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Re: C of G for O-360 conversions
Posted: Thu Dec 12, 2019 4:13 pm
by daedaluscan
bat443 wrote:I have a 54 170B with a wide deck O-360A1A Avcon conversion and 80 inch Harzell with the balancer. I would call the performance outstanding and this installation because of the balancer has no rpm range restrictions.
1487.2 pounds at 38.27 weighed about 10 years ago by someone other than me. Has 8.00 tires, double puck Clevelands, factory camera hole aft of pilot seat, baggage door, Javelin fuel tank (24 pounds at 99 inches) com and transponder and an much heavier interior than it needs to be. Flies fine. I plan to lighten up the interior and reweigh the plane myself in the spring.
Dave Stoots ant Stoots Aviation in Fairbanks, AK will sell you an STC to install the 80 in prop on a 180 hp 170 and doesn't care what airplane it came off. A friend on mine ran into the same problem with Harzell when he tried to install a 80 inch off a Husky and was told it was not in the "correct" serial number group to be installed on a 170 and he would need to buy a new prop. He called Stoots and they issued him the STC for $500, it made the installation affordable by being able to buy a used prop.
Tim
Thanks, I’ll give him a call
Re: C of G for O-360 conversions
Posted: Sat Dec 21, 2019 9:28 pm
by JohnNielsen
EW: 1405 39.0" 54,745
1955 170B w DelAir O-360 and MT Composite prop (and a LOT of other mods). The MT 'Ultra' 2-blade 80" prop is the lightest at 45 lbs. The MT governor is only 2 lbs. The MT Ultra prop has slightly better performance over the Trailblazer and has the advantage of best vibration dampening and owner repairability. Both composite props are about $15k with spinner and delivery. Flight Resource owns the MT Prop STC and often has some used MT props for less $$.
www.Flight-Resource.com They just merged with McFarlane, so one stop shopping for a whole bunch of parts I used on this project.
John Nielsen
Re: C of G for O-360 conversions
Posted: Sun Dec 22, 2019 12:31 pm
by daedaluscan
JohnNielsen wrote:EW: 1405 39.0" 54,745
1955 170B w DelAir O-360 and MT Composite prop (and a LOT of other mods). The MT 'Ultra' 2-blade 80" prop is the lightest at 45 lbs. The MT governor is only 2 lbs. The MT Ultra prop has slightly better performance over the Trailblazer and has the advantage of best vibration dampening and owner repairability. Both composite props are about $15k with spinner and delivery. Flight Resource owns the MT Prop STC and often has some used MT props for less $$.
http://www.Flight-Resource.com They just merged with McFarlane, so one stop shopping for a whole bunch of parts I used on this project.
John Nielsen
This is really how I would like to go, but not in the budget yet. I think I will go with a legacy CS prop for now. I would really prefer to go fixed pitch but can’t seem to find a legal way to do this in Canada with a hollow crank motor.
Re: C of G for O-360 conversions
Posted: Sun Dec 22, 2019 1:22 pm
by ghostflyer
There is a service letter put out by lycoming for the modification to the crank shalf in changing from fixed pitch to variable pitch or back to fixed pitch from a variable pitch prop . It’s my belief it’s legal in Canada . I haven’t the paper work in front of me but when I return home and remember to look for it I will post the service letter . Just a note . If you are going fit a fixed pitch prop clean the hollow area of the prop shalf internally and paint it to,stop corrosion and then fit the plug into the crane shalf . I think that’s a service letter also . I can’t remember the service letter numbers ,I am getting too old for that these days . Now what was I doing ?
Re: C of G for O-360 conversions
Posted: Sun Dec 22, 2019 8:48 pm
by n2582d
ghostflyer wrote:There is a service letter put out by lycoming for the modification to the crank shalf in changing from fixed pitch to variable pitch or back to fixed pitch from a variable pitch prop. ...
Service Instruction 1435ghostflyer wrote:... If you are going fit a fixed pitch prop clean the hollow area of the prop shalf internally and paint it to,stop corrosion and then fit the plug into the crane shalf. I think that’s a service letter also . ...
AD98-02-08
Service Bulletin 505B
Service Bulletin 530B
Why the exception of various O-360 engines to these Service Bulletins?
Re: C of G for O-360 conversions
Posted: Mon Dec 23, 2019 3:55 am
by ghostflyer
Some O-360 engines have a different steel compounds used in the crankshalfs . Some crankshalfs are “nearly”corrosion resistant .
Re: C of G for O-360 conversions
Posted: Wed Mar 17, 2021 2:59 pm
by daedaluscan
Weighed it today 1440 at 39”
More than I wanted ( of course) but CG is acceptable.
Heavy steam panel and heavy Hartzell prop.
Start up next week
Re: C of G for O-360 conversions
Posted: Wed Mar 17, 2021 5:52 pm
by c170b53
Awesome news Charlie, flew over @ 3500 Sunday your place looked deserted. Did you put doors on your hangar or were they always there, never noticed them before. We need a 170 get together once your machine is up and running. There’s a few recent additions to the lower mainland fleet. Maybe we can equal a Texas get together possibly Courtney airpark ?
Re: C of G for O-360 conversions
Posted: Thu Mar 18, 2021 3:54 pm
by daedaluscan
Yes, doors have been there for a while:)
Great idea for a get together, Courtney might be intimidating to some?
I am planning to have a weekend in the summer to have a 170 meeting, or maybe a tailwheel meeting. Not a formal fly in , but an invitation to come and camp and hang out on Texada.