
Airman First Class
Posts: 87
Joined: 26 Dec 2020
Location: KSEG. Pennsylvania

Re: Optimum Runup Settings Bonanza

Post GaryRR »

I will check the plug option out. I thought I did at first. But I just got that general update.
Thanks.

Tomas Linnet
Senior Master Sergeant
Posts: 2007
Joined: 05 Nov 2013
Location: Oksboel, Denmark

Re: Optimum Runup Settings Bonanza

Post Tomas Linnet »

In FSX I run much leaner on the ground than in both the C172 and the C182. I don’t use the fine wire spark plugs.
I always lean on the ground, no matter what elevation I’m at.
Kind Regards
Tomas

Accu-Sim aircraft in my hangar:
C172, C182, P51 Civ, P51 Mil, B17, Spitfire, P47, B377 COTS,
J3 Cub, T6, Connie, P-40, V35B
A2A Accu-Sim Avro Lancaster Loading:............0.000001% complete, please wait.

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Oracle427
Chief Master Sergeant
Posts: 3844
Joined: 02 Sep 2013

Re: Optimum Runup Settings Bonanza

Post Oracle427 »

While on the ground after start and prior to run-up run as lean as possible with the engine running smoothly. If it starts to stumble enrichen until it smooths out.The leaner the better as there is no risk at all of harming the engine at idle power.
Jacques' technique sounds just fine.
Flight Simmer since 1983. PP ASEL IR Tailwheel

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MkIV Hvd
Technical Sergeant
Posts: 697
Joined: 11 Mar 2019
Location: CYYC

Re: Optimum Runup Settings Bonanza

Post MkIV Hvd »

I use fine wire plugs and never lean on the ground unless taking off at 4000' PA or higher, runup at 1700 rpm and lean after takeoff. I have never fouled a spark plug.

Cheers,
Rob
Rob Wilkinson
A2A Harvard, Mustangs Civilian & Military, Spitfire, P-40, Comanche, Bonanza, Cub, VATSIM P4 and some other stuff...

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DHenriquesA2A
A2A Chief Pilot
Posts: 5170
Joined: 27 Mar 2009
Location: East Coast United States

Re: Optimum Runup Settings Bonanza

Post DHenriquesA2A »

Generally speaking after start, 40deg c is fine for a target to taxi. I would lean back until you get a bit of roughness then advance just enough to smooth out the engine. I would also add an item to your runup checklist to make sure the mixture is set to either full rich or whatever setting is needed to compensate for density altitude before you line up.
Dudley Henriques

GaryRR
Airman First Class
Posts: 87
Joined: 26 Dec 2020
Location: KSEG. Pennsylvania

Re: Optimum Runup Settings Bonanza

Post GaryRR »

I checked the hanger screen for my Bonanza and I saw no plug option. Are the fine plugs standard on the larger engine which I have installed?

Tomas Linnet
Senior Master Sergeant
Posts: 2007
Joined: 05 Nov 2013
Location: Oksboel, Denmark

Re: Optimum Runup Settings Bonanza

Post Tomas Linnet »

You’ll need to click on the engine before you can choose your plugs
Kind Regards
Tomas

Accu-Sim aircraft in my hangar:
C172, C182, P51 Civ, P51 Mil, B17, Spitfire, P47, B377 COTS,
J3 Cub, T6, Connie, P-40, V35B
A2A Accu-Sim Avro Lancaster Loading:............0.000001% complete, please wait.

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