wheels

The motor box must be mounted quite far back.

The only way I could come up with for mounting a choke servo was to put it on the side of the motor box then remove some of the fiberglass on the fuse front to let the box slide into place, not the sexiest solution but with the cowl on only I will know.

I think that it's going to come out a little nose heavy even moving the batteries as far back as possible but I cannot imagine this model flying heavy just because of a few added oz on the tail, that's a huge wing underneath it.

Should be LOTS of power and the motor is a sweet runner as long as it's got glow on at low RPM. (some say that the glow becomes unneccesary after break in, my motor is still fresh)

Seems like a great combination so far to me.

Dad_Roman

I got a nice reply from Jason on Seidels at HK.

Doesnt really say much but it was nice

Wulf

My Feedback: (5)

Would it be possible for you to post a few pictures of 450 engine installation?Another ?,are you going to use a muffler ring or straight out Zoomies?

Wulf

My Feedback: (5)

I was willing to wait but when I contacted Seidel I had had enough-When I wrote Wulfgang Seidel and he said that UMS was not going to ship any 7-70s to HK-Somethings fishy here-Seidel said he could ship me one in 2 months and the questions(waiting) go on!!

SOUTHERNX

Hi Radial 1951,the Saito450 is going into a 97' Gee Bee Y,and theSaito325 was to power a Stinson Reliant SR9(101").Unfortunately it is too large in diameter to go forward enough in the cowl.When Kochi posted the info about Advantag'sSaito sale,I bolted out to the shed,opened up the box containing the cowl,measured the BACK of the cowl, dashed inside and ordered the engine,pity I DIDN'T measure the front of the cowl!! No doubtI'll find a suitable airframe for the 325 to lug around.

rcdude7

My Feedback: (264)

I have a 450 also and although I don't see any casting porosity on my engine, It could have some on the inside where it is not visible, I would not be concerned unless it went all the way through the case. I think some porosity is normal, I have seen it on other engines with no ill effects in performance.

wheels

Sure Wulf, it's not on their at the moment, but when I put it on I'll post up.

I'm using the xhaust ring, I have the flex pipe mufflers here but in maybe 5 bench runs two of them have already broken off so I ordered the ring. The "zoomies" would just be too messy for my tastes.

Wulf

My Feedback: (5)

Ya the Keleo exhaust ring would be my choice also-Nice fit out of the way and bottom exit-Perfect for the GB :-)

super puma

My Feedback: (6)

Hi, a few pictures of the new Seidel UMS 7-35 the 7-70 are in the background. the cowl is for the GP Super-Stearman, lots of room, but the 7-70 does not fit by far.Solo Prop.
This looks like engine, can't wait to start it, should fit into a lot of models out there. got mine from Alan at Weston UK, nice place to buy seidels from.

super puma

My Feedback: (6)

The picture with the 7-70 and 7-35

Kmot

My Feedback: (24)

Duuuuuuuuude!

That is so awesome, in a GP Stearman? Wow!! [sm=thumbup.gif]

Kmot

My Feedback: (24)

Hello Nicola,

I just viewed a video of the 400 radial and the owner commented that it consumed 600ml in 11 minutes. Hope this helps.

Démarrage moteur PH400
ce moteur démarre très facilement
régime maxi avec 20 X 8 6900 tr/min
encore en rodage consommé 3 litres de LABEMA 1.2
le seul point noir on va dire c'est la consommation
600 ml en 11 minutes mais bon le bruit du 5 cylindre et lÃ* pour faire oublier cela

kivisto

Super Puma, does the seidel 7-35 fit the great planes stearman??? ideas about exhaust?

wheels

As promised



My throttle linkage solution...



Here's the choke servo I was talking about sitting in the notch I had to cut, turned out not too bad actually



and with the cowl

super puma

My Feedback: (6)

Hi, The UMS Seidel 7-35 are much smaller than the 7-70 only about half the cylinder volume. It is due to be delivered this summer, mine is pre -prodution model. I just had the cowl for the GP Super Stearman at hand to show the sice of the engine, I have a Saito 170 3cyl radial for this plane.
The 7-70 does not fit inside this cowl, or most kit cowls for models offered for scale, ie. EMS and 70" ++ range scale models.
The 7-35 is 187mm dia. / 25.4mm = 7.36"dia. The 7-35 is 235mm dia. / 25.4 = 9.25"dia. this is just to much for a lot of the cowls out there and I have been looking for a suitable model for this engine ,not to large. (I think the new Swordfish bi plane will fit the 7-70, and be a nice comination)
Anayway the best way to be to display these engines would be with models that use no cowls, like the GP stearman miltary version, I think it will fly great with the 7-35 wich uses a 16" to 20 " prop. for Seidel UMS se: www.umstech.in
I don't know about aney exhaust collector ring for the 7-35 but someone will aftermarket this I'm sure, I think this radial will be popular if it runs as great as it looks, plan to start mine soon.

AmishWarlord

My Feedback: (5)

Nice!

The Saito 450 reminds me of a 70's style space fighter. If CGI hadn't taking over the special effects in movies I'm sure we would have seen a 450 with all kids of plastic tubing and pieces glued onto it zooming around the galaxy.

Wulf

My Feedback: (5)

Thanks Wheels-
Wow the 425 is a huge engine !It makes the 27% GB look small and that is a big plane! I`m planning on the same setup as you have here in same plane-I have the 27% PA-GB-Y that the 425 will go into also.Looks like you will be adding some tail weight let me know how much you will have to add?Your throttle set-up looks clean,,nice.
Thanks for the pictures I`ll be viewing them again when I do engine install.

dragonbuilder

My Feedback: (1)

Has anyone heard anything more on the OS FR-7?

Godflesh

Not much, only that it costs an arm and leg! 3k+? Insane. Thats the price of a Moki 150[>:]

wheels

Lol nice chop Amish

frets24

My Feedback: (15)

Anyone know anything about TechnoPower engines? Specifically the discontinued 5 cyl 1.39cc A series motor.
Just got one of these and noticed that the RPMs are limited to 7500 static and have a "do not exceed" limit of 8000. Says that this will only swing a 14x8 prop at 7500, that is only about 56mph on the plane ...is this what real world experiences are indicating.
Seems like a 130 plus engine should do better than that even considering operating power loss. I know my saito 90-R3 performs like a strong 56 single and the 170 R3s act like a 150 single, so I guess I thought a 5 cyl 1.39 should at least compare to a 115 or a 100 single.

Ideas? Thoughts? real life experience?......

the Gnome

Frets24, as the 5 cyl. Technopower is some years old, the master rod is quite difficil (the engine don't weighs much for a radial) and it has very low compression ratio (I use my 7A with lit plugs all the time), the output really cannot be as high as You expect.

Also, I've heared the rocker boxes on this early engines are made from plastic and cannot stand high temperatures, have a look at this, may be You better be carefull with full power flying. The Technopower-manual say to choose a slow and light model plane, rather a Polikarpov bipe than a Corsair warbird.

gnome

Holm und Rippenbruch

kochj

Here is a nice vid of a 3-cy 450 saito running in a pup...
NIce DEEP rumble....

Wulf

My Feedback: (5)

Wheres the video???

Kmot

My Feedback: (24)

The Seidel 7-cylinder is back in stock at Hobby King:

http://www.hobbyking.com/hobbyking/s...dProduct=11028