Ignition Switch
Does anyone have a 701 keyed ignition switch at reasonable cost?See More
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Bob Hartunian
- Fawnskin, CA
- United States
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Bob Hartunian's Discussions
GRT 912 EIS -Wanted
Started Sep 3 0 Replies 0 Likes
I need a working Grand Rapids EIS for a 912 engine; old one stopped working.bobh5@earthlink.netContinue
Ignition Switch
Started this discussion. Last reply by Glen Clarke Sep 11, 2021. 7 Replies 0 Likes
Does anyone have a 701 keyed ignition switch at reasonable cost?Continue
912 Ignition Coil
Started this discussion. Last reply by Bob Hartunian Jun 9, 2021. 2 Replies 0 Likes
I need a 912 dual ignition coil that works.Continue
Wanted-3" Sensitive Altimeter
Started this discussion. Last reply by Timothy Sparks Jun 27, 2021. 6 Replies 0 Likes
If someone has a 3 1/8" dia sensitive altimeter to 10-20K' that works at reasonable price, please contact me.Bob HContinue
Bob Hartunian's Page
Latest Activity
912 Ignition Coil
I need a 912 dual ignition coil that works.See More
Wanted-3" Sensitive Altimeter
If someone has a 3 1/8" dia sensitive altimeter to 10-20K' that works at reasonable price, please contact me.Bob HSee More
"Bob Hartunian Tie wraps are fine in most instances. However ANYTIME you are using them in an area where high heat is the norm, "never" use the standard Nylon tie wraps. Go the extra cost and use Tefzel or Peek tie wraps. These are designed…"
Profile Information
- Aircraft Model
- STOL CH 701
- Project Status
- Less than half
- Building From
- Partial kit
- Engine installed (or plan to install)
- Rotax 912
- Building Experience
- Have already built an airplane
- Flying Experience
- Private Pilot
- Building and Flying Info / Your Profession / Other Background Info
- Retired after 42 yrs working in aircraft companies specializing in composite structure manufacturing.
Degrees in mechanical/materials engineering.
Built and fly a Pulsar XP with 900 hrs on plane out of high altitude airport, L35.
Fabricating 701 for desert and mountain flying into rough strips for fishing trips.
- Home Airport (ie. KMYJ)
- L35
Bob Hartunian's Blog
Poor performance at higher Altitudes
Posted on April 12, 2021 at 9:52am 10 Comments 0 Likes
I fly my 701 out of a 7000' airport, L35, and have a 912 engine with high comp pistons installed to produce about 90 hp at sea level. Plane has the fixed slats installed. The plane's performance is so marginal that I can not take a passenger because the plane will not climb over 50 mph with nose abnormally high just to stay level in the air. However at lower altitude airports of 3000', performance is better and there is better flying margin and I can climb at 400 fpm solo.
The plane…
ContinueComment Wall (3 comments)
- At 11:56pm on December 9, 2021,
Coenie said…
Thank you for the info.
- At 3:58pm on February 16, 2020,
Thomas Hudgins said…
Bob Hartunian Tie wraps are fine in most instances. However ANYTIME you are using them in an area where high heat is the norm, "never" use the standard Nylon tie wraps. Go the extra cost and use Tefzel or Peek tie wraps. These are designed for use in High Temp and are chemically resistant compounds that will take the beating that Nylon will give up the ghost on in an instant.
https://www.nelcoproducts.com/cable-ties-materials-specifications/
- At 8:29am on July 9, 2016,
Lee DeLano said…
Followed plans without much thought about separate fuel filters.
I usually do my own fueling from 5 gal. cans and airplane is stored in a hangar year round. Normally have replaced the single filter annually during normal maintenance. The clear plastic filters allow pre-flight inspection. The quick drains have caused more problems - a small piece of grit/dirt will interfere with the spring loaded seal and have a tendency to leak.
I did install a shut-off valve on the tank discharge line so each tank could be isolated. It is safety wired in the "OPEN" position and operated annually.
Additionally, I installed an electric fuel pump and spliced in a fuel pressure gauge line at the top of the engine (Rotax 912ULS) and routed line to gauge in panel. Along with that, I added a vent line from the existing fuel split at the top of the engine and ran a nylon line back to the fuel tank - used PVC drip irrigation fittings to make 90 degree bends - the line is on the pilot side and the air bubbles can be seen going back to the tank.
Have been operating since 2010, approx. 200 hours, the system has been running successfully. Annual maintenance and inspection are important for this system.
My grandkids live near Sparks, NV and the highest airport I have operated from is Spanish Springs (N86). I used to commute from Modesto to El Centro and would regularly fly-by Big Bear, but never landed there. You will enjoy the airplane - I love mine. I do go to Gravelly (1Q5) once or twice a year, a truly gravelly runway - experienced rock nicks and erosion in the composite prop - updated the prop with metal tips from Warp Drive - would recommend if you are headed to unimproved strips. Thanks for the comments. Usually attend fly-in at Cloverdale in the spring, maybe I'll see you there.
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