Optimum Runup Settings Bonanza

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GaryRR
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Location: KSEG Selinsgrove, PA

Optimum Runup Settings Bonanza

Post by 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
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Re: Optimum Runup Settings Bonanza

Post by 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
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Re: Optimum Runup Settings Bonanza

Post by 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
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Re: Optimum Runup Settings Bonanza

Post by GaryRR »

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

Tomas Linnet
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Re: Optimum Runup Settings Bonanza

Post by 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

Sim: FSX SE
Accu-Sim aircraft in my hangar:
C172, C182, P51 Civ, P51 Mil, B17, Spitfire, P47, B377 COTS,
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Oracle427
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Re: Optimum Runup Settings Bonanza

Post by 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
N28021 1979 Super Viking 17-30A

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MkIV Hvd
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Re: Optimum Runup Settings Bonanza

Post by 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: Civilian Mustang, T-6, Bonanza, Comanche, Cub, C182, Spitfire, P-40, Cherokee, P-51 - VATSIM P4 and some other stuff...

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DHenriques_
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Re: Optimum Runup Settings Bonanza

Post by DHenriques_ »

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
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Re: Optimum Runup Settings Bonanza

Post by 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
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Re: Optimum Runup Settings Bonanza

Post by Tomas Linnet »

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

Sim: FSX SE
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:............0.000003% complete, please wait.

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