Backcountry Pilot • Stock C170 PIREP performance in the Idaho Backcountry

Stock C170 PIREP performance in the Idaho Backcountry

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Stock C170 PIREP performance in the Idaho Backcountry

What an amazing summer it has been for me. Just got back from my third Idaho trip. Had a wonderful time camping at Johnson Creek with several friends. Weather was awesome. No smoke. Some scattered T storms to make it interesting and not too hot.

I flew my 180 one of the days I was there but the other two days I flew with my friend Sonia in her C170 with a stock O-300D engine. She put the Mac 8042 prop on it a few months ago which made an improvement in the climb performance. I have to say - I was impressed. We landed at Wilson Bar and Cold Meadows on Friday and did Indian/Thomas and Mahoney Creek Sunday. Now the C170 is not going to win any speed contests but it climbed reasonably well for having 2 adults, some flight bags and near full fuel. Camping gear was at 3U2. I am sure it would perform better solo. Now it was not particular hot this weekend in Idaho. Highs in the mid to upper 70s but the lows were only in the low 50s but still not super cold either. Really got me thinking what a great airplane the C170 is for just an all around fun airplane. I will be headed back to Idaho the following weekend for the Skywagon fly-in. Don't get me wrong either - I still love my Skywagon and can't think of a better plane for Idaho but if anyone is on a budget and wants to fly tailwheel airplanes the stock C170 with the right prop gets the job done. It really can do most of the strips in Idaho. The IO360 mod would be cool but is super expensive and if the mission is just 2 full size adults and camping gear why not just go stock C170 and feel the love. I am stoked for Sonia. She has a beautiful airplane that is really not that expensive to own. We flew back to Portland. I flew direct and made it back in 2:14 in the 180 going about 20 nm further. She stopped in Baker City and it took her about 1.6 hours longer. I used 29 gallons. She said she burned 20.

Here is a video of one of the videos and some photos of the weekend.





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Re: Stock C170 PIREP performance in the Idaho Backcountry

Looks like the conditions were perfect, awesome trip, cant wait to take my 170 to Idaho, is late September still a good time weather wise?
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Re: Stock C170 PIREP performance in the Idaho Backcountry

Larry,

Hopefully you'll have good weather in late September. Sometimes you can get an early storm that time of year but usually the early Fall in Idaho is pretty nice. Cooler temps too. I am keeping my fingers crossed for the following weekend. To bad you aren't going to be out there that weekend.


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Re: Stock C170 PIREP performance in the Idaho Backcountry

Headed over this weekend and looking forward to the cooler temps and more flying weather.

Quick question. What weekend is the Skywagon fly-in just to be aware of the traffic at JC.

If it's this weekend maybe we will see you over there. Regardless, have a safe trip!

Thanks in advance!
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Re: Stock C170 PIREP performance in the Idaho Backcountry

Great post and video - and just in time to put the Idaho strips on the list of places I definitely want to visit.

I hope to be there in about two weeks and will review info on the RAF Airfield Guide and youtube videos.

Anything else I should check out?
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Re: Stock C170 PIREP performance in the Idaho Backcountry

140eagles wrote:Great post and video - and just in time to put the Idaho strips on the list of places I definitely want to visit.

I hope to be there in about two weeks and will review info on the RAF Airfield Guide and youtube videos.

Anything else I should check out?


You need the Fly Idaho book and you need the Idaho Aviation chart as it has the reference points listed on the chart for making position reports. Position reports are very important in the BC
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Re: Stock C170 PIREP performance in the Idaho Backcountry

Pacer_ar wrote:Quick question. What weekend is the Skywagon fly-in just to be aware of the traffic at JC.


Skywagons are Sept 7th-10th
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Re: Stock C170 PIREP performance in the Idaho Backcountry

Dog is my Copilot wrote:What an amazing summer it has been for me. Just got back from my third Idaho trip. Had a wonderful time camping at Johnson Creek with several friends. Weather was awesome. No smoke. Some scattered T storms to make it interesting and not too hot.

I flew my 180 one of the days I was there but the other two days I flew with my friend Sonia in her C170 with a stock O-300D engine. She put the Mac 8042 prop on it a few months ago which made an improvement in the climb performance. I have to say - I was impressed. We landed at Wilson Bar and Cold Meadows on Friday and did Indian/Thomas and Mahoney Creek Sunday. Now the C170 is not going to win any speed contests but it climbed reasonably well for having 2 adults, some flight bags and near full fuel. Camping gear was at 3U2. I am sure it would perform better solo. Now it was not particular hot this weekend in Idaho. Highs in the mid to upper 70s but the lows were only in the low 50s but still not super cold either. Really got me thinking what a great airplane the C170 is for just an all around fun airplane. I will be headed back to Idaho the following weekend for the Skywagon fly-in. Don't get me wrong either - I still love my Skywagon and can't think of a better plane for Idaho but if anyone is on a budget and wants to fly tailwheel airplanes the stock C170 with the right prop gets the job done. It really can do most of the strips in Idaho. The IO360 mod would be cool but is super expensive and if the mission is just 2 full size adults and camping gear why not just go stock C170 and feel the love. I am stoked for Sonia. She has a beautiful airplane that is really not that expensive to own. We flew back to Portland. I flew direct and made it back in 2:14 in the 180 going about 20 nm further. She stopped in Baker City and it took her about 1.6 hours longer. I used 29 gallons. She said she burned 20.

Here is a video of one of the videos and some photos of the weekend.





Josh


I flew my old 170B around the Idaho Backcountry for a decade. It worked well, but when takeoff and climb performance are factored into the equation, more margin needs to be built in when planning your moves than in a 180.

They really suffer at high density altitudes, and with anything but the lightest loads on board. I would park it by nine in the morning during the summer and keep it light, carrying partial fuel loads, and never more than two people.

I took it into Vines, Dewey Moore, Mile high, Wilson Bar, Lower Loon, Salmon Bar in Hells Canyon, and many others.

It never let me down, but I nearly hit trees on departure from Stehekin when the book numbers looked quite comfortable.

One thing that I can say is that my 170 was one of the nicest handling airplanes that I ever flew.
Last edited by Scolopax on Fri Sep 01, 2023 8:38 am, edited 1 time in total.
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Re: Stock C170 PIREP performance in the Idaho Backcountry

140eagles wrote:Great post and video - and just in time to put the Idaho strips on the list of places I definitely want to visit.

I hope to be there in about two weeks and will review info on the RAF Airfield Guide and youtube videos.

Anything else I should check out?


Do you have any mountain/canyon flying experience? It’s not a great idea to head out in to that country without some previous experience or instruction specific to the area.
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Re: Stock C170 PIREP performance in the Idaho Backcountry

Scolopax wrote:
Dog is my Copilot wrote:What an amazing summer it has been for me. Just got back from my third Idaho trip. Had a wonderful time camping at Johnson Creek with several friends. Weather was awesome. No smoke. Some scattered T storms to make it interesting and not too hot.

I flew my 180 one of the days I was there but the other two days I flew with my friend Sonia in her C170 with a stock O-300D engine. She put the Mac 8042 prop on it a few months ago which made an improvement in the climb performance. I have to say - I was impressed. We landed at Wilson Bar and Cold Meadows on Friday and did Indian/Thomas and Mahoney Creek Sunday. Now the C170 is not going to win any speed contests but it climbed reasonably well for having 2 adults, some flight bags and near full fuel. Camping gear was at 3U2. I am sure it would perform better solo. Now it was not particular hot this weekend in Idaho. Highs in the mid to upper 70s but the lows were only in the low 50s but still not super cold either. Really got me thinking what a great airplane the C170 is for just an all around fun airplane. I will be headed back to Idaho the following weekend for the Skywagon fly-in. Don't get me wrong either - I still love my Skywagon and can't think of a better plane for Idaho but if anyone is on a budget and wants to fly tailwheel airplanes the stock C170 with the right prop gets the job done. It really can do most of the strips in Idaho. The IO360 mod would be cool but is super expensive and if the mission is just 2 full size adults and camping gear why not just go stock C170 and feel the love. I am stoked for Sonia. She has a beautiful airplane that is really not that expensive to own. We flew back to Portland. I flew direct and made it back in 2:14 in the 180 going about 20 nm further. She stopped in Baker City and it took her about 1.6 hours longer. I used 29 gallons. She said she burned 20.

Here is a video of one of the videos and some photos of the weekend.





Josh


I flew my old 170B around the Idaho Backcountry for a decade. It worked well, but when takeoff and climb performance are factored into the equation, greater margin must be built in to planning your moves than in a 180.

They really suffer at high density altitudes, and with anything but the lightest loads on board. I would park it by nine in the morning during the summer and keep it light, carrying partial fuel loads, and never more than two people.

I took my 170 into Vines, Dewey Moore, Mile High, Wilson Bar, Lower Loon, Salmon Bar in Hells Canyon, and many others.

It never let me down, but I nearly hit trees on departure from Stehekin once when the book numbers presented the departure plan as quite comfortable.

One thing that I can say is that the 170 is one of the nicest handling airplanes that I have ever flown. I loved spinning it and it was easy to put it right where I wanted it on every landing.
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Re: Stock C170 PIREP performance in the Idaho Backcountry

I flew Scolopax’s old 170 for 5 years. I went to Montana, Idaho, Washington, Oregon, and BC. Make sure you plan your routes using the lowest passes, follow rivers and have some knowledge of the fields you are going to. Always leave as early as you cans. The only reason I don’t have the plane anymore is because you need to be aware of soggy,wet fields with holes along the edge of the runway. 170’s will flip over on their back.
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Re: Stock C170 PIREP performance in the Idaho Backcountry

Scolopax wrote:
I flew my old 170B around the Idaho Backcountry for a decade. It worked well, but when takeoff and climb performance are factored into the equation, more margin needs to be built in when planning your move than in a 180.

They really suffer at high density altitudes, and with anything but the lightest loads on board. I would park it by nine in the morning during the summer and keep it light, carrying partial fuel loads, and never more than two people.

I took it into Vines, Dewey Moore, Mile, high, Wilson, bar, lower loon, salmon, bar in Hells Canyon, and many others.

It never let me down, but I nearly hit trees on departure from Stehekin when the book numbers looked quite comfortable.

One thing that I can say is that my 170 was one of the nicest handling airplanes that I ever flew.


Scolopax,

That is pretty cool you took the stock C170 into 3/4 Big Creek 4 strips and really tells me how well you know the C170 plus have a lot of skill. I wouldn't consider taking it into those spots. A light Skywagon with an O520 does that mission pretty well. Yes the stock C170 is under powered. It can definitely get into a lot of places it can't get out of for sure. But for most of the Idaho strips it will work. We didn't push it that hard with our strip selection just because she is new to flying in Idaho and I wanted to see how it performed. I suggested she try going into Lower Loon next summer solo with a light load and in the early morning. We were at Wilson bar for about an hour and took off with temps in the mid 60s. Her plane was off in about 600 feet - maybe a slight headwind.

I think having the correct prop makes a big difference too. She had a 75 inch Mac on it previously and it had an anemic climb even at sea level. The Mac 8042 was a big improvement. More careful planning is required in the canyons on departures but with the correct preparation and understanding of the performance - very manageable. I have done some of the harder strips in my 180 like Vines, Marble and Mile Hi. I wouldn't recommend or consider them in a stock C170. Definitely limited by the climb performance. I do feel her plane performed better than expected and am looking forward to flying it with her next summer. It has been fun training her. I just found out this evening she has over 200 hours in it now. She is flying the crap out of it and she is also flying (landing) it beautifully - both wheelies and 3 points. I really was just a passenger this weekend in her plane. Occasionally a consultant for some of the approaches into these strips.

The 180 is powerful and in a lot ways easier to fly than the 170 especially in crosswinds. I have flown her plane in 10-15 knot variable crosswinds and found it doable but challenging. Skywagons are relatively easy to manage in strong crosswinds. I also think you have to be mindful of lift and downdrafts in the 170. Stehekin is often windy and you can sometimes get strong downdrafts departing to the Northwest when windy. I am guessing that is what you experienced nearly hitting the trees. The Skywagon just has so much more power. That's why I love flying mine so much. Both awesome birds with their individual strengths The C170 being a light on the controls, fun to fly, and elegant beauty. The 180/185 being the ultimate workhorse for backcountry flying.


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Re: Stock C170 PIREP performance in the Idaho Backcountry

Scolopax wrote:
140eagles wrote:Great post and video - and just in time to put the Idaho strips on the list of places I definitely want to visit.

I hope to be there in about two weeks and will review info on the RAF Airfield Guide and youtube videos.

Anything else I should check out?


Do you have any mountain/canyon flying experience? It’s not a great idea to head out in to that country without some previous experience or instruction specific to the area.



Scolopax is right in recommending some mountain/canyon flying instruction if you've never flown in those kind of environments. Some simple advice - fly in the early mornings with no winds. Stick to the easier strips at first. Maybe read a few books. Amy Hoover's book on Mountain flying is well written and a good place to start. I will out there Sept 8-10th. If you are around be good to meet. The Skywagon Fly-in is Sept 7-10 at 3U2. Should be a little cooler in early September and make for some great flying. Glad to hear you decided to head further west on the trip. Should be an epic trip for you.


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Re: Stock C170 PIREP performance in the Idaho Backcountry

Dog is my Copilot wrote:
Scolopax wrote:
140eagles wrote:Great post and video - and just in time to put the Idaho strips on the list of places I definitely want to visit.

I hope to be there in about two weeks and will review info on the RAF Airfield Guide and youtube videos.

Anything else I should check out?


Do you have any mountain/canyon flying experience? It’s not a great idea to head out in to that country without some previous experience or instruction specific to the area.



Scolopax is right in recommending some mountain/canyon flying instruction if you've never flown in those kind of environments. Some simple advice - fly in the early mornings with no winds. Stick to the easier strips at first. Maybe read a few books. Amy Hoover's book on Mountain flying is well written and a good place to start. I will out there Sept 8-10th. If you are around be good to meet. The Skywagon Fly-in is Sept 7-10 at 3U2. Should be a little cooler in early September and make for some great flying. Glad to hear you decided to head further west on the trip. Should be an epic trip for you.


Josh


More simple advice:

The two basic premises of mountain flying put forth by Sparky Imeson in his Mountain Flying Bible:

#1 - Always remain in a position where you can turn toward lowering terrain,

#2 - Never fly beyond the point of no return.

Those have stuck with me since first thumbing through the Mountain Flying Bible around the turn of the century. Big trouble can arise when those rules are not observed.

Following drainages and staying properly oriented are important disciplines to exercise when flying through the Idaho Backcountry.
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Re: Stock C170 PIREP performance in the Idaho Backcountry

Dog is my Copilot wrote:..... Maybe read a few books. .....


The "Fly Idaho" book is good, lotsa tips on flying them.
Idaho state Aviation dept also had some promo / flying tips literature that's free for the asking.
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Re: Stock C170 PIREP performance in the Idaho Backcountry

Good points, Scolopax. If we use drainages rather than GPS and are using ridge lift getting up, we are already in position to safely turn back down drainage should the O-300 be struggling. I used the basic low ground effect takeoff with everything, but the Gallup CAP 172 with the O-300 made doing so necessary at high DA in the summer. Unless getting the tail up as soon as possible and getting the mains off well before Vso and staying level in low ground effect as long as possible is default, that free extra energy will not be there on the bit longer strip where we think we are good with a normal takeoff. And getting close to the trees should be default as well. Giving up airspeed to go well over obstructions with down drainage egress beyond is poor energy management. Once over the trees, safety is down drainage and not Vy. Having the centerline between our legs on every airport takeoff and landing as default is the only way we will be comfortable with really narrow runways. Staying out of the wind with early and late operations is fine. But when in significant rivers of air and going down at 2,000 feet per minute, pulling back on the yoke will not help. It can kill us. The O-300 will teach us to fly fast through down air by pushing on the yoke and slowing in up air by pulling back on the yoke. The principals in "Stick and Rudder" have a lot to do with mountain flying as well. Paying attention to what the airplane wants to do is more critical with low powered airplanes, but critical with all. I have had to turn back down drainage when a 182 couldn't find good ridge lift in the heat of day.
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