[Solved] Brazilian Stinson HW-75

I don't see the rudder trim adjustment screws? Does this rudder have them?

@ecos36gmail-com Yes it does. The screws are so small and painted at same rudder color what make them difficult to see. This rudder trim solution is an example of the very creative and advanced engineering solutions that Stinson had at the 30´s......cool!

Michael, I'm looking for a set of engine air inlet grills for the model HW-75 or even model 10. Do you know any source where I could find and purchase a set of grills? These are really very hard to find.

Your plane is already too pretty. If I find a set of grills, I'll use them. I tried to match the Stinson cowl opening just in case I found a set of grills.

Posted by: @paulommansuryahoo-com-br

 With all accessories installed got 1120 lbs as empty weight. Will have more details on the performance during next flights and will post here.

 This plane has an empty weight of 1125lbs, very close to your plane. I'm not sure how fast it goes yet. Once I get the wing adjusted, I can install the last of the strut fairings, bring along a GPS and see how fast it does go. I hope it will do 105!

Posted by: @ecos36gmail-com

Posted by: @paulommansuryahoo-com-br

 With all accessories installed got 1120 lbs as empty weight. Will have more details on the performance during next flights and will post here.

  

 My plane did not do 105 mph. Today at 3500' and a 2200 cruise rpm it did 99 mph. The prop will not let it rev up to the 2800 max rpm, maybe just 2500 rpm, so probably a little faster than 99 mph at full power. It does look like I can flight plan for 100 mph though ? 

@ecos36gmail-com

Hi Michael,

Good to know that your baby Stinson in back in the air! Congratulations for the hard and beautiful job!! I didn't see pictures from your first flight.....would love to see....

Yes, our speeds and weights are very close. I think my speeds are a little slower, at 2400 rpm I have 95mph. I'm using the Cont. O-200 with a 69x48" McCauley propeller. What propeller you're using? 

How was your wings rigging? On mine I turned in a few tuns and "shorted" the left rear strut eye bolt. Also, in a second step I unscrewed a little the left rudder trim bolt. The airplane flies greatly straight! 

The 105 is a very balanced airplane with high level of fine engineering efforts used on it. The flight control loads are very proportional and appropriated to make the aircraft safe.

In the stall at full power the baby Stinson is a proven spin proof plane.....The slots really work!

A great airplane!!

Tell us more about your first flights.

Regards!

Beautiful airplane!   The landscape you were flying over looks like it could just as well be in the Midwest United states.  Field patterns, fence rows and roads.  That part of Brazill looks about the same from the air as Brazill, Indiana, which is near my summer home at Terre Haute, Indiana

I have flown or ridden in many Stinson models and they seem to all fly nearly the same with about the same airspeeds and stability even in mildly turbulent air.  I have ridden in a 1929 Stinson Jr, a 1930's high wing tri-motor, A V77 and a 1939 HW-75 with a Continental 85, and of course I have flown each of the 108 series.  It is my contention that the 105 series was designed to cruise at 105 mph and the 108s at 108 mph.  My '46 108 that I have had and been flying for 53 years even has the same type control wheels as your 105 and it has cruised at 108 mph even after I removed the 150 Franklin and converted to a O-360 180 hp Lycoming.

Larry Wheelock

 Well my plane does do 105, probably a little more than that. I went to full power today, straight and kind of level at 4'000' with almost 40 gal of fuel and a GPS. I really can't imagine a 75hp engine doing 105, but maybe it could 150 lbs lighter with wheel fairings at sea level.

Today’s sunset in Brazil.

Beautiful!