Inddedie , young Bob hunt started the FSR trend , FSR .40 , with a 11 x 6 EW THREE BLADE to ' tame ' it .
A coustom prop. dunno about the pitch. The " E.W. " ( extra wide ) series of props appeared as if say two
inches over cut and reshaped.
Yatsenko props have ' a bit ' of blade area . too .
Hawker ' Sea fury ' used 5-blade prop to get enough BLADE AREA to absorb HORSE POWER on take-off, without
the torque reaction of the massive 4-blade, of a manadgeable degree , at least .NOTE ; it is the " Blade Area "
used to absorb "the Power ", of course their pitch is variable, set FINE for Takeoff at Max. H.P. / r.p.m.s to
drag several tonne of 'stores' of deck , without the aeroplane rolling around the propellor , ON acceleration .
Though with the Catapult its thrown clear and past the ' critical effect ' area; where the tourque reaction from
ACCELERATION would be unmanadgeable AT full Throttle . Ordinarlly on an airfield the throttle is PROGRESSIVELY
increased , and not 'at the stop' untill the aircraft is airbourne and ' clean ' (gear and flaps up).
Lancasters ( multi engine ) throttles were advanced assymetrically to hold aircraft straight .
This ' digression ' illustrates that theres one or two forces at work , relateing to model A/C .
11 x 6 E.W.s sorta work on a G-51 , TWO 11 x 5 Zingers get about the blade area of a yatsenko ,12 x 5 ?? .
Some were trying 13 in on the .40s , the Dia of a ST 60 prop , with a bit less pitch .Wide props not Tooth pick's.
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Other ' boogie ' was speed up with engine heat. Often a few ducts / tubes were fitted directed at Crankcase.
Was stated Revs would increase as temp came up on ground, A few laps after release the cooling had taken effect and rpm's dropped to that set.
Someone stated recently FP runaway is Temp related, maybe a peculiarity of Schneurles ?
Note; info garnered armchair potatoe mode, generally. I have a FSRS .40 , Feed Pipe Bore Dia was ' an issue ' with this. (was caught out with undersize thick wall 1/8 pipe,
leaning out @ 1/2 cirle hight.) Otherwise good steady speed run even in semi gale conditions, 12 x 5 min. prop was minimum to stop revs ' bounceing and holding ' .
Have the 13 x 5 Zinger I used with back of tips rounded , (full L.E. length ) .
Or in short, as Randy says ; put a bit of propellor on it , please .