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Happy cox powered bipe restoration needed after 200 plus flight

Post  davidll1984 on Sun Mar 08, 2020 10:33 am

cox powered bipe restoration needed after 200 plus flight  Image24
cox powered bipe restoration needed after 200 plus flight  Image23
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Happy Re: cox powered bipe restoration needed after 200 plus flight

Post  rsv1cox on Sun Mar 08, 2020 3:19 pm

Well used Tiger Moth David. Right down my alley. Sure would like to get my hands on something like that.

More information??????????
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Happy Re: cox powered bipe restoration needed after 200 plus flight

Post  davidll1984 on Sun Mar 08, 2020 9:55 pm

y have 2 new in box spare for futur wit my boy its a fomy from great plane electrifly 2 ch i converted for a 6ch eltra light spectrum no as3x 3g servo from heli tink?gaz tank is dubro not sur was built in2014 but gaz reserve it run 30 min used to land after 25 wit batry lasting depend on number uf output user to control plane during fly if run circle can go back after 30 min for 1 more run used a .049 rc diesel but nitro crank pin is worn piston pin also but cylinder is ok plenty comprestion tink is cose by it engines configuration upside down no lube left in crank case have lerning next engine is meabe a twin .020 not sur have only 2 tee dee .020 end wil a tee dee on side wil last longer life ?
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Happy engine damages crank

Post  davidll1984 on Mon Mar 09, 2020 8:55 am

cox powered bipe restoration needed after 200 plus flight  Image25
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Happy Re: cox powered bipe restoration needed after 200 plus flight

Post  davidll1984 on Mon Mar 09, 2020 8:57 am

not sur if visible but ckank is da mage bad piston con rod is oblique chape
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Happy Re: cox powered bipe restoration needed after 200 plus flight

Post  rsv1cox on Mon Mar 09, 2020 3:03 pm

davidll1984 wrote:not sur if visible but ckank is da mage bad piston con rod is oblique chape

Sounds like new parts are in order David.
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Happy time to get the tiger out for a flyght

Post  davidll1984 on Wed Apr 29, 2020 10:15 pm

after it sit for to long batry is too weak to last entire tank wil chage if not recovered after charge and discharge multiple time its long proses wigle controler stick for 20 minut it nead 30 minute of flight timer is set to 25 min engine is build of black widow crank no 7 cylinder head glow plug is to try not sur is upside down so a standar plug wil stal on low rpm y use sur start tub wit valve carb tink of use turbo plug?
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Happy Re: cox powered bipe restoration needed after 200 plus flight

Post  balogh on Thu Apr 30, 2020 12:38 am

I wonder if the inverted engine position leads to crankpin and rod end wear..then normal upright position would lead to balljoint wear. (Balljoint gets loose more because of the cap opening up than by wear IMHO).
The castor will not accumulate in the crankcase by gravity in my opinion. The high velocity crank and rod are kicking the fuel air mixture around. Hot surfaces cause the methanol and nitro to partly evaporate and leave higher castor concentration on surfaces but I do not think gravity will have a say in where castor goes in the crankcase. Sorry for theorizing on it...a heavy 6x3 prop, or low castor % in total oil % may wear the crankpin connection sooner than castor starvation, if any, due to inverted position.

Long story short David, I would leave the engine in whatever position that fits the cowling and the scale looks of your Tiger Moth..looking forward to seeing the restoration project unfold!
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Happy tiger back to life

Post  davidll1984 on Thu Apr 30, 2020 10:50 am

cox powered bipe restoration needed after 200 plus flight  Image132
cox powered bipe restoration needed after 200 plus flight  Image131
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Happy hope for long live on engine

Post  davidll1984 on Thu Apr 30, 2020 11:06 am

yes balogh piston conrod wear is hapen du to por fuel draw du to a smal acumulation of sort of plastic residu in tank it was som time restriting fuel draw its wy my con rod an bal soket damaged faster piston it self is fine cylinder to both part crank piston is now from black widow not hd crank like befor hope it wil take it at last 100 fly now y wil never egain let fuel sit mix in tank y also found smal particul sort of plastic in my premix fuel botle not lot of but tink is time has degrade my fuel oil to seperate just like in my plane fuel cel y use clotz benol ? wy it hapen Doh!
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Happy Re: cox powered bipe restoration needed after 200 plus flight

Post  davidll1984 on Thu Apr 30, 2020 11:07 am

cox powered bipe restoration needed after 200 plus flight  Image133
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Happy Re: cox powered bipe restoration needed after 200 plus flight

Post  davidll1984 on Fri Oct 09, 2020 3:37 pm

Fixing piston conecting rod and crankchaft play on m'y very used 049 modified enginescox powered bipe restoration needed after 200 plus flight  Img_2030
Bushing in conecting rod pres fit right fit now Perfect no play redy for piston reset Very Happy
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Happy Re: cox powered bipe restoration needed after 200 plus flight

Post  davidll1984 on Sat Oct 10, 2020 3:23 am

Engines. Asembly Not test cox powered bipe restoration needed after 200 plus flight  16023111
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Happy Re: cox powered bipe restoration needed after 200 plus flight

Post  balogh on Sat Oct 10, 2020 3:52 am

davidll1984 wrote:Fixing piston conecting rod and crankchaft play on m'y very used 049 modified enginescox powered bipe restoration needed after 200 plus flight  Img_2030
Bushing in conecting rod pres fit right fit now Perfect no play redy for piston reset Very Happy

Hey Dave how did you press-fit the conrod large end? Any special tool for that?
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Happy Re: cox powered bipe restoration needed after 200 plus flight

Post  davidll1984 on Sun Oct 11, 2020 7:54 am

Yes use punch right size it fit in tube bushing is insert in tube it wil diform if Not and size of con rod pin on plate To fit inside bushing in conecting rod at the and use difrent punch To lock in place on the conecting rod
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Happy Re: cox powered bipe restoration needed after 200 plus flight

Post  davidll1984 on Sun Oct 11, 2020 10:14 pm

Som of the stuf and tool y use cox powered bipe restoration needed after 200 plus flight  16024711
cox powered bipe restoration needed after 200 plus flight  16024710 use crank To fit inside bushing as y insert part in conecting rod
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Happy Re: cox powered bipe restoration needed after 200 plus flight

Post  balogh on Mon Oct 12, 2020 12:48 am

Thank you Dave for the explanation. Do you have a good photo about the conrod after the bushing has been press fit?

I have a TeeDee51 with many hours of run (~300) on its clock, but the big end of the rod still sits on the crankpin with good fit. The engine as a whole still runs strong with some blow-by in the cylinder already noticeable though, but its extent above 20k rpm should not be impacting the engine power that much.

I think that with normal use it is the piston to cylinder fit that will go loose the soonest  and force the engine to retire. The death of a  well maintained ball socket and the crankpin fit would come later.

Anyway your bushing is a unique solution in a 049 size COX piston. I hope the oversize hole in your conrod big end drilled to accommodate the bushing has not weakened it too much and it will last when the engine runs at its peak..
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Happy Re: cox powered bipe restoration needed after 200 plus flight

Post  davidll1984 on Mon Oct 12, 2020 9:13 am

Y wil fit exaust and run in m'y old ez bee wit fuel tank remote Line on black widow 8cc y want 15 To 20 minute of flight if posible tink is conecting rod wil last and if its con losse wit time y can reset its bushing once or twice tink piston wit be no use befor its rod y want 19k in that range
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