Today's Message Index:
----------------------
1. 12:27 AM - CHT gauge (Yak Driver)
2. 01:19 AM - Re: CHT gauge (Richard Goode)
3. 06:19 AM - Re: Another weight and balance question (stephen.hayne)
4. 07:15 AM - Re: Hot starts (stephen.hayne)
5. 03:14 PM - Re: Hot starts (Ttail)
6. 04:01 PM - Re: Hot starts (LawnDart)
Message 1
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Hi Yakkers,
I just had the copper washer replaced on the end of my cht wires at the annual
inspection. Ran the plane today and the gauge under read and was wavering quite
a bit. Has anyone experienced this problem before or know if the gauge can be
calibrated.
Thanks in advance,
Ant.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=490239#490239
Message 2
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Those CHT gauges working off one sparking plug are inevitably not that
accurate. However making sure that there is a perfect contact between the
"washer" and the cylinder head is important.
Richard
RICHARD GOODE AEROBATICS
Rhodds Farm, Lyonshall, Hereford, HR5 3LW, UK
Tel: +44 (0)1544 340120 Fax: +44 (0)1544 340129
e-mail: richard.goode@russianaeros.com
www.russianaeros.com
WORLD LEADERS IN RUSSIAN SPORTING AIRCRAFT & ENGINES
In partnership with Aerometal Kft, Hungary.
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Yak Driver
Sent: 13 July 2019 08:27
Subject: Yak-List: CHT gauge
Hi Yakkers,
I just had the copper washer replaced on the end of my cht wires at the
annual inspection. Ran the plane today and the gauge under read and was
wavering quite a bit. Has anyone experienced this problem before or know if
the gauge can be calibrated.
Thanks in advance,
Ant.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=490239#490239
Message 3
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| Subject: | Re: Another weight and balance question |
Here mine - just before certification last year and all old radios removed (lightest
possible!).
--------
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Dr. Stephen C. Hayne, Professor, CIS, Colorado State University
666CJA
http://selfsynchronize.com/hayne/plane/cj6.asp
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=490246#490246
Attachments:
http://forums.matronics.com//files/screen_shot_2019_07_13_at_71823_am_516.png
Message 4
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I had my first "hot" start issue with my 'chang. I now have 100+ hours in it,
so not a total newbie, still learning tho, of course.
When "cold" it starts great with the normal priming procedure described by others.
After fueling, it starts beautifully without any priming. At RedStar events,
I've not had trouble starting it on the ramp after training flights on hot
days (Lamar, CO where the ramp is in the 80s). At Young Eagles events, no trouble
starting after 15-20 minutes of ground time (5x flights).
However, a couple days ago, I flew to Pueblo from Fort Collins (150 miles) in the
morning to attend some meetings - a 1 hr flight is MUCH better than 4 hours
on the road each way through Denver! Refueled immediately upon landing at self-serve,
fired up, taxiied to tie-down. No problem. But it wouldn't start a
few hours later... read on, or not, if you're bored by now.
So, after the meetings, the ramp was 100'ish degrees (3:30 in the afternoon), I
used the normal prime (5 shots - even though I just read Jay's 100 degree algorithm).
I have replaced the manual wobble pump with a properly sized faucet
electric pump, and when activating it for pressure, it didn't seem to give me
as much needle movement as I have come to expect, but the sound changed and I
thought that meant I had gotten some pressure.
Just wouldn't fire. 3 attempts used up almost all my air. No spare scuba bottle
(back at the hangar). No adapter hose (back at the hangar). This was my first
flight a fair distance away where I wasn't meeting Yak/Chang pilots. 2 FBOs,
but nothing they could do without my adapter, I'm sure.
Anyway, a fellow 'chang owner, from 50 miles away, flew over with a bottle and
his adapter (what a great community we have!). We recharged, primed 1 shot, 1
blade, for 5 blades, and it fired right up. Flew home without any issues.
Some gurus I called while waiting suggested I check my shower of sparks (buzzed
fine), and of course, my left mag WAS operational (possible failure point), etc.
Bottom line, I am installing the spare scuba bottle, carrying a bag with more tools
and the adapter in it... :)
And, I am going to be very careful about priming and vapor lock (if that is what
it was), after heat-soaked sitting on the ramp, in the future!
--------
-
Stephen Hayne, Professor, CIS, Colorado State University
666CJA
http://selfsynchronize.com/hayne/plane/cj6.asp
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=490250#490250
Message 5
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Look at the Paintball tank option. Small pumped up to 4500psi will get you to 38KGcm2
from an empty tank.
Compressor via Ali Babba
https://i.postimg.cc/7h4cvD8R/Pballcombo.jpg
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=490266#490266
Message 6
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Mostly, it has been said.
- less prime
- less throttle
- learn what your engine prefers
On a hot engine, I would not prime it at all. 1/4 throttle or less, pump for pressure
(no prime) and hit the button. If it does not start in 3 blades, stop.
Add 2 primes and hit it again. That is a starting point. Mine hot starts
every time with no prime and just a little throttle. A quite calm event compared
to the cold start.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=490267#490267
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