Ed_Moorman

My Feedback: (1)

Looks like you are comparing the bare weight of the 100 with the all up weight of the 120. The Horizon web site shows 19.4 for the 100, which I know is heavier than the .91. I have weighed both of my 91s and they weigh 20.5 ounces with muffler. This is compared to the Horizon weight of 18.3 ounces, so figure 2-2.5 ounces for the muffler. If you add 2.5 to the listed 19.4 you get about 22 ounces.

They list the 120 as 820 grams which is 28.9 ounces. Figure 2.5-3 ounces for the larger muffler-I'd say 3 ounces, and you have 31.9 or approx 32 ounces. So you are looking at a 10 ounce difference. You might also figure the prop weight because a 120 will turn a bigger, and heavier, prop than the 100. I think with the 120 you could figure about 3/4 lb difference, ready to fly.

The 5-cell pack is probably NiCds. A 1650 mil NiMH would be lighter.

DHammer

My Feedback: (11)

Pat,
just FYI, I use DuBro remote glows on all my cowled planes, specially the one with inverted engine applications. They work great, and the weight is minimal-bout 1 1/2 ounces. They make one especially for a 4 banger, it's plug contact is angled, works slick and well worth the $11.00.
I am using the same engine combination as you, and darn near the same servo set up. My Saito was on another plane that I sold that weighed about 10 1/2 lbs., and even in Colorado it performed well. When I finish the Mayhem and maiden it, I will start out with a 15x6 to see how things go and may go to a 16x6. (I am running a 15x6 on my saito 100 and it handles it fine)
By the way, where did you mount the battery in the fuselage to get it to balance out, I am using a 6v 5cell pack myself so it would be helpful to know. If you can post pictures that would be great.

Also nice to hear how well SIG treated you, customer service goes a long way with a company.

Dhammer

hulley29

My Feedback: (1)

what is everyone using for hinges? I'm undecided about using the stock ca hinges or going with robarts, there doesnt seems to be alot of material for the robarts. any tips would be great.

AIRPLANENUTS

My Feedback: (2)

I'm using the ca hinges. Robarts are nice, but they're a pain to install.

robinr767

My Feedback: (4)

TA-DA!

Construction complete down to the decals.

All that remains is to balance CG and see how this
engine runs head down.

Pictures:
Finished airplane
Install of OS 1.2 Surpass
Cheap, fast solution to wheel pants seams - (trim strip).
Through the hull item locations located not to disturb plywood
remote glow head
fueler port
charge port
off on switch

Cowling, I did have to reinforce a crack that developed from numerous install/uninstalls. It look as though it will provide enough cooling airflow.

Sorry, I'm not able weigh the airplane.

Weather looks OK for maiden flight on Saturday.

Robin

AIRPLANENUTS

My Feedback: (2)

GREAT pics! Can't wait to hear flight report. I'm curious to hear how it balanced, too. The stripes on the wheel pants is a great idea. Any ideas on how to protect a plastic spinner from an electric starter?

robinr767

My Feedback: (4)

Balanced 5.375" from leading edge with 5 cell 1400 MA nicads agains the bottom of servo. - close enough for me.

Re the plastic spinner - I have had good luck by really pressing HARD aginst the spinner before switching it on. I can start smalller engines - .46 or so with no problem. This size engine might be different.

Goinstraightup

My Feedback: (26)

Great job Robin!! I also am looking forward to hear how it flys.

flatspinman

My Feedback: (2)

Looks great Robin,

Let me know how she flys.

Chris

DHammer

My Feedback: (11)

Ditto Robin,
We are all waiting with high anticipation for your report.
Dhammer

Owild1

My Feedback: (7)

This plane is Awesome!!!!!!!! I put a new Saito 100 on a 14-8 Scimi prop 20% Four snaps straight up before it could barley see it............ everything was great except I got a first run and engine mount was way off had to realighn the wing bolt hole (1) way also off about 1/4 of a in was had gettin semetric correct but once that was done its is simply awesome had to add tail weight with 100 but 120 would bring it on the money have pic over on RCBAY

Steve

My Feedback: (54)

Owild1;
Did you have a correction paper in you box for the right firewall lines? We all have the first run plane and mine came with an update in the box. Do you have unlimited verticle with the 100? And do you have a final weight?

Steve

robinr767

My Feedback: (4)

Report:

Mayhem ARF
OS 1.2 Surpass with 16x6 wood Zinger prop
Hitec 645 metal gear servos - 5cell 1400mah nicad
Built as per manual + bottom of wing joint fiberglassed.
Weight 8#s,3oz.

Only got one flight in, the wind was starting to come
up as I got to the field. Very little trim was needed. I
had the throws set at the book called for then backed
them off about 1/4". Exponential set at -75%. It
seemed to track well and on low rates was still very
responsive.

I think it was running a little rich. Unlimited vertical, but not
the jack-rabbit I was expecting. I'm certain performance will increase with a twist of the needle valve.

Landing was fine. All and all a good first flight.

Wind came up, and I quit while I was ahead. Wind was gusting to 20mph plus in less than an hour.

DHammer

My Feedback: (11)

Robin,
Thanks for the report, even though there are a bunch of question we could ask, it appears as though you had a short sweet maiden and did not want to press the envelope with any careless flying of a new plane, specially in windy conditions. Very happy to hear the initial reports on how straight it tracks.

Owild1,
Appears as though you were fortunate with your maiden. My question would be the same one Steve asked, did you get the update, as the first batch of Mayhems had the wrong engine mount lines marked on the firewall? Glad you got it down in one piece, bet it was a handful.
Dhammer

robinr767

My Feedback: (4)

Dhammer,

If you have any questions, fire away. If I can answer, I'll be happy.
This airplane flies just like the other 3-d airplanes I have: a "Simply Magic" with a Thunder Tiger .46Pro, a "Pizazz" with an OS .71 Surpass and the Mayhem. They all have one thing in comman - They all need a good 3-D pilot.

Regards, Robin AKA 3-D Wannabe!

DHammer

My Feedback: (11)

Robin,
Well the questions I would like answered are the questions most 3D--or wanna be 3D Pilots like myself would like to know are;
how does the plane handle flat spins ( including inverted), knife edges, harriers, waterfalls, hovering, etc.
In your flight report it sounded as though flight conditions at the time of your maiden was less than optimal in attempting any of the maneuvers, and I do not blame you in not trying anything to risky with windy conditions you had at the time. Just hearing that the plane tracked well for you, and the performance was very encouraging.
Hopefully a perfect flying day will come soon to get a detailed report about how well it performs some of the 3D maneuvers.
I am about a week away in finishing mine, and since I am putting a 1.20 size 4 banger in it I was very interested in the performance aspect in case I needed to re-think the powerplant side.
Dhammer

Gbee

Did anyone use two elevator servos on the Mayhem? Do you need them?

robinr767

My Feedback: (4)

Dhammer820,
I said I was a 3-D wannabe, not a 3-D pilot!
We will be anxiously awaiting YOUR report.
Good luck --
Robin

DHammer

My Feedback: (11)

OUCH Robin,
Sorry, did not mean to offend you. When you said fire away I thought you meant that you did some other maneuvers and you could expand upon your report. In no way was I trying to belittle your experience.
Maybe we both did not read each other's posts closely. If you note in mine I referred to myself as a wanna be 3-D pilot also. I have tried the maneuvers but I sure haven't mastered them.
Dhammer

csliger

That's the cool thing about this hobby, it's full of great people! We may not be able to write like Melville or Wells, but we usually mean well! I'm waiting on the motor until there is somewhat of a consensus on which motor is OK. That and my other two servos have not come in yet!! I am installing flying wires on my tail to stiffen them up, I've heard elsewhere that they flop around a lot.

DHammer

My Feedback: (11)

csliger,
That is good Idea. I believe I will do that also.
There are a few people at the field that wish they would have done that with the u-can-do's, both 46/60 size, as most experienced flutter in the tail section soon after maiden flights. Probably common in all 3D entry planes, so another "ounce of prevention" should be applied.
Thanks again for bringing it up, might have saved a plane or two.
Dhammer

Mokken

My Feedback: (63)

Just ordered mine today:

3D Mayhem
YS 110FZ
APC 16x6
Hitec - 625MG - Ailerons, Elevator
Hitec - 5625MG - Rudder

I'm planning on building the plane per instructions using all existing hardware, but you never know.. Should be a great flying plane.

hulley29

My Feedback: (1)

MOKKEN, you are a GOOBER!!! I got my mayhem first[>:]. For everyone else, MOKKEN and I fly together, he's really a good guy! cant fly very well though!!!

flyingcrazy

My Feedback: (28)

Yes he is a ok guy we could fly in circles or Bend the Sticks right MOKKEN!!!!

Gbee

I just ordered my Sig Mayhem from Tower today. I plan on using an old reliable but 33 oz. heavy Enya 1.20 RGP 4 stroke. I would like to mount it on its side so I can use my Don Harris Pitts muffler with smoke. I'm considering adding an additional elevator servo (or mount the rudder servo in the tail) to offset the heavy engine. Also, I may install a smoke system (additional tank, pump, battery - that I make easily removable on a tray) but don't know yet about the smallish fuselage of the Mayhem. Servos will be Futaba 9202s on all flight controls. I know all the weight of smoke system isn't condusive to 3D, but I'm flying the engine, servos, smoke system in an old Zimpro Extra 230 with higher wing loading and looking for a slower more manuevareble plane to fly close in. Our runway is still snow covered, so I probably won't fly it till Spring. Looking forward to keeping this post alive. I'm currently flying my UCD 60 with Saito 1.00 off skis - is way cool.